A Historical Analysis of Rainfall Trend in the Olifants Basin in South Africa


  •  C. Gyamfi    
  •  J. M. Ndambuki    
  •  R. W. Salim    

Abstract

A 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.


This work is licensed under a Creative Commons Attribution 4.0 License.
  • ISSN(Print): 1927-0542
  • ISSN(Online): 1927-0550
  • Started: 2012
  • Frequency: semiannual

Journal Metrics

(The data was calculated based on Google Scholar Citations)

h-index (December 2019): 13

i10-index (December 2019): 21

h5-index (December 2019): 8

h5-median(December 2019): 14

Contact