Impact of meteorological conditions on water resources in the Upper East Region of Ghana using remotely-sensed and modelled hydrological data

The Upper East Region, Ghana, West Africa, lies within the Volta Basin, floods annually, and contributes substantially to Ghana’s food production. We assessed precipitation (P), evapotranspiration (ET), total water storage anomalies from GRACE (TWSA) GLDAS-Noah (TWCA) study influence of UER’s climate on availability between 2002 2017. analysed (1) relative uncertainties data sets using triple-cornered hat method, (2) terrestrial budget validate TWSA/TWCA (3) cross- multi-correlation analyses relationship (or availability) meteorological variables. found strong correlations different P products (r > 0.96), 0.95), but not ET products. hybrid P, TWSA Jet Propulsion Laboratory, ERA-5 had smallest uncertainties. increased by 9.8 ± 0.8 mm yr−1 while TWCA decreased. showed no evidence a trend were similarly influenced other However, 93 183 months surplus mean net was positive – indicating UER received more than it lost. These agree with increasing trend. validation also confirmed that can be used for management; underestimates in UER.