198
S. F. Elbeih and E. A. Zaghloul
Fig. 11 Qalamun Drainage Pond
hydrogeologic conditions of Dakhla Oasis. The Nubian Sandstone basin is tectonically affected by regional faults and is divided into different sub-basins. The salinity
of the aquifer changes vertically and laterally. In general, the salinity decreases with
depth in Kharga and Dakhla Depressions, from 1,000 ppm in the upper horizons to
200 ppm in the lower ones. In addition, a review of the irrigation system and drainage
ponds are highlighted. Detailed survey and test drillings together with the intensive
S. F. Elbeih and E. A. Zaghloul
Fig. 11 Qalamun Drainage Pond
hydrogeologic conditions of Dakhla Oasis. The Nubian Sandstone basin is tectonically affected by regional faults and is divided into different sub-basins. The salinity
of the aquifer changes vertically and laterally. In general, the salinity decreases with
depth in Kharga and Dakhla Depressions, from 1,000 ppm in the upper horizons to
200 ppm in the lower ones. In addition, a review of the irrigation system and drainage
ponds are highlighted. Detailed survey and test drillings together with the intensive