Spatially distributed groundwater recharge from hydrological model

We present the results of a semi-distributed hydrological modeling approach that incorporates water balance routines coupled with baseflow modeling techniques for assessing spatio-temporal variations of groundwater recharge on a regional scale. The study area is the Amathole Water Supply System situated in a semi-arid part of the Eastern Cape of South Africa. Dependent on the sub-catchment, the mean annual groundwater recharge is estimated to vary between ~0.5 to 8 % of annual rainfall. Annual groundwater recharge exhibits a high spatio-temporal heterogeneity.