Following topics are presented on this website: Estimation of Groundwater Recharge in Semiarid Namibia Using the Chloride-Mass-Balance-Approach; Groundwater Recharge in the Transition Zone between Solid Rock Ridges and the Cover of Loose Kalahari Sediments (Namibia); Groundwater of the North-Western Kalahari, Namibia. Estimation of Recharge and Quantification of the Flow Systems; Hydrogeology of the Kalahari in north-eastern Namibia with special emphasis on groundwater recharge, flow modelling and hydrochemistry; Hydrogeology of the Kalahari in north-western Botswana.