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Kiptoon DK, Ngugi PM, Rana FS. "Cancer of the penis: case report." East Afr Med J. 2009;86(4):196-200. Abstract

Two patients with penile carcinoma are presented after management at a district hospital in Kenya. Both had undergone ritual circumcision as teenagers and presented late. HR was a 73 year old who presented with a fungating penile mass for which a partial penectomy was performed after wedge biopsy confirmed malignancy. He thereafter declined to have the surgical specimen sent for histology and took the amputated stump for burial in his compound to avoid bad omen. GK was 25 years old and presented with a fungating mass and underwent partial penectomy after a histological diagnosis was made. He absconded from follow-up after being informed of the need for further surgery due to tumour infiltration of the surgical margins. The history and clinical images are presented and we discuss the difficulties of cancer management at a rural district hospital.

Kiptoon DK. The immediate postoperative outcome of patients undergoing prostatectomy for benign prostatic hyperplasia at Kenyatta National Hospital.; 2004. Abstract

Objective: To describe the common postoperative complications of prostatectomy as
seen at Kenyatta National Hospital.
Materials and Methods: This is a prospective study of patients who underwent
prostatectomy for benign prostatic hyperplasia at Kenyatta National Hospital between
6th October 2003 and 21 st June 2004.
Main outcome measures: Age, co-morbidity, type of surgery, complications, reoperation,
mortality, postoperative catheterisation, and duration of postoperative
hospital stay.
Results: A total of eighty five patients participated in the study, and their average age
was 66 years. Open prostatectomy was the more common type of prostatectomy
accounting for 81 % of cases while transurethral resection accounted for 19 % of
cases.
The most common intra-operative complication during prostatectomy was
haemorrhage which occurred in ten patients (11.8 %).
The most common postoperative complication following prostatectomy was wound
sepsis occurring in 24 patients (35 %, n=69). Other postoperative complications
observed were urinary tract infection (15 %), clot retention (10 %), pyrexia (10 %),
and pneumonia (8.2 %).
Three patients (4.4 %) required re-operation due to complications of postoperative
wound sepsis.
One patient had perforation of the bladder during transurethral resection and required
a laparotomy to repair the bladder.
Twenty six patients (30 %) had co- existing medical conditions. There was a
significant association between wound sepsis and diabetes mellitus (p< 0.05).
The mean duration of postoperative catheterisation was 6.66 days. There was a
significant difference in the duration of postoperative catheterisation between open
prostatectomy and transurethral resection (p= 0.001).
The mean duration of postoperative hospital stay was 8.16 days.
There was a significant difference in the duration of postoperative hospital stay
between open prostatectomy and transurethral resection (p= 0.001).
Conclusions: The duration of postoperative catheterisation and hospital stay are
mainly determined by type of prostatectomy, and the presence of diabetes mellitus
significantly increased the risk of developing postoperative wound sepsis.

Kiptoo CC, Gerber A, Van der Merwe A. "{Towards Citizen-Expert Knowledge Exchange for Biodiversity Informatics: A Conceptual Architecture}." The African Journal of Information and Communication (AJIC). 2016. Abstract

This article proposes a conceptual architecture for citizen-expert knowledge exchange in biodiversity management. Expert services, such as taxonomic identification, are required in many biodiversity management activities, yet these services remain inaccessible to poor communities, such as small-scale farmers. The aim of this research was to combine ontology and crowdsourcing technologies to provide taxonomic services to such communities. The study used a design science research (DSR) approach to develop the conceptual architecture. The DSR approach generates knowledge through building and evaluation of novel artefacts. The research instantiated the architecture through the development of a platform for experts and farmers to share knowledge on fruit flies. The platform is intended to support rural fruit farmers in Kenya with control and management of fruit flies. Expert knowledge about fruit flies is captured in an ontology that is integrated into the platform. The non-expert citizen participation includes harnessing crowdsourcing technologies to assist with organism identification. An evaluation of the architecture was done through an experiment of fruit fly identification using the platform. The results showed that the crowds, supported by an ontology of expert knowledge, could identify most samples to species level and in some cases to sub-family level. The conceptual architecture may guide and enable creation of citizen-expert knowledge exchange applications, which may alleviate the taxonomic impediment, as well as allow poor citizens access to expert knowledge. Such a conceptual architecture may also enable the implementation of systems that allow non-experts to participate in sharing of knowledge, thus providing opportunity for the evolution of comprehensive biodiversity knowledge systems.

Kiptoo. Towards road traffic information system using multi-agents. Nairobi: University of Nairobi; 2006.
Kiptoo CC, Gerber A, van der Merwe A. {The ontological modelling of fruit fly control and management knowledge}.; 2016. Abstract

© Springer International Publishing Switzerland 2016. Fruit fly control and management in Africa has been the topic of several scientific investigations resulting in diverse sources of knowledge on the topic. Despite the existence of this knowledge, frequently it is not readily accessible to all targeted beneficiaries; this can be due to, for example, the remote locations of farms and the complexity of the knowledge. However, recent technological developments such as web technologies and networking allow for the engagement and participation of stakeholder groups in the acquisition and dissemination of knowledge and these technologies can also be applied to fruit fly knowledge. In order to facilitate this stakeholder participation in fruit fly knowledge sharing, the relevant domain knowledge needs to be available in a format that can support stakeholder engagement, preferably through the Web. Fruit fly knowledge has not been modelled in this manner and this paper reports on an investigation to model and capture the relevant domain knowledge using ontologies. The objective of this work is thus the development of the domain ontology and its evaluation using a prototype stakeholder participation system for fruit fly control and management that was capable of utilising the ontology. We describe our findings on the use of ontology technologies for representation of fruit fly knowledge, the fruit fly ontology developed, as well as a prototype Web-based system that uses the ontology as a source of knowledge.

Kiptoo CC. {An ontology and crowd computing model for expert-citizen knowledge transfer in biodiversity management. Study Leaders : Aurona G., Van de Merwe A.}. PhD Thesis ed. University of Pretoria; 2017. AbstractWebsite

Knowledge transfer has been identified as a strategic process for bridging the persistent gap between theory and practice. In biodiversity management, experts generate different types of knowledge that is transferred to citizen communities for practice. On the other hand, citizens constantly interact with their biosphere and from time to time are requested to convey ground knowledge to the experts for scientific analysis and interpretation. The transfer of knowledge between experts and citizens is faced by different challenges key among them being the large volume of the knowledge, complexity of the knowledge, as well as variegated absorptive capacity among citizen communities. Knowledge transfer models adopted for expert-citizen engagement in the biodiversity management domain must therefore consider these characteristics of the domain. Advances in computing technologies present opportunities to create knowledge transfer models that can minimize these challenges. Current knowledge transfer models were created mainly for organizational knowledge transfer and without consideration of specific computing technologies as a mode of knowledge transfer. These challenges and opportunities highlighted a need to investigate how a technology-based knowledge transfer model for biodiversity management could be created. The focus of this study was to explore enhancement of knowledge transfer in the biodiversity management domain using two specific technologies; knowledge representation using ontologies and crowd computing. The research draws from existing knowledge transfer models and properties of the two technologies. This study assumed the pragmatist philosophical stance and adopted the design science research (DSR) approach which is characterised by two intertwined cycles of ‘build' and ‘evaluate'. The research produced two main contributions from the two cycles. The build cycle led to creation of a technology-based model for knowledge transfer between experts and citizens in the biodiversity domain and was named the Biodiversity Management Knowledge Transfer (BiMaKT) model. Evaluation cycle resulted in development of a platform for transfer of biodiversity management knowledge between experts and citizens. The BiMaKT model reveals that two technologies; knowledge representation using ontologies and crowd computing, could be synergised to enable knowledge transfer between experts and citizens in biodiversity management. It is suggested that this model be utilised to guide development of biodiversity management applications where knowledge needs to be transferred between experts and citizens. The model also presents opportunity for exploration in other domains, especially where experts and citizens need to exchange knowledge. The knowledge transfer platform, reveals that the BiMaKT model could be used to guide development of biodiversity management knowledge transfer platforms. The study utilises a case of fruit fly control and management knowledge transfer between fruit fly experts and fruit farmers for evaluation of the contributions. An experiment using the case demonstrated that the challenges facing knowledge transfer in the domain could be reduced through ontological modelling of domain knowledge and harnessing of online crowds participation through crowd computing. The platform presents opportunity for more empirical studies on usage of the platform in knowledge transfer activities.

Kiptinness. J, Wurapa. E, Bulimo. W, Wamunyokoli. F. Molecular Characterization of HPIV1 in Infants Attending Mbagathi District Hospital, Nairobi, Kenya. . Sarova Panafric Hotel Nairobi Kenya.; 2012. Abstract
n/a
Kiprop EK;, Narla RD;, Mibey RK;, Akundabweni LMS. "Chemical Control Of Septoria Leaf Spot On Cowpea (Vigna Unguiculata (L.) Walp,) In Kenya."; 2007. Abstract

Three foliar fungicides namely, Antracol, Kocide 101 and Folicur were evaluated for the control of Septoria leaf spot caused by S. vignicola V.G. Rao on cowpea [Vigna unguiculata (L.) Walp.] at two field sites in Kenya: Kabete and Katumani. The cowpea variety used was the high yielding Machakos 66 that was also susceptible to Septoria leaf spot. Reduction in disease incidence and severity of Septoria leaf spot on cowpea was obtained with the three fungicides. However, significant (P≤0.05) increase in seed yields was obtained when Kocide 101 and Antracol were applied to cowpea plants with the disease at Katumani. Folicur was found to be phytotoxic to cowpea plants and hence reduced plant dry weight and seed yield at both sites. Based on the cost-benefit analysis of the fungicides in the present study, Antracol and Kocide 101 are recommended for the control of Septoria leaf spot on high yielding cowpea varieties in arid and semi-arid areas. The Pearson correlation (r) between the disease incidence and seed yield was 0.75 (P=0.46), while that between disease severity and seed yield was 1.00 (P=0.01).

Kiprop EK;, Narla, R. D.; Mibey ARK; LM, Mibey RK;, Akundabweni LMS. "Chemical Control Of Septoria Leaf Spot On Cowpea (Vigna Unguiculata (L.) Walp,) In Kenya."; 2007. Abstract

Three foliar fungicides namely, Antracol, Kocide 101 and Folicur were evaluated for the control of Septoria leaf spot caused by S. vignicola V.G. Rao on cowpea [Vigna unguiculata (L.) Walp.] at two field sites in Kenya: Kabete and Katumani. The cowpea variety used was the high yielding Machakos 66 that was also susceptible to Septoria leaf spot. Reduction in disease incidence and severity of Septoria leaf spot on cowpea was obtained with the three fungicides. However, significant (P≤0.05) increase in seed yields was obtained when Kocide 101 and Antracol were applied to cowpea plants with the disease at Katumani. Folicur was found to be phytotoxic to cowpea plants and hence reduced plant dry weight and seed yield at both sites. Based on the cost-benefit analysis of the fungicides in the present study, Antracol and Kocide 101 are recommended for the control of Septoria leaf spot on high yielding cowpea varieties in arid and semi-arid areas. The Pearson correlation (r) between the disease incidence and seed yield was 0.75 (P=0.46), while that between disease severity and seed yield was 1.00 (P=0.01).

Kiprop EK, Mwang’ombe AW, Baudoin JP, Kimani PM, Mergeai: G. "Occurrence of pathogenic pathotypes of Fusarium udum Butler in Kenya.". 1999.
Kipronoh AK, Ombui JN, Binepal YS, Wesonga HO, Gitonga EK, Kiara HK. "Risk factors associated with contagious caprine pleuropneumonia in goats in pastoral areas in Rift Valley region of Kenya." Preventive Veterinary Medicine . 2016;132:107-112.
Kipronoh AK, Kiara HK, Binepal YS, Ombui JN. "Pastoralists perception of constraints affecting goat production in Rift Valley Region of Kenya." Livestock Research for Rural Development. 2016;28(3).
Kipronoh AK, Ombui JN, Kiara HK, Binepal YS, Wesonga HO, Gitonga EK. "Prevalence of contagious caprine -pneumonia in pastoral flocks of goats in the rift valley region of Kenya." Tropical Animal Health and Production. 2015;48(1):151-155.
Kiprok EK;, Narla RD;, Mibey, RK; Akundabweni LMS, Akundabweni LMS. "Screening Cowpea (Vigna unguiculata (L.) Walp). Genotypes for Resistance to Septoria Leaf Spot in Kenya.".; 2004.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.,(1987). Lessons learnt from Arid and Semi Arid Lands Development Projects in Kenya. Proceedings of a Conference on Project Identification in Developing Countries, held at the University of Manchester, U.K. September, 1987.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1987. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Stroosnijder, L., 2004. Watershed conservation in semi arid Kenya, Submitted to Physics and chemistry of the earth.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2004. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop performance and yield. The objective of this study was to stochastically simulate the behaviour of dry and wet spells and rainsums in Iiuni watershed, Kenya. The stochastic behaviour of the longest dry and wet spells (runs) and largest rainsums were simulated using a Markov (order 1) model. There were eight raingauge stations within the watershed. The entire analysis was carried out using probability parameters, i.e. mean, variance, simple and conditional probabilities of dry and rain days. An analysis of variance test (ANOVA) was used to establish significant differences in rainfall characteristics between the eight stations. An analysis of the number of rain days and rainfall amount per rain day was done on a monthly basis to establish the distribution and reliability of seasonal rainfall. The graphical comparison of simulated cumulative distribution functions (cdfs) of the longest spells and largest rainsums showed Markovian dependence or persistence. The longest dry spells could extend to 24 days in the long rainy season and 12 in the short rainy season. At 50% (median) probability level, the largest rainsums were 91 mm for the long rainy season and 136 mm for the short rainy season. The short rains were more reliable for crop production than the long rains. The Markov model performed well and gave adequate simulations of the spells and rainsums under semi arid conditions.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah. E.K; L. Stroosnijder; T.C. Sharma; and R.K. Cherogony, Effect of conservation tillage on watershed hydrology in Semi Arid Kenya: An application of AGNPS, SCS-CN and Rational Formula runoff models. Proceedings of the 13th International Congress of .". In: Bloemfontein, South Africa. Kisipan, M.L.; 1998. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Yabann, W.K., E.K. Biamah and A.J. Haji (1994). Environmental impact assessment of the Arid Lands Project (ALP), Kenya. Emergency Drought Recovery Programme, Department of Relief and Rehabilitation, Office of the President, Kenya. May, 1994.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1994. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.,(1988b). Evaluation of Feasible Conservation Strategies in Sub-Saharan Africa: A case study on Kenya and Malawi. In: Challenges in Dryland Agriculture ; A Global Perspective. P.W. Unger, T.V. Sneed W.R. Jordan and R. Jensen (Eds.). Proceeding.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1988. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., G. Sterk, T.C. Sharma. 2005. Analysis of agricultural drought in Iiuni, Eastern Kenya: Application of a Markov model. J. Hydrol. Processes (2005).". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2005. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop performance and yield. The objective of this study was to stochastically simulate the behaviour of dry and wet spells and rainsums in Iiuni watershed, Kenya. The stochastic behaviour of the longest dry and wet spells (runs) and largest rainsums were simulated using a Markov (order 1) model. There were eight raingauge stations within the watershed. The entire analysis was carried out using probability parameters, i.e. mean, variance, simple and conditional probabilities of dry and rain days. An analysis of variance test (ANOVA) was used to establish significant differences in rainfall characteristics between the eight stations. An analysis of the number of rain days and rainfall amount per rain day was done on a monthly basis to establish the distribution and reliability of seasonal rainfall. The graphical comparison of simulated cumulative distribution functions (cdfs) of the longest spells and largest rainsums showed Markovian dependence or persistence. The longest dry spells could extend to 24 days in the long rainy season and 12 in the short rainy season. At 50% (median) probability level, the largest rainsums were 91 mm for the long rainy season and 136 mm for the short rainy season. The short rains were more reliable for crop production than the long rains. The Markov model performed well and gave adequate simulations of the spells and rainsums under semi arid conditions.
KIPNGETICH PROFBIAMAHELIJAH. "Seasonal crop response to conservation tillage under dryland conditions. Proceedings of the 15th International Soil Tillage Research Organization (ISTRO). Dallas Fort Worth, Texas, USA.". In: Bloemfontein, South Africa. Kisipan, M.L.; 2000. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., C.K.K. Gachene, P.T. Gichem and R.K.K. Cherogony (1994f). Seasonal variability in soil moisture due to tillage and residue mulching of a clay soil. In: Soil Tillage for Crop Production and Protection of the Environment. Proceedings of 13th I.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1994. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah,E.K.,(1989c). Waterharvesting and Conservation techniques for increased crop and fodder production in Arid and Semi Arid Areas of Kenya. Paper presented at a workshop on ASAL s soil and water conservation, Ministry of Agriculture, Nairobi, Kenya. S.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1989. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Gichuki. F., 2004. Land and Water Management for Poverty Alleviation: Experiences from Iiuni Watershed, Machakos District, Kenya. Paper submitted to Journal of WaterSA, South Africa.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2005. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop productivity. Model simulation of the stochastic behaviour of dry and wet spells and rainsums provides some insights into: the differences in rainfall characteristics within an agricultural watershed; and distribution and reliability of seasonal rainfall for various uses. The longest dry spell analysis is of practical relevance to the selection of the best conservation practices (including conservation tillage) for soil and water management whilst the largest rainsum analysis can be used to determine the watershed runoff volume and discharges that would assist in the design of flood and erosion control structures, and the design of runoff water catchment systems (RWCS), which are essential for supplementary irrigation in semi arid Kenya. This study adopted an agro-hydrologic systems approach to the mitigation of agricultural drought at micro, meso and macro scale levels within an agricultural watershed. This approach had its premise that many agricultural drought problems in unstable ecosystems are best solved through farmers interventions at the micro scale level, conservation planning at the meso scale level and resource management at the macro scale level. Thus, the adopted agro-hydrologic systems approach is holistic and aimed at optimizing soil and water management in hydrologically defined geographical areas. The three levels of agricultural drought mitigation should be hierarchical and must consider all factors influencing the hydrologic and hydraulic properties of dominant soils in semi arid Kenya.
KIPNGETICH PROFBIAMAHELIJAH. "Conservation Planning and management of agricultural watersheds; in semi arid Kenya: Strategies and Technological options. Accepted by Engineering in Agriculture and Environmental. Journal of the Kenya Society of Agricultural Engineers, Nairobi, Kenya.". In: Bloemfontein, South Africa. Kisipan, M.L.; 2001. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah E.K. L.M. Nagava. E.M. Gichangi and R.X.K. Cherogony (f 994j), Micrcscale effects of tillage and organic manure on infiltration and erosion of a crushing soil. In Soil Tillage for Crop Production and Protection of the Environmental Proceedings of 1.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1994. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., J.K. Gikonyo, P.T. Gicheru and S.O. Oketch (1992a). Influence of tillage on crop water use at Kalalu, Laikipia, Kenya. East African Journal of Sciences, Kenya. August, 1992.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1992. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.,(1983). Comparison between field measurements and local climatic estimates of crop water use in Oklahoma. M.Sc. Thesis. Oklahoma State University. Stillwater, Oklahoma, USA.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1983. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Sterk, G., Stroosnijder, L., 2005. Tillage and Farmyard Manure effects on Crusting and Compacting Soils in Semi Arid Kenya. Paper accepted for publication by Euro Asian Journal of Applied Sciences.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2005. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop productivity. Model simulation of the stochastic behaviour of dry and wet spells and rainsums provides some insights into: the differences in rainfall characteristics within an agricultural watershed; and distribution and reliability of seasonal rainfall for various uses. The longest dry spell analysis is of practical relevance to the selection of the best conservation practices (including conservation tillage) for soil and water management whilst the largest rainsum analysis can be used to determine the watershed runoff volume and discharges that would assist in the design of flood and erosion control structures, and the design of runoff water catchment systems (RWCS), which are essential for supplementary irrigation in semi arid Kenya. This study adopted an agro-hydrologic systems approach to the mitigation of agricultural drought at micro, meso and macro scale levels within an agricultural watershed. This approach had its premise that many agricultural drought problems in unstable ecosystems are best solved through farmers interventions at the micro scale level, conservation planning at the meso scale level and resource management at the macro scale level. Thus, the adopted agro-hydrologic systems approach is holistic and aimed at optimizing soil and water management in hydrologically defined geographical areas. The three levels of agricultural drought mitigation should be hierarchical and must consider all factors influencing the hydrologic and hydraulic properties of dominant soils in semi arid Kenya.
KIPNGETICH PROFBIAMAHELIJAH. "Conservation tillage for dryland farming: Promotion of conservation tillage techniques for improving household food security in semi arid Kenya. Paper presented at a Regional Workshop on Conservation Tillage, Arusha. Tanzania.". In: Bloemfontein, South Africa. Kisipan, M.L.; 2001. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Kaumbutho. P.G.; M. Sishekanu; G. Gebresenbet; and E.K. Biamah(1996). Tillage effect on soil water conservation properties of a hardsetting soil in a semi arid environment. Proceedings of the 9th International Soil Conservation Organisation Conference. Bo.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1996. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.; F.N. Gichuki and P. G. Kaumbutho (1993). Tillage methods and soil and water conservation in Eastern Africa. Soil Tillage Research, 27 (1993) 105-123. Elsevier Science Publishers, The Netherlands.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1993. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.; Nyagah, C.R.J.,(1985). Proposed Integrated Rehabilitation Programme for the Chemeron Watershed Area, Central Baringo, Kenya. Project Proposal Document, Ministry of Agriculture,Nairobi,Kenya.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1985. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Nhlabathi, N., 2003. Conservation tillage practices for dryland crop production in semi arid Kenya: Promotion of conservation tillage techniques for improving household food security in iiuni, Machakos, Kenya. p 45-50. In: Beukes, D., de Vil.". In: Bloemfontein, South Africa. Kisipan, M.L.; 2003. Abstract
In semi arid Kenya, the most dominant soil types are of limited agricultural productivity due to crusting and compaction. The occurrence of soil crusting and compaction is attributed to seasonal rainfall characteristics, physical soil properties and bad tillage practices. Soil crusting and compaction decreases rainwater infiltration and increases surface runoff. Increased and concentrated surface runoff water flow causes severe soil erosion. The objective of this study was to examine the hydrological effects of different tillage practices with and without farmyard manure on infiltration, surface runoff and soil loss of crusting and compacting soils under field and laboratory conditions in semi arid Kenya. Field investigations on infiltration, soil moisture, surface runoff, soil loss, soil bulk density and soil shear strength covered two rainy seasons (short and long rains) and were done on a Chromic Luvisol. The field treatments were zero and conventional tillage, and two farmyard manure applications (5 and 10 Mg/ha). Laboratory investigations on infiltration, time to runoff, surface runoff, soil loss and penetration resistance were conducted under simulated rainfall on four Luvisols for sixty days with the same farmyard manure (5 and 10 Mg/ha) treatments. A regression analysis and a one way ANOVA revealed significant (P<0.05) differences between soil types and treatments. The results obtained showed significant effects of conventional and zero tillage and farmyard manure on infiltration and soil moisture, time to runoff, surface runoff and soil loss. Soil crusting and compaction significantly influenced the hydrological responses of all soil types and treatments. These responses were attributed to seasonal rainfall events of varying amounts, intensities and duration and treatment differences in soil surface conditions and aggregation. Farmyard manure (FYM) application enhanced infiltration and reduced soil crusting and compaction, and surface runoff during the initial stages of the rainy season. But in the mid-stages of the rainy season, the effects of FYM on soil aggregation diminished and resulted in an increase in soil loss. At the end of the rainy season, when soil crusts had formed, some significant decrease in soil loss with FYM treatments was observed. Conventional tillage without farmyard manure led to high surface runoff and soil loss in these structurally unstable soils. Zero tillage performed poorly under these soil conditions because of high soil crusting and compaction, low rainwater infiltration and subsequent increase in surface runoff.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K; A.N. Gitau; and R.K. Cherogony(1998a). Temporal hydrologic response of unstable crusting soils in Semi Arid Kenya, Proceedings of the Kenya Society of Agricultural Engineering(KSAE). Nairobi, Kenya. Gicheru, P.T.; C.K.K. Gachene and E.K.Biama.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1998. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.,(1986). Technical and Socio-Economic considerations in rehabilitating and conserving an eroded/denuded catchment area: A case study of the Chemeron Catchment Area, Central Baringo, Kenya. In: Soil and Water Conservation in Kenya . Proceedings.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1986. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
Kipngetich B, Wandiga SO, Madadi VO, Mukabi M. "Dissipation studies of Amitraz in cattle dips in Bureti, Kericho county- Kenya." International Journal of Scientific Research in Science, Engineering and Technology. 2017;3(5):248-253.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Sterk, G., Sharma, T.C. 2004. Analysis of agricultural drought in Iiuni, Eastern Kenya: Application of a Markov model. J. Hydrol. Processes.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2004. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop performance and yield. The objective of this study was to stochastically simulate the behaviour of dry and wet spells and rainsums in Iiuni watershed, Kenya. The stochastic behaviour of the longest dry and wet spells (runs) and largest rainsums were simulated using a Markov (order 1) model. There were eight raingauge stations within the watershed. The entire analysis was carried out using probability parameters, i.e. mean, variance, simple and conditional probabilities of dry and rain days. An analysis of variance test (ANOVA) was used to establish significant differences in rainfall characteristics between the eight stations. An analysis of the number of rain days and rainfall amount per rain day was done on a monthly basis to establish the distribution and reliability of seasonal rainfall. The graphical comparison of simulated cumulative distribution functions (cdfs) of the longest spells and largest rainsums showed Markovian dependence or persistence. The longest dry spells could extend to 24 days in the long rainy season and 12 in the short rainy season. At 50% (median) probability level, the largest rainsums were 91 mm for the long rainy season and 136 mm for the short rainy season. The short rains were more reliable for crop production than the long rains. The Markov model performed well and gave adequate simulations of the spells and rainsums under semi arid conditions.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K; R.K. Cherogony and G.A. Mukolwe. Runoff water harvesting and conservation technologies for dryland crop production and rural water supply in arid and semi arid lands. Proceedings of the 13th International Congress of Agricultural Engineering .". In: Bloemfontein, South Africa. Kisipan, M.L.; 1998. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., G.K. Maritim and W.K. Yabann (1994c). Report on Grassroots community mobilization in Kalokol, Central Turkana. Emergency Drought Recovery Programme, Department of Relief and Rehabilitation, Office of the President, Kenya. May, 1994.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1994. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Smith, J.L.; Biamah, E.K.; Otieno, J.O.,(1988). Simulating Rainfall, Runoff and Soil Erosion using a Distributed Parameter Model (ANSWERS) The Kenya Engineer, Journal of the Institution of Engineers of Kenya. July/August, 1988.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1988. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Omuto, T.C., Walsh, M.G., Shepherd, K.D., Biamah, E.K., 2004. Nonlinear mixed effect fitting of soil hydraulic functions from a large watershed, Minor corrections suggested to paper, corrected and sent back to Journal of Soil Science Society of America.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2004. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop performance and yield. The objective of this study was to stochastically simulate the behaviour of dry and wet spells and rainsums in Iiuni watershed, Kenya. The stochastic behaviour of the longest dry and wet spells (runs) and largest rainsums were simulated using a Markov (order 1) model. There were eight raingauge stations within the watershed. The entire analysis was carried out using probability parameters, i.e. mean, variance, simple and conditional probabilities of dry and rain days. An analysis of variance test (ANOVA) was used to establish significant differences in rainfall characteristics between the eight stations. An analysis of the number of rain days and rainfall amount per rain day was done on a monthly basis to establish the distribution and reliability of seasonal rainfall. The graphical comparison of simulated cumulative distribution functions (cdfs) of the longest spells and largest rainsums showed Markovian dependence or persistence. The longest dry spells could extend to 24 days in the long rainy season and 12 in the short rainy season. At 50% (median) probability level, the largest rainsums were 91 mm for the long rainy season and 136 mm for the short rainy season. The short rains were more reliable for crop production than the long rains. The Markov model performed well and gave adequate simulations of the spells and rainsums under semi arid conditions.
KIPNGETICH PROFBIAMAHELIJAH. "Suitable Conservation Techniques for the Nyando River Catchment Area. Lake Victoria Basin. Unpublished Study Report.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1999. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K. and W.K. Yabann (1994e). Training of Trainers Report on Community participation in project planning in arid lands of Kenya.' Emergency Drought Recovery Programme, Department of Relief and Rehabilitation, Office of the President, Kenya. Octobe.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1994. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah,E.K.,(1989b). Editor of proceedings of a UNEP/FAO seminar on Soil Conservation Strategy for Africa. Accra, Ghana. August, 1989.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1989. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Omuto, T.C., Shepherd, K.D., Walsh, M.G., Coe, R., Biamah, E.K., 2005. Spectral reflectance screening of soil physical degradation using CART. Paper submitted to Journal of Remote Sensing of Environment.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2005. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop productivity. Model simulation of the stochastic behaviour of dry and wet spells and rainsums provides some insights into: the differences in rainfall characteristics within an agricultural watershed; and distribution and reliability of seasonal rainfall for various uses. The longest dry spell analysis is of practical relevance to the selection of the best conservation practices (including conservation tillage) for soil and water management whilst the largest rainsum analysis can be used to determine the watershed runoff volume and discharges that would assist in the design of flood and erosion control structures, and the design of runoff water catchment systems (RWCS), which are essential for supplementary irrigation in semi arid Kenya. This study adopted an agro-hydrologic systems approach to the mitigation of agricultural drought at micro, meso and macro scale levels within an agricultural watershed. This approach had its premise that many agricultural drought problems in unstable ecosystems are best solved through farmers interventions at the micro scale level, conservation planning at the meso scale level and resource management at the macro scale level. Thus, the adopted agro-hydrologic systems approach is holistic and aimed at optimizing soil and water management in hydrologically defined geographical areas. The three levels of agricultural drought mitigation should be hierarchical and must consider all factors influencing the hydrologic and hydraulic properties of dominant soils in semi arid Kenya.
KIPNGETICH PROFBIAMAHELIJAH. "Design of on-farm hydraulic structures for regulating road drainage. Accepted by Engineering in Agriculture and Environment. Journal of the Kenya Society of Agricultural Engineers, Nairobi, Kenya.". In: Bloemfontein, South Africa. Kisipan, M.L.; 2001. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah E.K , R.M. Chiti and R.K.K. Cherogony (1994j). Trends in infiltration, runoff and soil loss of unstable crusting soils In. .Soil Tillage for Crop Production and Protection of the Environment. Proceedings of 13th International Soil TillageResearch C.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1994. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E. K., (1991) . Soil Erosion Survey of Kaibon Catchment, West Pokot District. Study funded through the Suam River Catchment Rehabilitation Project (SRCRP) of the Kerio Valley Development Authority (KVDA), Vidman Consulting Engineers, Nairobi.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1991. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K. and R.K.K. Cherogony (1994h). Tillage technique for effective soil erosion control in Kenya: Evaluation of alternative fanya juu terrace designs. In: Soil Tillage for Crop Production and Protection of the Environment. Proceedings of 13th Inte.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1194. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Gitau, A.N., Gumbe, L.O., Biamah, E.K., 2005. Influence of soil water on stress-Strain Behaviour of a compacting soil in semi arid Kenya. Paper accepted for publication by Soil Tillage and Research Journal, an Elsevier Science Publication (in press).". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2005. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop productivity. Model simulation of the stochastic behaviour of dry and wet spells and rainsums provides some insights into: the differences in rainfall characteristics within an agricultural watershed; and distribution and reliability of seasonal rainfall for various uses. The longest dry spell analysis is of practical relevance to the selection of the best conservation practices (including conservation tillage) for soil and water management whilst the largest rainsum analysis can be used to determine the watershed runoff volume and discharges that would assist in the design of flood and erosion control structures, and the design of runoff water catchment systems (RWCS), which are essential for supplementary irrigation in semi arid Kenya. This study adopted an agro-hydrologic systems approach to the mitigation of agricultural drought at micro, meso and macro scale levels within an agricultural watershed. This approach had its premise that many agricultural drought problems in unstable ecosystems are best solved through farmers interventions at the micro scale level, conservation planning at the meso scale level and resource management at the macro scale level. Thus, the adopted agro-hydrologic systems approach is holistic and aimed at optimizing soil and water management in hydrologically defined geographical areas. The three levels of agricultural drought mitigation should be hierarchical and must consider all factors influencing the hydrologic and hydraulic properties of dominant soils in semi arid Kenya.
KIPNGETICH PROFBIAMAHELIJAH. "Rainfall characteristics and agricultural drought: A stochastic simulation of seasonal dry and wet spells using a Markov model. Submitted to Discovery and Innovation. Journal of the African Academy of Sciences, Nairobi, Kenya.". In: Bloemfontein, South Africa. Kisipan, M.L.; 2001. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Gikonyo, J K. and E.K. Biamah (1995b). The Influence of drip factors on soil moisture of a fluvisol in Kapsengere. Kenya. Journal of Discovery and Innovation, The African Academy of Sciences, Nairobi, Kenya 7(3):pp 289-298.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1995. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Gichuki, F.N., Kaumbutho, P.G., 1993. Tillage methods and soil and water conservation in Eastern Africa. Soil & Tillage research, 27: 105-123.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1993. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.,(1985). Editor, Proceedings of a Workshop on Soil Conservation on Grazing Lands. Ministry of Agriculture, Kenya.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1985. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., 2005. Coping with Drought: Options for soil and water management in semi-arid Kenya. Tropical Resource Management Papers No. 58 (2005).". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2005. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop productivity. Model simulation of the stochastic behaviour of dry and wet spells and rainsums provides some insights into: the differences in rainfall characteristics within an agricultural watershed; and distribution and reliability of seasonal rainfall for various uses. The longest dry spell analysis is of practical relevance to the selection of the best conservation practices (including conservation tillage) for soil and water management whilst the largest rainsum analysis can be used to determine the watershed runoff volume and discharges that would assist in the design of flood and erosion control structures, and the design of runoff water catchment systems (RWCS), which are essential for supplementary irrigation in semi arid Kenya. This study adopted an agro-hydrologic systems approach to the mitigation of agricultural drought at micro, meso and macro scale levels within an agricultural watershed. This approach had its premise that many agricultural drought problems in unstable ecosystems are best solved through farmers interventions at the micro scale level, conservation planning at the meso scale level and resource management at the macro scale level. Thus, the adopted agro-hydrologic systems approach is holistic and aimed at optimizing soil and water management in hydrologically defined geographical areas. The three levels of agricultural drought mitigation should be hierarchical and must consider all factors influencing the hydrologic and hydraulic properties of dominant soils in semi arid Kenya.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., 2002. Soil and water conservation. In: Managing Dryland Resources: An Extension Manual for Eastern and Southern Africa. International Institute of Rural Reconstruction (IIRR), Nairobi, Kenya. pp 83-99.". In: Bloemfontein, South Africa. Kisipan, M.L.; 2002. Abstract
In semi arid Kenya, the most dominant soil types are of limited agricultural productivity due to crusting and compaction. The occurrence of soil crusting and compaction is attributed to seasonal rainfall characteristics, physical soil properties and bad tillage practices. Soil crusting and compaction decreases rainwater infiltration and increases surface runoff. Increased and concentrated surface runoff water flow causes severe soil erosion. The objective of this study was to examine the hydrological effects of different tillage practices with and without farmyard manure on infiltration, surface runoff and soil loss of crusting and compacting soils under field and laboratory conditions in semi arid Kenya. Field investigations on infiltration, soil moisture, surface runoff, soil loss, soil bulk density and soil shear strength covered two rainy seasons (short and long rains) and were done on a Chromic Luvisol. The field treatments were zero and conventional tillage, and two farmyard manure applications (5 and 10 Mg/ha). Laboratory investigations on infiltration, time to runoff, surface runoff, soil loss and penetration resistance were conducted under simulated rainfall on four Luvisols for sixty days with the same farmyard manure (5 and 10 Mg/ha) treatments. A regression analysis and a one way ANOVA revealed significant (P<0.05) differences between soil types and treatments. The results obtained showed significant effects of conventional and zero tillage and farmyard manure on infiltration and soil moisture, time to runoff, surface runoff and soil loss. Soil crusting and compaction significantly influenced the hydrological responses of all soil types and treatments. These responses were attributed to seasonal rainfall events of varying amounts, intensities and duration and treatment differences in soil surface conditions and aggregation. Farmyard manure (FYM) application enhanced infiltration and reduced soil crusting and compaction, and surface runoff during the initial stages of the rainy season. But in the mid-stages of the rainy season, the effects of FYM on soil aggregation diminished and resulted in an increase in soil loss. At the end of the rainy season, when soil crusts had formed, some significant decrease in soil loss with FYM treatments was observed. Conventional tillage without farmyard manure led to high surface runoff and soil loss in these structurally unstable soils. Zero tillage performed poorly under these soil conditions because of high soil crusting and compaction, low rainwater infiltration and subsequent increase in surface runoff.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K. (1997). Conservation of cropland: Structural measures. In Soil and Water Conservation Manual for Kenya. !D B Thomas. A Encksscn. M. Grunder, and J.K. Mburu(eds). Soil and Water Conservation Branch, Ministry of Agriculture. Kenya.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1997. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah E.K., J.K. Muketha and W.K. Sitonik (1994b). Report of national seminar on "Community participation in project planning in ASAL, areas of Kenya, Emergency Drought Recovery Programme, Department of Relief and Rehabilitation. Office of the President,.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1994. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Thomas, D.B,; E.K.Biamah; A.M.Kilewe; L.Lundgren and B.O.Mochoge, Eds.(1986). Soil and Water Conservation in Kenya. Proceedings of the Third National Workshop, Kabete, Nairobi, Kenya. September, 1986.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1986. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Nhlabathi, N., 2003. Conservation tillage practices for dryland crop production in semi arid Kenya: Promotion of conservation tillage techniques for improving household food security in iiuni, Machakos, Kenya. In: Beukes, D., de Villiers, M.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2003. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop performance and yield. The objective of this study was to stochastically simulate the behaviour of dry and wet spells and rainsums in Iiuni watershed, Kenya. The stochastic behaviour of the longest dry and wet spells (runs) and largest rainsums were simulated using a Markov (order 1) model. There were eight raingauge stations within the watershed. The entire analysis was carried out using probability parameters, i.e. mean, variance, simple and conditional probabilities of dry and rain days. An analysis of variance test (ANOVA) was used to establish significant differences in rainfall characteristics between the eight stations. An analysis of the number of rain days and rainfall amount per rain day was done on a monthly basis to establish the distribution and reliability of seasonal rainfall. The graphical comparison of simulated cumulative distribution functions (cdfs) of the longest spells and largest rainsums showed Markovian dependence or persistence. The longest dry spells could extend to 24 days in the long rainy season and 12 in the short rainy season. At 50% (median) probability level, the largest rainsums were 91 mm for the long rainy season and 136 mm for the short rainy season. The short rains were more reliable for crop production than the long rains. The Markov model performed well and gave adequate simulations of the spells and rainsums under semi arid conditions.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K; L. Stroosnijder and R.K. Cherogony. Effect of tillage on infiltration, runoff and erosion of crusting soils in Semi Arid Kenya. Proceedings of the 13th International Congress of Agricultural Engineering (CIGR). Rabat. Morocco.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1998. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.,(1988a). Environmental Degradation and Rehabilitation in Central Baringo, Kenya. In: Land Conservation for Future Generations .S. Rimwanich (Ed.). Proceedings of the 5th International Soil Conservation Conference (ISCO), Bangkok, Thailand. Ja.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1988. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Metto, J.K.; Biamah, E.K; R.K. Cherogony; G.A. Mukolwe (2004). Design of on-farm hydraulic structures for regulating road drainage. Submitted to the 15th International Congress of Agricultural Engineering(CIGR) Conference, Beijing, China. October, 2004.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2004. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop performance and yield. The objective of this study was to stochastically simulate the behaviour of dry and wet spells and rainsums in Iiuni watershed, Kenya. The stochastic behaviour of the longest dry and wet spells (runs) and largest rainsums were simulated using a Markov (order 1) model. There were eight raingauge stations within the watershed. The entire analysis was carried out using probability parameters, i.e. mean, variance, simple and conditional probabilities of dry and rain days. An analysis of variance test (ANOVA) was used to establish significant differences in rainfall characteristics between the eight stations. An analysis of the number of rain days and rainfall amount per rain day was done on a monthly basis to establish the distribution and reliability of seasonal rainfall. The graphical comparison of simulated cumulative distribution functions (cdfs) of the longest spells and largest rainsums showed Markovian dependence or persistence. The longest dry spells could extend to 24 days in the long rainy season and 12 in the short rainy season. At 50% (median) probability level, the largest rainsums were 91 mm for the long rainy season and 136 mm for the short rainy season. The short rains were more reliable for crop production than the long rains. The Markov model performed well and gave adequate simulations of the spells and rainsums under semi arid conditions.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K; L. Stroosnijder; T.C. Sharma; and R.K. Cherogony. Temporal and spatial features of Agricultural drought in Semi Arid Kenya: An analysis of seasonal dry and wet spells as requirements for conservation tillage. Proceedings of the 13th Internati.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1998. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K. and G.K. Maritim (I994d). Sectoral background profiles of arid and semi arid lands of Kenya. Emergency Drought Recovery Programme, Department of Relief and Rehabilitation, Office of the President, Kenya. July, 1994.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1994. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah,E.K.,(1989a). Training Requirements in Soil Conservation for African Countries. Paper presented at the African Network of Scientific and Technological Institutions (ANSTI) annual meeting, University of Ibadan, Nigeria. August, 1989.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1989. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Omuto, T.C., Shepherd, K.D., Walsh, M.G., Coe, R., Biamah, E.K., 2005. Bio-exponential modeling of watershed water retention Characteristics. Paper submitted to European Journal of Soil Science.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2005. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop productivity. Model simulation of the stochastic behaviour of dry and wet spells and rainsums provides some insights into: the differences in rainfall characteristics within an agricultural watershed; and distribution and reliability of seasonal rainfall for various uses. The longest dry spell analysis is of practical relevance to the selection of the best conservation practices (including conservation tillage) for soil and water management whilst the largest rainsum analysis can be used to determine the watershed runoff volume and discharges that would assist in the design of flood and erosion control structures, and the design of runoff water catchment systems (RWCS), which are essential for supplementary irrigation in semi arid Kenya. This study adopted an agro-hydrologic systems approach to the mitigation of agricultural drought at micro, meso and macro scale levels within an agricultural watershed. This approach had its premise that many agricultural drought problems in unstable ecosystems are best solved through farmers interventions at the micro scale level, conservation planning at the meso scale level and resource management at the macro scale level. Thus, the adopted agro-hydrologic systems approach is holistic and aimed at optimizing soil and water management in hydrologically defined geographical areas. The three levels of agricultural drought mitigation should be hierarchical and must consider all factors influencing the hydrologic and hydraulic properties of dominant soils in semi arid Kenya.
KIPNGETICH PROFBIAMAHELIJAH. "Conservation tillage for dryland farming. Proceedings of a Regional/Wor kshop on Conservation Tillage for Eastern and Southern Africa. Supported by RELMA/Sida. Gitau. A.N. and E.K. Biamah (2000). Influence of selected tillage operations on draft power and.". In: Bloemfontein, South Africa. Kisipan, M.L.; 2000. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah. E.K. C.K.K. Gachene, P.T. Gicheru and R.K.K. Cherogony (1994g). Crop response to tillage and residue mulching practices in a clay soil. In Soil Tillage for Crop Production and Protection of the Environment Proceedings of 13th International Soil Ti.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1994. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Thomas, D.B.;and E.K. Biamah (1991). Origin, Application and Design of the Fanya Juu Terrace. In: Development of Conservation Farming on Hillslopes. W.C. Moldenhauer, N. W. Hudson, T. C. Sheng and San Wei Lee (Eds). Soil and Water Conservation Society, An.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1991. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Stroosnijder, L., Omuto, C.T., 2005. Watershed Conservation in Semi-arid Kenya. Paper accepted for publication by Physics and Chemistry of the Earth Journal (but yet to receive official communication), an Elsevier Science Publication.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2005. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop productivity. Model simulation of the stochastic behaviour of dry and wet spells and rainsums provides some insights into: the differences in rainfall characteristics within an agricultural watershed; and distribution and reliability of seasonal rainfall for various uses. The longest dry spell analysis is of practical relevance to the selection of the best conservation practices (including conservation tillage) for soil and water management whilst the largest rainsum analysis can be used to determine the watershed runoff volume and discharges that would assist in the design of flood and erosion control structures, and the design of runoff water catchment systems (RWCS), which are essential for supplementary irrigation in semi arid Kenya. This study adopted an agro-hydrologic systems approach to the mitigation of agricultural drought at micro, meso and macro scale levels within an agricultural watershed. This approach had its premise that many agricultural drought problems in unstable ecosystems are best solved through farmers interventions at the micro scale level, conservation planning at the meso scale level and resource management at the macro scale level. Thus, the adopted agro-hydrologic systems approach is holistic and aimed at optimizing soil and water management in hydrologically defined geographical areas. The three levels of agricultural drought mitigation should be hierarchical and must consider all factors influencing the hydrologic and hydraulic properties of dominant soils in semi arid Kenya.
KIPNGETICH PROFBIAMAHELIJAH. "Simulation of watershed peak runoff discharge using the Nash model Submitted to Discovery and Innovation, Journal of the African Academy of Sciences, Nairobi, Kenya.". In: Bloemfontein, South Africa. Kisipan, M.L.; 2001. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Gikonyo. J.K. and E.K. Biamah (1995a) The influence of upward soil water flux on soil moisture in the potential crop rooting zone of a fluvisol in Kapsengere. Kenya. Journal of Discovery and innovation, The African Academy of Sciences. Nairobi. 7(3): pp 2.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1995. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.,(1992b). Production Oriented Conservation Strategy for developing sustainable projects in Arid and Semi Arid Areas of Kenya. In: People Protecting their Land. Proceedings of the 7th International Soil Conservation Conference (ISCO), Sydney, A.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1992. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.,(1984). Soil and Water Conservation in Kenya; Concepts and Practices Unpublished Manuscript, Nairobi, Kenya.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1984. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Sterk, G., 2005. Influence of land use changes on watershed runoff volume: Application of AGNPS model in Iiuni watershed, Kenya. Paper accepted for publication by Euro Asian Journal of Applied Sciences.". In: Wageningen University and Research Centre Publication. ISBN 90-6754-861-8. Also published as thesis (2005) by Wageningen University, ISBN 90-8504-178-3. Kisipan, M.L.; 2005. Abstract
In semi arid Kenya, episodes of agricultural droughts of varying severity and duration occur. The occurrence of these agricultural droughts is associated with seasonal rainfall variability and can be reflected by seasonal soil moisture deficits that significantly affect crop productivity. Model simulation of the stochastic behaviour of dry and wet spells and rainsums provides some insights into: the differences in rainfall characteristics within an agricultural watershed; and distribution and reliability of seasonal rainfall for various uses. The longest dry spell analysis is of practical relevance to the selection of the best conservation practices (including conservation tillage) for soil and water management whilst the largest rainsum analysis can be used to determine the watershed runoff volume and discharges that would assist in the design of flood and erosion control structures, and the design of runoff water catchment systems (RWCS), which are essential for supplementary irrigation in semi arid Kenya. This study adopted an agro-hydrologic systems approach to the mitigation of agricultural drought at micro, meso and macro scale levels within an agricultural watershed. This approach had its premise that many agricultural drought problems in unstable ecosystems are best solved through farmers interventions at the micro scale level, conservation planning at the meso scale level and resource management at the macro scale level. Thus, the adopted agro-hydrologic systems approach is holistic and aimed at optimizing soil and water management in hydrologically defined geographical areas. The three levels of agricultural drought mitigation should be hierarchical and must consider all factors influencing the hydrologic and hydraulic properties of dominant soils in semi arid Kenya.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Sharma, T.C., Stroosnijder, L., 2002. Simulation of watershed peak runoff rate using the Nash Model. JEAE 2 (1) 49-56.". In: Bloemfontein, South Africa. Kisipan, M.L.; 2002. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K and R.K. Cherogony(1997). Runoff water management technologies for dryland agriculture in arid and Semi arid lards. Proceedings of the International Symposium on Sustainable Farming Systems for Dryland Agricultural in North West China. Yanglin.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1997. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K. and R.K. Cherogony (1994a). Djabia rainwaterharvesting system for domestic water supply in Lamu, Kenya. In: Proceedings of the 6th International Conference on Rainwater Catchment Systems held in Nairobi, Kenya. August, 1993.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1994. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K.,(1986). Environmental Degradation and Conservation within the Njemps Flats and Tugen Plateau Areas of Central Baringo, Kenya. December,1986. Unpublished Report.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1986. Abstract
This paper reviews some research studies on tillage methods influencing soil and moisture conservation in the eastern African countries of Kenya, Tanzania, Malawi and Ethiopia during the past four decades. Most of these studies were conducted in marginal rainfall (semi arid ) areas and on shallow soils of various textures (sandy clay loam, sandy clay, clay and loam). The studies were meant to establish the effects of tillage and residue management practices on physico-chemical soil properties (i.e. structure, bulk density, soil moisture and organic matter contents), runoff and infiltration. This review emphasizes the importance of appropriate tillage and residue management methods (contour bunds and terraces, minimum tillage, tied ridging, mulching and conventional tillage) in providing soil conditions favourable for soil moisture conservation and subsequent crop performance and yield on smallholder farms.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K., Sterk, G., Stroosnijder, L. 2003. Hydrological effects of tillage and farmyard manure on crusting and compacting soils in semi arid Kenya. p 150-158. In: Tullberg, J., Hoogmoed, W. (Eds.), Soil management for sustainability, Proceedings of 1.". In: The University of Queensland, Brisbane, Australia. ISBN 0-646-42496-3. Kisipan, M.L.; 2003. Abstract
In semi arid Kenya, the most dominant soil types are of limited agricultural productivity due to crusting and compaction. The occurrence of soil crusting and compaction is attributed to seasonal rainfall characteristics, physical soil properties and bad tillage practices. Soil crusting and compaction decreases rainwater infiltration and increases surface runoff. Increased and concentrated surface runoff water flow causes severe soil erosion. The objective of this study was to examine the hydrological effects of different tillage practices with and without farmyard manure on infiltration, surface runoff and soil loss of crusting and compacting soils under field and laboratory conditions in semi arid Kenya. Field investigations on infiltration, soil moisture, surface runoff, soil loss, soil bulk density and soil shear strength covered two rainy seasons (short and long rains) and were done on a Chromic Luvisol. The field treatments were zero and conventional tillage, and two farmyard manure applications (5 and 10 Mg/ha). Laboratory investigations on infiltration, time to runoff, surface runoff, soil loss and penetration resistance were conducted under simulated rainfall on four Luvisols for sixty days with the same farmyard manure (5 and 10 Mg/ha) treatments. A regression analysis and a one way ANOVA revealed significant (P<0.05) differences between soil types and treatments. The results obtained showed significant effects of conventional and zero tillage and farmyard manure on infiltration and soil moisture, time to runoff, surface runoff and soil loss. Soil crusting and compaction significantly influenced the hydrological responses of all soil types and treatments. These responses were attributed to seasonal rainfall events of varying amounts, intensities and duration and treatment differences in soil surface conditions and aggregation. Farmyard manure (FYM) application enhanced infiltration and reduced soil crusting and compaction, and surface runoff during the initial stages of the rainy season. But in the mid-stages of the rainy season, the effects of FYM on soil aggregation diminished and resulted in an increase in soil loss. At the end of the rainy season, when soil crusts had formed, some significant decrease in soil loss with FYM treatments was observed. Conventional tillage without farmyard manure led to high surface runoff and soil loss in these structurally unstable soils. Zero tillage performed poorly under these soil conditions because of high soil crusting and compaction, low rainwater infiltration and subsequent increase in surface runoff.
KIPNGETICH PROFBIAMAHELIJAH. "Biamah, E.K and A.R. Oduor. Soil, Water and Nutrient Management in China: An assessment of environmental degradation, conservation farming strategies and management options for Dryland Agriculture. Unpublished Manuscript.". In: Bloemfontein, South Africa. Kisipan, M.L.; 1998. Abstract

In semi arid Kenya, the occurrence of flush floods and soil erosion on agricultural watersheds is attributed to intense rainstorm events of short duration. Thus when agricultural watersheds have no erosion control structures in place, the generation of direct runoff would increase with cultivation. Of the two components of runoff namely, runoff volume and peak runoff discharge, the consideration of peak runoff discharge rate is critical to the design of effective hydraulic structures for controlling floods and soil erosion. In order to accurately predict a watershed's peak runoff discharge, it is important to select a model that is deterministic and yet simple to use. The model should be able to consider the time distribution of runoff response as influenced by Watershed characteristics. The time to peak runoff discharge is largely influenced by the time of concentration. The time of concentration depends on the shape, size and relief of the watershed. In Iiuni Watershed, the Nash model, a parsimonious deterministic model, was selected to predict peak runoff discharges. This model uses the instantaneous unit hydrograph principle to simulate the direct runoff hydrographs and estimate peak runoff discharge. The Nash model was applied using input parameters derived from the watershed's rainfall-runoff characteristics. The results obtained showed that the Nash model was good in predicting peak runoff discharges. This statistic of comparison, R2 (coefficient of efficiency) for the model was above 70% for the model which is indicative of good model prediction of peak runoff discharge (Nash and Sutcliffe, 1970). From this analysis, the Nash model is recommended for the estimation of peak runoff discharge from un-gauged agricultural watersheds in Kenya.

Kiplagat S. "Comparison of Two Communities Living with the Cyclone Risk in Madagascar .". In: The Annual British Psychology Society Conference. Belfast, Northern Ireland; 1999.
Kiplagat S. PhD Thesis on the Psychology of Natural Disasters. Guildford: University of Surrey; 2001.
Kiplagat D. DATA CAPTURE MODEL FOR UTILITY PROVIDERS USING HAND HELD DEVICES VIA MOBILE NETWORK: CASE FOR NAIROBI WATER COMPANY. Orwa DD, ed. Nairobi: University of Nairobi; 2008. Abstract

Utility providers faces a major task of collecting data from their remote installations. In order to be more efficient there is a growing need to reengineer there operations to make them more efficient, effective and customer focused while reducing the cost of operation both in terms of personnel involved, time and the actual operational costs. With the current emergence of 3G networks in wireless network there is need for this companies to look closely at mobile computing as the most cost effective solution to fixing there problems.

This research project mainly targeted the utility providers and the focus was to come up with a cost effective, secure, usable, adaptable, portable and above all extensible mobile data collection model that can be combined with other e-enabling technologies to create a holistic system for utility providers to reengineer their current business processes to make them more efficient and effective thereby improving on customer perception.

Using the WAP model has the preferred technology, this research as added to the voices of WAP proponents who have been suppressed by the opponents by proposing a solution to solve the current major problem of WAP, lack of end to end security which its opponents have used has a weapon to discredit the WAP technology. This has been done by using the kannel Gateway which can be configured within the web server of the organization hence no need of an external provider.

This research as shown that there is actually no need to acquire other devices to enhance meter reading. The mobile phones can be used to achieve a lot. If the recommended further work can be pursuit it can be seen that the capabilities of mobile phones are enormous and can actually transform the way companies conduct their business.

Kiplagat S. "Gender - Differences in Direction - Giving: Innate or the Result of Experience?". In: The Inter - University Postgraduate and U ndergraduate Psychology Conference. Southampton, UK; 1996.
Kiplagat S. Climate Change in the Kenyan Context: Description, impact an way forward. Nairobi: Tegemeo Institute; 2007.
Kiplagat AK;, Mburu J;, Mugendi DN. "Consumption of non timber forest products (NTFPs) in Kakamega forest, Western Kenya: accessibility, role and value to resident rural households."; 2008. Abstract

Dependency on natural resources in the ‘commons’ still ranks very high among rural communities in many developing countries. Kakamega forest in Kenya is one example of a local ‘common’ that supports a huge rural population. The forest is a high biodiversity area and for generations has been an important source of local people’s livelihoods. The forest is managed by three distinct organizations. The objective of this paper is to investigate the importance of Kakamega forest as a ‘common resource’ to surrounding households for nontimber products (NTFPs) such as firewood, herbal medicines, pastures and thatch grass for construction and maintenance of shelters by estimating economic value accruing to each household using direct pricing (DPM) and cost of collection (CoC) methods. Results are derived from a survey of 201 randomly selected households that was conducted in October-December 2006. Findings showed existence of a variety of NTFPs that are of great importance to local households’ livelihoods. Extraction challenges emanating from the different management approaches of the forest were also evident. The study makes a number of conclusions that can inform policy geared to fostering of collaborative management arrangements that can optimize conservation and sustainable use of Kakamega forest.

Kiplagat D. STRATEGY FOR THE IMPLEMENTATION AND ADOPTION OF E-PROCUREMENT IN KENYA PUBLIC SECTOR. Wausi D, ed. Nairobi: University of Nairobi; Forthcoming. Abstract

There is strong consensus among researchers and practitioners regarding the strategic importance of developing efficient purchasing techniques to increase transparency and fairness, reduce corruption, ensure competitiveness and reduce costs. An increasing number of government authorities are adopting e-procurement solutions to reap the above stated benefits (Panayiotou et al., 2004). E-procurement is the process of purchasing goods and services electronically , and can be defined as “the use of integrated (commonly web-based) communication systems for the conduct of part or all of the purchasing process; a process that may incorporate stages from the initial need identification by users, through search, sourcing, negotiation, ordering, receipt, payment and post-purchase review” (Presutti,2003).

In this research proposal I propose to comprehensively study through explorative case study five successful cases of e-procurement in the public sector in Korea, Australia, Italy, Ireland, Philippine's and use their experiences, challenges and strategies employed to come up with a multi-disciplinary framework for the successful implementation and adoption of e-procurement in the public sector in Kenya. In this research critical successes factors (CSFs) and diffusion of innovation theory will be used in the study. Explorative case study and qualitative research design methodology will be used in this research study although aspects on the attitude of the intended users will be analyzed quantitatively.

KIPLAGAT CHEBONSAMMY, Onyari JM, Mulaa F, wabomba J. "Extraction and characterization of gelatin from Lates niloticus and potential industrial applications." Biofarmasi Journal of Natural Product Biochemistry. 2017;15(2):53-64. Abstract

Kiplagat CS, Onyari JM, Mulaa F, Wabomba J. 2018. Extraction and characterization of gelatin from Lates niloticus and potential industrial applications. Biofarmasi J Nat Prod Biochem 16: 53-64. This research aims to extract and characterize gelatin from Lates niloticus (Nile perch) scales, then blend it with polyvinyl alcohol (PVA). Hydrolysis of the scales was done using a crude alkaline protease harvested from a bacterium, Bacillus cereus strain wwcp 1, obtained from Lake Bogoria. The lyophilized solution yielded 16.3% of gelatin powder calculated from the dry weight of the scales. The sample was characterized using infrared spectroscopy and showed peaks at 3442 cm-1, 1653 cm-1 and~ 1590 cm-1 corresponding to Amide A, Amide I and Amide II bands respectively. The amino acid analysis shows that glycine was the most abundant amino acid (21.7%), followed by proline (14.6%) and alanine (11.8%). Isoleucine, Histidine, and Tyrosine were the least abundant (1.8, 1.4 and 0.9% respectively). Polyvinyl alcohol-gelatin blend films of various compositions ranging from 10% to 90% PVA were prepared by solution casting method. Differential Scanning Calorimetry (DSC) and Thermo-gravimetric Analysis (TGA) tests showed the films had glass transition, melting and thermal decomposition onset temperatures intermediate between those of the respective individual polymers (PVA and gelatin). The thermal stability of the films reduced with the increase in the amount of the less thermally stable constituent. Lastly, potential applications of the prepared blend films were investigated. Batch experiments to assess the potential of the polymer blend …

Kiplagat AK;, Mugendi D;, Mburu J. "Valuation of the Economic Role of NTFPs Consumption by Rural Households Living Around Kakamega Forest, Western Kenya."; 2007. Abstract

Rural households greatly depend on non-timber forest products (NTFPs) to sustain livelihoods, more so in meeting household basic daily needs. Specifically in Kakamega forest households depend on NTFPs such as firewood to meet household energy needs, herbal medicines for ailment treatment, pastures to feed household stock, thatch grass to maintain shelters, and fruits and vegetables for food. Since these direct products are obtained from the forest free of charge and have no efficient market, their economic contribution to rural household economy remains unknown yet their role is factually immense. Establishing the economic value of NTFPs consumed by households therefore becomes very necessary in understanding the actual contribution NTFPs make in the sustenance of rural livelihoods. This study estimated and compared economic value of NTFPs consumed by rural households living around Kakamega forest using three valuation approaches namely: substitutes’ prices method direct prices method and opportunity cost of time method. Socioeconomic, institutional and geophysical data that included household characteristics such as age, gender, household sizes, occupations, land and liverstock ownership, NTFPs consumption quantities (and that of coresponding substitutes), time expended on extraction, time values, prices of NTFPs (and the substitutes)on local retail markets, distances to the forests and forest management regimes were collected in the areas surrounding Kakamega forest using a semi-structured questionnaire. Results show that the substitute value is highest followed by directly priced value and lastly by the value generated through the opportunity cost of time, with an annual average consumption of US $120, US$92 and US$78, respectively, per household. The paper concludes with important policy recommendations for conservation of Kakamega forest.

Kipkosgei LK;, Akundabweni LSM;, Hutchinson MJ. "The effect of farmyard manure and nitrogen fertilizer on vegetative growth, leaf yield and quality attributes of Solanum villosum (Black nightshade) in Keiyo district, rift valley."; 2003. Abstract

The African Leafy Vegetables (ALVs) are particularly important as adjunct accompaniment to the staple cereal foods such as the East African corn meal (ugali). In order to increase productivity and utilization of these ALVs, there is needed to develop suitable agronomic practices suited for farmers in specific agro-ecological zones. A study was carried with an objective of determining the effects of various levels of Farmyard manure and Calcium Ammonium nitrate (CAN) on vegetative growth, yield and quality (Vitamins A & C, Nitrates) of Solanum villosum in Keiyo district, between long rains and short rains of Year 2002. Effect of prolonged cooking by the Keiyos on vitamin A and C as well as anti-nutrient (nitrate) content of this vegetable was also determined. The experimental layout was a RCBD with four replicates. The treatments were four levels of organic manure (5, 10, 15, 20 t/ha) and four rates of nitrogen fertilizers (100, 200, 300, 400 kg/ha). The addition of various rates of organic and inorganic fertilizers that were tested significantly improved vegetative growth and increased leaf yields of Solanum villosum (p<0.05). The yields obtained from plants grown with organic manure were generally higher than from those with inorganic fertilizers. The incorporation of either organic or inorganic fertilizer increased Vitamin A content especially in older (14 week) tissues during both seasons. The organic manures at high levels (20t/ha) increased, while application of C.A.N at 200-400 kg/ha decreased Vitamin C content in both young and older tissues. During the first season, application of both organic and inorganic fertilizers decreased the accumulation of nitrates in young tissues. Traditional methods of boiling the ALV’s for long significantly reduced vitamin A and C and nitrates content. In all experiments, the farmer’s crop, though better than the controls, were comparable to low fertilizer levels, in all attributes determined. In conclusion the quality attributes of Solanum villosum was influenced, significantly, by the kind and rate of fertilizer applied, the season of growth, plant age, farmer’s agronomic practices as well as cooking.

Kipkorir A, Onyatta JO, Yusuf AO. "Removal of Fluoride Ions from Aqueous Solution Using Water Hyacinth Biomass as a Low-Cost Adsorbent." Elixir International Journal. 2017;110:48158-48161.
Kipkorir CA, John W. Kimenju, Emmanuel S. Ariga, Kariuki GM, Omondi CO. "Reaction of Sugarcane Genotypes to Root-knot Nematodes (Meloidogyne spp.) in Kenya." International Journal of Agricultural Policy and Research . 2015;3 (5):213-221.
Kipkogei O, Bhardwaj A, Kumar V, Ogallo LA, Opijah FJ, Mutemi JN, Krishnamurti TN. "Improving multimodel medium range forecasts over the Greater Horn of Africa using the FSU superensemble." Meteorology and Atmospheric Physics. 2016;128(4):441-451. AbstractSpringer Nature

This study makes use of the WMO’s multimodel data set called THORPEX integrated grand global ensemble (TIGGE) towards the construction of multimodel superensemble forecasts covering a period of 10 days. The goal of this study is to explore the forecast skill for precipitation forecasts over the Greater Horn of Africa (this is a consortium of 11 countries). The multimodels include forecast data set from a suite of models that include: The European Centre for Medium Range Weather Forecasts (ECMWF), the National Centre for Environmental Prediction (NCEP), the Center for Weather Forecast and Climatic Studies (CPTEC) and the United Kingdom Meteorological Office (UKMO). After performing a training phase for the superensemble weights covering the previous 450 days of October, November and December months of 2008–2012, forecasts of precipitation were prepared for the multimodel

Kipkoech, D. N.;, Ng’anga NW;, Kabira JN;, Abong GO;, Nderitu JH. "On‐farm seed potato storage practices in Kenya: A case study of Nyandarua."; 2012.
Kipkoech, D. N.;, Ng’anga NW;, Kabira JN;, Abong GO;, Nderitu JH. "On‐farm seed potato storage practices in Kenya: A case study of Nyandarua."; 2012.
KIPKEMOI TOWETPHILEMON. "Stimulation of mu and delta opioid receptors induces hyperalgesia while stimulation of kappa receptors induces antinociception in the hot-plate test in the naked mole-rat (Heterocephalus glaber). ." Brain Research Bulletin. 2006;71:60-68. AbstractScienceDirect

Abstract
The antinociceptive effects of highly selective mu (DAMGO), delta (DPDPE) and kappa (U-50488 and U-69593) opioid agonists were evaluated following intraperitoneal (i.p.) administration in the naked mole-rat. A hot plate test set at 60 °C was used as a nociceptive test and the latency to the stamping of the right hind paw (response latency) was used as the end-point. DAMGO (5–10 mg/kg) and DPDPE (2.5–5 mg/kg) caused a naloxone-reversible significant decrease in the mean response latency. Subcutaneous injection of naloxonazine (20 mg/kg) 24 h prior to the administration of DAMGO (5 mg/kg) also blocked the reduction in the response latency observed when DAMGO was injected alone. On the contrary, U-50488 (2.5–5 mg/kg) or U-69593 (0.08 or 0.1 mg/kg) caused a naloxone-reversible significant increase in the mean response latency. These results showed that activation of mu or delta receptors caused hyperalgesia, whereas activation of kappa receptors caused antinociception in the hot plate test in naked mole-rat. This suggests that mu and delta receptors modulate thermal pain in a different way than kappa receptors in the naked mole-rat. It is not possible at the moment to point out how they modulate thermal pain as little is known about the neuropharmacology of the naked mole-rat.

Kipkemoi TP;, Wambugu SN;, Joakim D;, Kiama SG;, Kanui TI. "Laboratory management of captive hingeback tortoises."; 2007.
KIPKEMOI TOWETTPHILEMON, IKUSYA KANUITITUS. "Hyperlgesia following administration of morphine and pethidine in the root rat (Tachoryctes splendens)." Journal of Veterinary Pharmacology and therapeutics 18 (1995) 68. 1995;18(1):68-71.Wiley online Library
KIPKEMOI DRTOWETPHILEMON. "Wambugu, S.N., Kanui, T.I., Towett, P.K., Kiama, S.G., Abelson, K. The formalin test and capsaicin instillation in the Marsh Terrapin (Pelomedusa subrufa). In the 5th International Congress of the African Association of Physiological Sciences (AAPS), 2008." 2008; 2008. Abstract

Samples of burnt clay from kilns in various parts of the country were tested for their cementatious qualities and found to have high silica contents.Results showed that additing upto 40% of the cly to portland cement produced good binders for mass concre and plaster work,particularly for low cost housing.

Kipkemoi TP;, Wambugu SN;, Joakim D;, Kiama SG;, Kanui TI. "Laboratory management of captive hingeback tortoises."; 2007.
KIPKEMOI TOWETTPHILEMON, Kanui TI. " Effects of Pethidine, Acetylsalicylic acid and Indomethacin on pain and behaviour in the naked mole-rat." Pharmacology Biochemistry and Behaviour . 1993;45:153-159. AbstractScienceDirect

The antinociceptive and behavioral effects of pethidine (10, 20, or 30 mg/kg), acetylsalicylic acid (200, 400, or 600 mg/kg) and indomethacin (20, 40, or 50 mg/kg) in the naked mole-rat was studied in the hot-plate test. Instead of inducing analgesia, pethidine caused a dose-dependent reduction in response latency. Sensorimotor impairment and aggressive behavior were also observed following administration of pethidine (20 or 30 mg/kg). All animals recieving pethidine (30 mg/kg) died following fighting when kept in colony cages. Aggressive behavior and death was prevented by naloxone or by keeping animals in single cages. Acetylsalicylic acid (600 mg/kg) and indomethacin (40 or 50 mg/kg) caused a significant increase in response latency. It is concluded that in the mole-rat pethidine elicits aggression, sensorimotor impairment, and apparent hypergesia.

KIPKEMOI DRTOWETPHILEMON. "Wambugu, S.N., Joakim, D., Towett, P.K., Kiama, S.G. and Kanui, T.I. Laboratory management of captive hingeback tortoises. Workshop on Reptile Care, Health and Welfare, 2007.". In: Presented at the Commonwealth Association of Surveying and Land Economy (CASLE) and the International Federation of Surveyors (FIG) Seminar, Harare,. 2008; 2007. Abstract
Samples of burnt clay from kilns in various parts of the country were tested for their cementatious qualities and found to have high silica contents.Results showed that additing upto 40% of the cly to portland cement produced good binders for mass concre and plaster work,particularly for low cost housing.
Kipkemoi TP;, Wambugu SN;, Joakim D;, Kiama SG;, Kanui TI. "Laboratory management of captive hingeback tortoises."; 2007.
Kipchirchir IC. "An Analysis of Sequential Sampling Strategy in Pest Control Based on Negative Binomial Distribution." ICASTOR Journal of Mathematical Sciences. 2011;5(2):217-228.
Kipchirchir, Koech O, Wahome RG. "Use of Dry Land Tree Species (Prosopis juliflora) Seed Pods as Supplement Feed for Goats in the Arid and Semi Arid Lands of Kenya.". 2011. Abstract

Abstract: This study was conducted to determine the potential of incorporating Prosopis juliflora seed pods into typical dry land livestock production systems to minimize feed scarcity during the dry seasons and avoiding weight losses and poor performance. The study evaluated supplementation of weaner Galla goats with increasing amounts of Prosopis juliflora seedpods that is widely distributed in arid and semi arid areas of Kenya. This species is drought tolerant and with high productivity of seed pods whole year round. The overall aim of this study was therefore, to assess the feasibility of incorporating P. juliflora seedpods into a typical dry land livestock production system. The study further sought to find out the optimum supplementation level for improved performance. The experiment involved 20 weaner Galla goats of similar age (6 months) and weights (11-14 kg) which were randomly assigned to four treatments of 5 weaners each. The treatments were No P. juliflora (PJP0), 100 g/goat/day P. juliflora (PJP100), 200 g/goat/day P. juliflora (PJP200), 400 g/goat/day P. juliflora (PJP400). Supplementation involved providing the goats with their respective diets in the morning before mixed species range grass hay was offered as basal diet. The animals were weighed on weekly basis and weight gains calculated as difference in previous week’s weight and current week’s weight. The experiment lasted for 70 days. Overall, all the treatment groups exhibited higher average weekly weight gains than the control group throughout the experimental period. However, for the first 3 weeks, this was not statistically significant (p<0.05). From the 5th week up to the 10th week, there was significant difference (p<0.05) in the growth rates for the treatments except for the control group. Overall, treatment PJP200 exhibited highest total weight gain (3.960c) followed by PJP400 (2.700 kg). Group PJP0 had the lowest weight gain by the end of the experiment. The supplemented groups showed good weight gains, body condition and retained nitrogen levels compared to the un-supplemented groups

Kipchirchir IC. "The Versatility of the Negative Binomial Distribution in Describing Dispersion." ICASTOR Journal of Mathematical Sciences. 2011;5(1):65-78.
Kipchirchir IC. "COMPARATIVE ANALYSIS OF THE EFFECT OF DISPERSION AND COMPETITION ON POPULATION SUSTAINABILITY." ADVANCES AND APPLICATIONS IN STATISTICS. 2017;51(1):17-38. AbstractWebsite

In this paper, dispersion, population dynamics and competition which are typical characteristic ecological properties of a population are discussed. In particular, a comparative analysis of the effect of dispersion (overdispersion and randomness) and competition (contest and scramble) on sustainability of a single species population is considered. Population sustainability by the environment is captured by the carrying capacity of the environment which is also the equilibrium of the population. In the study, the comparative analysis is restricted to positive growth of a single species population and a stable equilibrium. The results indicate that overdispersed (clustered) population contest for resources whereas random population scramble for resources. The comparative analysis established that population sustainability of overdispersed population characterized by contest competition is more than three times population sustainability of random population characterized by scramble competition.

Kipchirchir KO, Ngugi RK, Karuku G, Wanjogu R, Mureithi SM. "Effect of varied soil moisture content on seed yield of six range grasses in the rangelands of Kenya." Universal Journal of Agricultural Research . 2014;2(5)(1):174-179.
Kipchirchir KO, Ngugi KR, Wahome RG. "Use of Dry Land Tree Species (Prosopis juliflora) Seed Pods as Supplement Feed for Goats in the Arid and Semi Arid Lands of Kenya." Environmental Research Journal. 2011;5(2):66-73. AbstractWebsite

This study was conducted to determine the potential of incorporating Prosopis juliflora seed pods into typical dry land livestock production systems to minimize feed scarcity during the dry seasons and avoiding weight losses and poor performance. The study evaluated supplementation of weaner Galla goats with increasing amounts of Prosopis juliflora seedpods that is widely distributed in arid and semi arid areas of Kenya. This species is drought tolerant and with high productivity of seed pods whole year round. The overall aim of this study was therefore, to assess the feasibility of incorporating P. juliflora seedpods into a typical dry land livestock production system. The study further sought to find out the optimum supplementation level for improved performance. The experiment involved 20 weaner Galla goats of similar age (6 months) and weights (11-14 kg) which were randomly assigned to four treatments of 5 weaners each. The treatments were No P. juliflora (PJP0), 100 g/goat/day P. juliflora (PJP100), 200 g/goat/day P. juliflora (PJP200), 400 g/goat/day P. juliflora (PJP400). Supplementation involved providing the goats with their respective diets in the morning before mixed species range grass hay was offered as basal diet. The animals were weighed on weekly basis and weight gains calculated as difference in previous week’s weight and current week’s weight. The experiment lasted for 70 days. Overall, all the treatment groups exhibited higher average weekly weight gains than the control group throughout the experimental period. However, for the first 3 weeks, this was not statistically significant (p<0.05). From the 5th week up to the 10th week, there was significant difference (p<0.05) in the growth rates for the treatments except for the control group. Overall, treatment PJP200 exhibited highest total weight gain (3.960c) followed by PJP400 (2.700 kg). Group PJP0 had the lowest weight gain by the end of the experiment. The supplemented groups showed good weight gains, body condition and retained nitrogen levels compared to the un-supplemented groups.

Kipchirchir IC. "Modelling Dispersion using Finite Mixture of Poisson." Far East Journal of Mathematical Sciences. 2011;56(2):161-178.
Kipchirchir IC. "The Negative Binomial Parameter k as a Measure of Dispersion." ICASTOR Journal of Mathematical Sciences. 2010;4(2):197-207.
Kipchirchir IC. An Age Structured Population Model. Nairobi: Nairobi; 1993.
Kipchirchir IC. "ON GENERALIZED DISTRIBUTIONS: THE POWER OF GENERALISING AND THE POWER SERIES CONNECTION." Far East Journal of Theoretical Statistics . 2019;56(2):151-168 . AbstractWebsite

In this paper, we consider generalised distributions in the context of modelling dispersion but with focus on probability generating function (pgf) which is an important tool in studying statistical properties of a discrete distribution. The aim of this paper is twofold, one is to demonstrate the power of generalising in determination of pgf and two is to show that relationship between power series can naturally lead to pgf of a generalised distribution. Generalised Poisson distributions such as negative binomial, Pólya-Aeppli and Neyman type A are used to model overdispersed (clustered) populations and they all have Poisson as a limiting distribution as contagion breaks down to randomness. In particular, the Pólya-Aeppli distribution served as a typical example in underpinning the inherent power of generalising in determining the pgf. Based on the power series distributions, it is affirmed that negative binomial distribution is a generalised Poisson distribution by utilising the relationship between exponential,

Kipchirchir IC. "On Ultimate Extinction Probabilities and Mean Behaviour of Spatial Patterns." Advances and Applications in Statistics. 2011;25(1):31-45.
KIPCHIRCHIR KO, Kinuthia NR, Githaiga WR. "Use of Prosopis juliflora Seedpod as Livestock Feed Supplement in the Arid and Semi-arid Rangelands of Kenya.". In: Science, Policy and Politics of Modern Agricultural System . Netherlands: Springer ; 2014.book_chapter-springer_netherlands..pdf
Kipchirchir, Koech O, Ngugi K. "Use of Dry Land Tree Species (Prosopis juliflora) Seed Pods as Supplement Feed for Goats in the Arid and Semi Arid Lands of Kenya.". 2011. Abstract

Abstract: This study was conducted to determine the potential of incorporating Prosopis juliflora seed pods into typical dry land livestock production systems to minimize feed scarcity during the dry seasons and avoiding weight losses and poor performance. The study evaluated supplementation of weaner Galla goats with increasing amounts of Prosopis juliflora seedpods that is widely distributed in arid and semi arid areas of Kenya. This species is drought tolerant and with high productivity of seed pods whole year round. The overall aim of this study was therefore, to assess the feasibility of incorporating P. juliflora seedpods into a typical dry land livestock production system. The study further sought to find out the optimum supplementation level for improved performance. The experiment involved 20 weaner Galla goats of similar age (6 months) and weights (11-14 kg) which were randomly assigned to four treatments of 5 weaners each. The treatments were No P. juliflora (PJP0), 100 g/goat/day P. juliflora (PJP100), 200 g/goat/day P. juliflora (PJP200), 400 g/goat/day P. juliflora (PJP400). Supplementation involved providing the goats with their respective diets in the morning before mixed species range grass hay was offered as basal diet. The animals were weighed on weekly basis and weight gains calculated as difference in previous week’s weight and current week’s weight. The experiment lasted for 70 days. Overall, all the treatment groups exhibited higher average weekly weight gains than the control group throughout the experimental period. However, for the first 3 weeks, this was not statistically significant (p<0.05). From the 5th week up to the 10th week, there was significant difference (p<0.05) in the growth rates for the treatments except for the control group. Overall, treatment PJP200 exhibited highest total weight gain (3.960c) followed by PJP400 (2.700 kg). Group PJP0 had the lowest weight gain by the end of the experiment. The supplemented groups showed good weight gains, body condition and retained nitrogen levels compared to the un-supplemented groups

Kipchirchir IC. "Comparative Analysis of Dispersion Models." Advances and Applications in Statistics. 2013;37(1):13-35.
Kipchirchir IC. "An Approximation of the Fisher’s Information for the Negative Binomial Parameter k." Far East Journal of Theoretical Statistics. 2011;34(2):129-138.
Kipchirchir IC. "ESTIMATINGAN EXPONENTIALLY DECAYINGFUNCTION OF RATE PARAMETER OF APOISSON PROCESS." Advances and Applications in Statistics. 2020;6(1):1-17. AbstractWebsite

In this paper, we consider point estimation of an exponentiallydecaying function of rate parameter of Poisson process usingdiscrete (increments) and continuous (interarrival times) variablesundermaximum likelihood and minimum variance paradigms. It isfound that for increments, momentsof estimators are in terms ofelementary function-the exponential function whereas for interarrivaltimes, moments of estimators are in terms of special functions-modified Bessel function ofthethirdkind for maximum likelihoodestimators and confluent hypergeometric function for the uniformlyminimum variance unbiased estimators. Behaviourally, the momentsmirror the exponentially decaying function of. The maximumlikelihood estimators are biased, however, it is found thatasymptoticunbiasedness forfixedn wheren is the sample size corresponds to a

Kipchirchir KO, Ngugi RK, Karuku G, Wanjogu R, Mureithi SM. "Effect of different soil water content and seed storage on quality of six range grasses in the semi-arid ecosystems of Kenya." Environment and Ecology Research . 2014;2(2)(1):261-271.
Kioy PG. Electrophysiological Study Of Diabetic Autonomic And Sensorimotor Polyneuropathy.; 1984. Abstract

Neurological complications of Diabetes Mellitus were
looked for in a group of 31 patients using clinical examination
and electrophysiological tests. Clinically evident sensorimotor
neuropathy was found to be prsent in 41.9% and clinical
autonomic neuropathy in 15% of the patients. Electrophysiological
tests showed evidence of sensorimotor neuropathy in 80% and
autonomic nerve dysfunction in 35% of the same patients. Autonomic
neuropathy was found to occur always in association with
sensorimotor neuropathy.
The electrophysiological tests were found to be convenient
as they were easy, and required little cooeration from the patient.
Sensory nerve tests were found to be more sensitive than motor
nerve tests alone and the yield of anyone test was found to
increase the more nerves one examined. Electrocardiographic tests
for autonomic neuropathy ( i.e. 'beat to beat variation' of pulse
rate and the 'valsalva ratio' ) were found to be of equal
sensitivity, but the former was easier to carry out and is
therefore recommended. The use of postural blood pressure changes
to assess autonomic nerve function was found to be too insensitive
for any practical use. When postural hypotension is present, other
signs of neuropathy are usually grossly evident.

Kioko P.M., Olang’ P. MCCT. "The incidence and risk factors for intra-operative hypothermia among paediatric patients at The Kenyatta National Hospital." East African Medical Journal. 2013;90(10):181-187.
KIOKO MRMUSINGIJOHN. "Musingi J.K.: Reversing the vicious cycle of poverty, environmental degradation: Proceeding in a seminar held on 5th May, 2003, Silver Springs Hotel: Centre for Training and Research in Arid lands Development (CETRAD).". In: Proceeding in a seminar held on 5th May, 2003, Silver Springs Hotel: Centre for Training and Research in Arid lands Development (CETRAD). North . CETRAD; 2003. Abstract
The  study found out that Masinga Dam has adversely affected the public health in the communities around the dam. malaria was the most prevalent ailment followed by typhoid fever. Bilharzia has also increased since the dam was constructed.
KIOKO MRMUSINGIJOHN. "Explore Geography Book Form I: Teacher.". In: Publishers . Longman Kenya; 2003. Abstract
The  study found out that Masinga Dam has adversely affected the public health in the communities around the dam. malaria was the most prevalent ailment followed by typhoid fever. Bilharzia has also increased since the dam was constructed.
Kioko UM, Menon V, Ally M, Forsythe S. "Costs and Impacts of Scaling Up Male Circumcision in Tanzania.". In: Washington, DC: Futures Group, USAID | Health Policy Initiative, Costing Task Order.; 2012.
Kioko UM. "The economic impact of malaria on wage earnings in Kenya: a household level investigation." nternational Journal of Education and Research. 2013.
KIOKO MRMUSINGIJOHN. "Musingi J.K.: Relationship between Optimality, Sustainability, and survivability of environmental Capital: Proceeding in a seminar held on 5th May, 2003, Silver Springs Hotel: Centre for Training and Research in Arid lands Development (CETRAD). North.". In: Proceeding in a seminar held on 5th May, 2003, Silver Springs Hotel: Centre for Training and Research in Arid lands Development (CETRAD). North . CETRAD; 2003. Abstract
The  study found out that Masinga Dam has adversely affected the public health in the communities around the dam. malaria was the most prevalent ailment followed by typhoid fever. Bilharzia has also increased since the dam was constructed.
Kioko UM, Guthrie T, Lara G, Sumbana H, Phororo H, Kerapeletswe C, Fairstein C, Valdes A, Sotomayor J, Darce D. Funding the fight: Budgeting for HIV/AIDS in Developing Countries. ISBN 1-919798-71-4, . Idasa, Cape Town; 2004.
KIOKO MRMUSINGIJOHN. "Musingi J.K.: Reversing the vicious cycle of poverty, environmental degradation:.". In: Proceeding in a seminar held on 5th May, 2003, Silver Springs Hotel: Centre for Training and Research in Arid lands Development (CETRAD). CETRAD; 2003. Abstract
The  study found out that Masinga Dam has adversely affected the public health in the communities around the dam. malaria was the most prevalent ailment followed by typhoid fever. Bilharzia has also increased since the dam was constructed.
Kioko UM, Njeru ENH. The Impact of HIV/AIDS on Primary Education in Kenya ISBN 9666-948-16-3. Institute of Policy Analysis and Research (IPAR) . ISBN 9666-948-16-3. Institute of Policy Analysis and Research (IPAR); 2003.
KIOKO MRMUSINGIJOHN. "Explore Geography Learner.". In: Publishers . Longman Kenya; 2004. Abstract
The  study found out that Masinga Dam has adversely affected the public health in the communities around the dam. malaria was the most prevalent ailment followed by typhoid fever. Bilharzia has also increased since the dam was constructed.
Kioko UM. "The Economic Burden of Malaria on the Household Income in Kenya." International Journal of Development Studfies (IJDS). 2013.
KIOKO MRMUSINGIJOHN. "Musingi J.K.: Pastoral Vulnerability to drought and conflicts in resources uses between Upstream and downstream water uses case of Ewaso Nyiro River:.". In: Journal of Applied hydrology VOL 8. International Association of Hydrology Journal; 2000. Abstract
The  study found out that Masinga Dam has adversely affected the public health in the communities around the dam. malaria was the most prevalent ailment followed by typhoid fever. Bilharzia has also increased since the dam was constructed.
KIOKO MRMUSINGIJOHN. "Musingi J.K.: Relationship between Optimality, Sustainability, and survivability of environmental Capital:.". In: Proceeding in a seminar held on 5th May, 2003, Silver Springs Hotel: Centre for Training and Research in Arid lands Development (CETRAD). North . CETRAD; 2003. Abstract
The  study found out that Masinga Dam has adversely affected the public health in the communities around the dam. malaria was the most prevalent ailment followed by typhoid fever. Bilharzia has also increased since the dam was constructed.
KIOKO MRMUSINGIJOHN. "Explore Geography Learner.". In: Publishers . Longman Kenya; 2003. Abstract
The  study found out that Masinga Dam has adversely affected the public health in the communities around the dam. malaria was the most prevalent ailment followed by typhoid fever. Bilharzia has also increased since the dam was constructed.
Kioko, Urbanus M.; Njeru EH. "Funding the fight against HIV / AIDS.". 2004.Website
Kioko U. "Economic Burden of Malaria on Subsistence Crop Production in Kenya." International Journal of Education and Research (IJER). 2013.
KIOGORA DRMWORIAJOHN, PROF. KINYAMARIO JENESIOI. "Jane T. Munene, J.I. Kinyamario, N. Holst and JK Mworia Competition between cultivated rice (Oryza sativa) and wild rice (Oryza punctata) in Kenya.African Journal of Agricultural Research Vol. 3 (9), pp. 605-611.". In: African Journal of Midwifery, October 2008 Issue. Intech Open Access Publishers; 2008.
KIOGORA DRMWORIAJOHN. "Mworia JK. 2011. Invasive plant species and biomass production in Savannas. IN: Biomass and Remote Sensing of Biomass. Islam Atazadeh (ed). Intech Open Access Publishers. ISBN 978-953-307-490-0.". In: African Journal of Midwifery, October 2008 Issue. Intech Open Access Publishers; 2011. Abstract
This book addresses a wide array of issues in botany through a series of chapters. The chapters have been contributed by leading botanists from South America, Africa, Europe and
KIOGORA DRMWORIAJOHN. "Mungai DN, Thuita T, Muthee A, Muchemi G, Mworia JK, Oduori G and J. Kimani. 2011. Environmental,social and economic assessment of the fencing of the Aberdare Conservation Area.". In: African Journal of Midwifery, October 2008 Issue. Intech Open Access Publishers; 2011. Abstract
This book addresses a wide array of issues in botany through a series of chapters. The chapters have been contributed by leading botanists from South America, Africa, Europe and
KIOGORA DRMWORIAJOHN. "Mworia JK (Editor).Botany. Intech Open Access Publishers.ISBN 978-953-51-0355-4.". In: African Journal of Midwifery, October 2008 Issue. Intech Open Access Publishers; 2012. Abstract
This book addresses a wide array of issues in botany through a series of chapters. The chapters have been contributed by leading botanists from South America, Africa, Europe and
KIOGORA DRMWORIAJOHN. "Nyariki, D.M., Wasonga, V.O. & Mworia JK. 2009. Ecological, socio-economic and livelihood differentiation of Kenya.". In: African Journal of Midwifery, October 2008 Issue. Intech Open Access Publishers; 2009. Abstract
This book addresses a wide array of issues in botany through a series of chapters. The chapters have been contributed by leading botanists from South America, Africa, Europe and
KIOGORA DRMWORIAJOHN. "Mworia JK, Wambua J.K., Omari, J. K., and J.I. Kinyamario. 2011. Patterns of seed dispersal and establishment of the invader Prosopis juliflora in the upper floodplain of Tana river, Kenya. African Journal of Range and Forage Science 28(1):35-41.". In: African Journal of Midwifery, October 2008 Issue. Intech Open Access Publishers; 2011. Abstract
This book addresses a wide array of issues in botany through a series of chapters. The chapters have been contributed by leading botanists from South America, Africa, Europe and
Kinyuru JN;, Konyole SO;, Kenji GM;, Onyango CA;, Owino VO;, Owuor BO;, Estambale BB;, Friis H;, Roos N. "Identification of Traditional Foods with Public Health Potential for Complementary Feeding in Western Kenya.". 2012. Abstract

The diversity of traditional foods in Kisumu West District of Western Kenya was assessed with an aim to identify the foods with a potential for complementary feeding. Leaves were the most consumed plant part amongst vegetables, while a few fruits were consumed together with their seeds. Amaranthus cruentus L. was found to be consumed as a leafy vegetable while another variety, Amaranthus hybridus L. was found to be consumed as a grain. Four species of winged termites, a grasshopper, black ant and dagaa fish were also identified. Twelve of the traditional foods were found to be associated with nutritional and health benefits as perceived by the locals. Traditional food processing methods such as boiling, fermentation and sun drying were identified. Thus exploitation of the species possessing nutrient, health and processing benefits needs to be explored in complementary feeding.

Kinyungu TN, Muthomi JW, Subramanian S, Miano DW, Olubayo FM’mogi, Maobe MA. "Role of maize residues in transmission of maize chlorotic mottle virus and effect on yield." International Journal of Biosciences. 2019;14( 4): 338-349.Role of maize residues in transmission of maize chlorotic mottle virus and effect on yield
Kinyungu TN, Muthomi JW, Subramanian S, Miano DW, Olubayo FM. "Transmission of viruses causing maize lethal necrosis disease through seed in commercial hybrids and effect on growth in the subsequent crop." Archives of Phytopathology and Plant Protection. 2020;DOI:10.1080/03235408.2020.1826720.
Kinyungu TN, Muthomi JW, Subramanian S, Miano DW, Olubayo FM, Wagura J. "Efficiency of aphid and thrips vectors in transmission of viruses causing maize lethal necrosis disease." World Journal of Agricultural Research . 2018;6(4):144-152.
Kinyungu TN, Muthomi JW, Subramanian S, Miano DW, Olubayo FM’mogi, Maobe MA. "Role of maize residues in transmission of maize chlorotic mottle virus and effect on yield." International Journal of Biosciences. 2019;14(4):338-349.
Kinyua-Njuguna JW, Munyoki DJ, Kibera PF. "INFLUENCE OF INTERNAL ORGANIZATION ALENVIRONMENT ON PERFORMANCE OF COMMUNITY-BASED HIV AND AIDS ORGANIZATIONS IN NAIROBI COUNTY." European Scientific Journal January 2014 edition . 2014;10(1):1857-7431. Abstractinfluence_of_internal_organization_alenvironment_on_performance_of_community_based_hiv_and_aids.pdf

Organizational performance is a key concern for stakeholders in both the profit and non-profit sectors. However, more attention has been focused on profit-making organizations with little emphasis on performance of community-based organizations (CBOs) and other Civil Society Organizations (CSOs) especially those located in sub-Saharan Africa. Theoretically, scholars in management discipline indicate that the internal environment of an organization influences its performance. Thus, performance is dependent on the internal structures and systems existing within an organization. This paper examines the impact of the internal organizational environment on performance of community-based HIV and AIDS organizations in Nairobi County, Kenya. The authors empirically assess the predicted relationship using survey data from 163 Community Based HIV and AIDS Organizations, in Nairobi County, Kenya. The study findings indicate that the internal environment of an organization has an impact on an organization’s effectiveness, efficiency, relevance and financial viability with impacts on the efficiency and relevance performance indicators. This study has important implications for managers of CBOs on the relevance of developing sustainable internal systems and structures within their organizations to enhance performance.

Kinyua A. P., Mbugua J. K., Imwene K.O., Mbui D.N., J.G.N. K, S.O. W, I. M. "Current and voltage data logging from microbial fuel cells using Arduino based sensors." International Robotics & Automation Journal. 2021;7(3):90-93.abstract.pdf
KINYUA PROFMWEASIXTUS. "Osano S N Mwea, S. K (2008), The effect of vegetation roots in slope stability, 2nd Civil Engineering International Conference on Civil Engineering and Sustainable Development held in Mombasa between 25h and 28th September 2008.". In: 1st International Symposium on RE-Orienting Civil Engineering Education and Training held in Mombasa between 25th and 26th September 2008. Longhorn; 2008. Abstract
Kenya experienced extraordinarily heavy rainfall between May 1997 and February 1988 due to the El Nino weather phenomenon. This period of about 10 Months of heavy rainfall caused widespread landslides and floods in various parts of the country. An enormous number of landslides occurred in Central, Western and to the Coast Provinces. This triggered a nation-wide crusade to plant trees in an effort to counter future landslide phenomenon. However, little quantitative research has been conducted to assess the impact of plant roots on soil strength. As a result, planting of trees tend to be more empirical without consideration of the structural measures for reinforcing soil that combine the ecological benefits of vegetation. This paper describes the contribution of plant roots of various species to soil shear strength. Soil samples with roots of various plant species were tested in a large modified direct shear apparatus in a laboratory set-up. Shear stress results of rooted soils were compared with results of soil without roots of similar soil types. The contribution of roots to soil strength was estimated by comparing the difference between the maximum shear stress of the shear-displacement curves obtained for soils with and without roots for the different species tested. Results suggested that the rooted soils contributed more to soil strength than rootless soils. However there was varying degree of shear strength contribution for different root species suggesting that for each species, contribution of shear strength was governed by root density. The results suggested that a composite soil-root system consumes energy while resisting shear displacement. This feature could be included in stability analysis of vegetated hillslopes in terms of energy associated with shearing in a soil-root system.
kinyua OH. QUELLING VIOLENCE. Nairobi: Supreme Cuoucil of Kenya Muslims; 2012.quelling_violence_in_mombasa_.doc
KINYUA PROFMWEASIXTUS. "(1992). Syllabus and regulations for diploma in Civil Engineering, Technical Education Programme Kenya Institute of Education, Nairobi.". In: Discovery and Innovation Vol.8 Number 2 PP 11-131, African Academy of Sciences, Nairobi. Longhorn; 1992. Abstract
 Journal of Civil Engineering, Jomo Kenyatta University of Agriculture and Technology Vol.7 PP
KINYUA DRNGUUEDWARD. "Nguu EK, Osir EO, Imbuga MO, Olembo NK.The effect of host blood in the in vitro transformation of bloodstream trypanosomes by tsetse midgut homogenates.Med Vet Entomol. 1996 Oct;10(4):317-22.". In: Med Vet Entomol. 1996 Oct;10(4):317-22. Kisipan, M.L.; 1996. Abstract
Midgut homogenates prepared from Glossina morsitans morsitans, that had previously been fed on different host blood samples, were tested for their abilities to transform bloodstream Trypanosoma brucei into procyclic (midgut) forms in vitro. Compared to rat and goat blood samples, eland blood had the least capacity to support trypanosome transformation, whereas buffalo blood showed intermediate capacity. Fractionation of rat blood showed the importance of the cellular portion since both rat and eland red blood cells (RBCs) supported the process. Virtually no transformation was observed in rat and eland plasma or serum fractions. Suspending rat blood cells in eland plasma led to a reduction in parasite transformation rates. Further experiments showed that the RBC membranes were also capable of supporting the process. These results clearly show the important role played by blood, especially the red blood cells, in the transformation of bloodstream trypanosomes. In addition, the low transformation rates observed in eland blood is due to an inhibitory factor(s) present in the plasma fraction.
Kinyua AM, Owera-Atepo JB, Juma FD, MANGALA MJ,... Heavy Metal Analysis of Industrial Effluents in Nairobi City. 41.204.161.209; 1990. AbstractWebsite
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KINYUA PROFMWEASIXTUS. "Effect of Ageing of Bitumen of performance of Asphalt pavements in Tropical Environments,.". In: 6th conf. On Asphalt pavements for Southern Africa , Vol. 1 PP 77-95 Cape Townv. Longhorn; 1994. Abstract

Bovine foscioliosis coused by F. giganticais widespread in   There is a large collection of reports of fasciolosis in Kenya based on  abattoir data records from veterinary investigation laboratories (VILS) as well as reports on a few farm study was carried out to improve on the reports. 
Diagnosis of fasciola infection has traditionally been based on detection of typical eggs in the faeces.  A variety of other techniques are now available eg enzyme-linked immunosorbent assay (ELISA), which has shown to be sensitive and useful.
Three agro-ecological zoned were defined depending on the reported prevalence; high risk, medium risk and low risk zones.  Two study districts were picked at random from each zone.  The study farms were selected using the two stage cluster sampling.
Faecal and blood samples were collected on the farm.  Serum was later harvested.  ELISA and faecal sedimatation tests (FST) were carried out.
A total of 2434 faecal and blood samples were screened.  ELISA achieved the highest (66%) positive rate of the samples from Kwale district and the lowest (23%) rate in Nakuru.  An overall positive prevalence of (43%) for fasciolosis was achieved.  The faecal sedimentation test showed prevalence of 19%.  In both tests high prevalence were observed in Kwale and Kilifi districts.  ELSA was always positive when FST was positive but not the converse.
The on-famr survey utilizing two reliable diagnostic tests was meant to improve on existing abattoir reports.  Both tests showed fair to good agreements.  The higher detection by ELISA might be due to deworming and other reasons.  It was concluded that on-farm surveys are better than retrogressive studies; thought the latter are cheaper and faster.,  the current prevalence of fasciolosis are different from past reports with coastal showing higher than expected prevalences.

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