NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Boteti River, Botswana, 2010, satellite image. Due to a lack of rainfall this river had been mostly dry since the late 1990s. It only fills when the Okavango Delta receives more water than it can hold. Image obtained by the Advanced Land Imager (ALI) aboard the Earth Observing-1 (EO-1) satellite, on 29th September 2010.
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