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Home  >  Volume 34

Recent Investigation of Drought Severity in Southern Part of Nigeria by Adeniyi M.O and Uzoma E. K (pages 177-187)
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Abstract

The tremendous impacts of climate change such as devastating flooding, deforestation, erosion and drought are becoming more increasingly evident, particularly, in southern part of Nigeria. This paper considered an eight-month initiation and termination sequence in the monthly precipitation data analysis of nine southern Nigerian stations between 1960 and 2012 with the aim of identifying years of drought and major drought events that have occurred in the southern Nigeria using Drought Severity Index based on eight-month cumulative precipitation anomaly (DSI8). The results revealed that years of extreme drought are most frequent at Ibadan and Warri and least at Enugu and Benin. Mild drought occurred most in Osogbo, Ondo and Benin and least in Calabar. Enugu and Benin were wettest followed by Calabar and Ikeja. On the decadal scale, extreme drought occurred most in 1970-1979 and 1980-1989 decades. The 1960-1969 was the wettest decade while the current decade (2010-…) was observed to be witnessing wetness. Mild drought was found to be predominant in the region with 44.12% average occurrence. With the on-going wetness of the current decade, measures such as national programme on flood control have been delineated to forestall any possible negative impacts.

 Key words: Drought severity index; Precipitation anomaly; Extreme events: Southern Nigeria.


 

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