Okavango Delta

River delta in Botswana

The Okavango Delta or Okavango Grassland is a vast inland delta in Botswana formed where the Okavango River reaches a tectonic trough at an elevation of 930–1,000 m (3,050–3,280 ft) in the central part of the endorheic basin of the Kalahari Desert. It is a UNESCO World Heritage Site as one of the few interior delta systems that do not flow into a sea or ocean, with a wetland system that is largely intact. Instead, the floodwater spreads over sandy floodplains and islands, and a large share seeps downward into the shallow alluvial aquifer beneath, before it is taken up by plants.

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