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Namibia Geography

Namibia
Geography

Simply put, average rainfall increases from the south-west to the north-east. The annual amounts vary between 50 mm in the Namib and 700 mm in the Caprivi. In years of drought, like 1991 to 1993, they can even be much lower than that.

dry riverbed in central namibiaRain mostly comes from the north-east between December and February, when humid, unstable air masses approach from the tropical part of Africa and reach Botswana and Namibia, causing strong thunderstorms with torrential rains. Most of the rainwater evaporates immediately or is channelled away as sheet flow without being absorbed by the vegetation. However, due to water-impermeable layers of clay and stone, the groundwater is collected and is eventually used by the surrounding settlements and farms.

Part of the annual rainfall is collected in dams, the biggest of them being Hardap Dam near Mariental with a capacity of 300 million cubic metres. The water supply remains, on account of the growing population, a major problem for Namibia. There are, for example, plans to build a pipeline from the Okavango to Windhoek, but Botswana fears changes in the ecology of the Okavango Delta and opposes the project.

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