Modelling streamflow response to climate change in data-scarce white volta river basin of West Africa using a semi-distributed hydrologic model

Sulemana Abubakari, Xiaohua Dong*, Zhongbo Su, Xiaonong Hu, Ji Liu, Yinghai Li, Tao Peng, Haibo Ma, Kai Wang, Shijin Xu

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
86 Downloads (Pure)

Abstract

This study uses high resolution Climate Forecast System Reanalysis (CFSR), SWAT and two IPCC climate change (CC) scenarios (A1B and B1) combined with two general circulation models (GCMs) (HADCM3 and MPEH5) to evaluate impact of CC on streamflow in the White Volta basin of West Africa. The evaluation criteria (R2 and NSE > 0.70 and PBIAS within ±25%) during calibration and validation showed good simulation of the basin hydrology. Using average streamflow from 1979 to 2008 as a baseline, there were uncertainties over the sign of variation of annual streamflow in the 2020s. Annually, streamflow change is projected to be within 4.00% to þ13.00% in the 2020s and þ3.00% to þ16.00% in the 2050s. Monthly streamflow changes for most months vary between 13.00% and þ32.00%. A shift in monthly maximum streamflow from September to August is projected, while the driest months (December, January and February) show no change in the future. Based on the model results, the White Volta basin will likely experience an increase in streamflow by the mid-21st century. This would call for appropriate investment into cost-effective adaptive water management practices to cater for the likely impact of CC on the future hydrology of the basin.

Original languageEnglish
Pages (from-to)907-930
Number of pages24
JournalJournal of Water and Climate Change
Volume10
Issue number4
Early online date14 Jun 2018
DOIs
Publication statusPublished - 1 Dec 2019

Keywords

  • CFSR
  • Climate change
  • Hydrologic modelling
  • LARS-WG
  • SWAT
  • White Volta River basin
  • ITC-ISI-JOURNAL-ARTICLE
  • ITC-GOLD
  • UT-Gold-D

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