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Title: COMPREHENSIVE HYDROGEOLOGICAL, HYDROGEOCHEMICAL AND ISOTOPE BEHAVIOR OF NORTHEAST AFRICA INTRACRATONIC BASINS: CASE STUDY ABU SIMBIL BASIN

Author: Ahmed F. Yousef and Mohamed M. Sultan

Year: 2009

Publisher: European Water Resources Association (EWRA)

Description:

There are four mega intracratonic basins and five small basins in NE Africa. Abu Simbil Basin is one of them and did not extensively studies may due to the less potentialities from oil and minerals point of view. The newly accumulation of High Dam Lake and the intensive drilling of groundwater wells, encourage the governments for launching a major program for sustainable development of the basin. This article deals with identification of the groundwater aquifer system and their relationships with the lake. There are two groundwater aquifers namely; Sabaya and Abu Simbil. They hydraulically connected through faults and pores. They have groundwater salinity varied from 410 to 710 and from 1001 to 1972 ppm. Sabaya groundwater samples are isotopically depleted where they have hydrogen isotope values ranging from -82.4% to -62.6%, while Abu Simbil are less depleted that have values between -81.1% and -69.9%. The surface water recharge through pores reaches to 5.5 km in Sabaya aquifer that increases to more than 30 km through E-W faults. Owing to the effect of their coarser texture of Abu Simbil aquifer, the effect surface water increases to about 17 km through pores and extended to more than 40 km through E-W faults.