The Okavango Delta, an alluvial fan that has been built up by sedimentation into a graben structure connected to the East African Rift Valley, is supplied with water from the Okavango River, the catchment of which is situated in highlands of Central Angola. The Delta wetland contrasts sharply from its surroundings where rainfall is low, evaporation rates are high and surface water is lacking for most of the year. Keywords: Okavango Delta, hydrology, Geomorphology, Geochemistry, Water Resource Management.