A Historical Analysis of Rainfall Trend in the Olifants Basin in South Africa
- C. Gyamfi
- J. M. Ndambuki
- R. W. Salim
AbstractA set of homogeneity test methods and the Mann-Kendall trend test were applied on historical rainfall records of the Olifants Basin to detect changes in rainfall pattern under a changing climate. In total, historical rainfall records from 13 stations obtained from the South African Weather Service (SAWS) and the Department of Water Affairs (DWA) spanning the period 1975-2013 were used in the analysis. Results of the study indicate an insignificant declining rainfall trend in the Olifants Basin with a mean annual rainfall of 664 mm. Rainfall in the basin exhibits spatio–temporal variation with coefficient of variation of 24%. Inter-annual and seasonal variability is dominant in the records examined. Changes observed in rainfall over the years were therefore concluded to have resulted due to climate change impacts.
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h-index (December 2019): 13
i10-index (December 2019): 21
h5-index (December 2019): 8
h5-median(December 2019): 14
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