Sources of groundwater recharge at the confluence of the Niles, Sudan

Add time:09/28/2019    Source:infona.pl

Due to the rapid expansion of the Sudanese capital city far away from its three Niles, it has become a necessity to estimate the sustainability of the groundwater resources in this arid area. The purpose of this study based on the stable-isotopic composition of groundwater is to identify the sources of recharge and their relative contribution. The results show that groundwater infiltrated from the Niles under the present prevailing arid climate, with greater contribution from the White Nile compared to the Blue Nile, occupies an extension of 12km from the Niles within the two main aquifers. Paleogroundwater of meteoric origin, infiltrated in the cooler pluvial earlier Holocene, occupies the outer zones beyond the Niles effect. A rational utilization policy is recommended to preserve the finite groundwater resources.

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