The Okavango Delta is situated deep within the Kalahari Basin. Shaped like a fan, the Delta is fed by the Okavango River, the third largest in southern Africa. Swollen with floodwaters from the summer rains, the Okavango River travels from the Angolan highlands, crosses into Botswana at Mohembo in the Caprivi, then later spills over the vast, fan-shaped Delta. As an extension of Africa’s Great Rift Valley, the Okavango is set within a geographi-cally unstable area of faults, and regularly experiences land movements, tremors and minor quakes. By the time the water reaches Maun, at the Delta’s southern fringes, its volume is a fraction of what it was. As little as two to three percent of the water reaches the Thamalakane River in Maun, over 95 percent lost to evapo-transpiration. It is the only river that does not drain into the sea or another body of water