Abstract
Uneven surfaces of sand particles provide ideal opportunities, under arid conditions, for runoff to be stored in the voids of sandy riverbed of ephemeral river. Series of laboratory experiments were performed to study major controlling parameters of sedimentation in sand water storage in order to optimize storage potential. Analysis was based on coefficient of uniformity of grain size distributions of deposited sediments. Ideally, desirable sediment grade for optimal water storage in sand reservoir is uniform sand grade with coefficient of uniformity less than 5. The results can be used to determine height of weir given required grade of sand and the flow conditions. Key words: Floodwater harvesting, sedimentation, sand river, groundwater storages.
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