Abstract
Gadarif city, in central Sudan, has suffered from a shortage of drinking water for decades. Half of its daily water requirement is met through river water imported over 50 km away and from local salty wells. As a consequence of building a small dam to control seasonal floods, it was found that the dam reservoir recharges groundwater, raising the water table by few a meters. Such experience was repeated and a second dam built in response to this success. This indicates that such a method may be a useful rainwater harvesting technique to provide safe water in water deficit areas in semi-arid regions affected by climate change and population increase.
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