A Review of Some Indices used for Drought Studies

Agwata JF. "A Review of Some Indices used for Drought Studies." Civil and Environmental Research. 2014;Vol.6, No.2.


Droughts are serious extreme events that have adverse effects on the physical environment and water resource
systems in both developed and developing countries. Consequently, there is need for adequate measures for
responding to and mitigating various impacts arising from drought occurrence. The design and implementation
of drought mitigation and response strategies requires an understanding of the various indices that are used to
examine drought both at single site and in an area. In the case of water resources management during critical
drought periods for instance, a means of objectively identifying drought events in terms time and duration of
occurrence, magnitude and severity is required. This is possible only using various indices to characterize
drought. In this paper, some of the key drought indices are reviewed and their strengths and weaknesses

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