Extreme drought occurs when even the rivers are completely dried up. Seen from above, the riverbeds are even dryer than their surroundings. This is because the top layer of water has evaporated. However, deeper layers of sand retain a lot of water. Up to 30 percent of the sandy flats consist of water because it can’t flow downwards. ‘There’s always an impermeable layer at the bottom made of rocks. Hadzabe will walk miles to get to the Riverbed during the drought and dig the sand out to get water which in most cases is only 20 to 30cm deep, and they dig the sand out just by using their hands.
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21 сен 2024
