History Of Egypt And Southwestern Part Of Egypt

1104 Words Jan 21st, 2016 5 Pages
In the past periods, the northwestern part of Sudan and southwestern part of Egypt (Kehl and Bornkamm, 1993) were with great effective moisture, which are evident from archaeological sites associated with remnants of playa or lake deposits. This was the source of recharge in the NSAS. The estimated recharge rates of the pluvial period were a little high at the Uweinat highlands and central Sudan area (7–15 mm/year), and low in northern Sudan and southern Egypt area (6–8 mm/year) (Fig. 13). During the filling-up process, the high hydraulically conductive sandstones (~ 4.4×10-5 to 1.3×10-4 ms-1) in the area between central Sudan and Uweint–Asawn uplift were filled up with water to the surface with a general flow in a NE direction from Erdi and Darfur highlands. Contemporary flow in a NE direction has occurred from the Uweinat highland area.

The sediments in the area between Gebel Uweinat and Bir Safsaf are composed of about 400 m thick of relatively homogenous sandstones with high porosity and permeability (Klitzsch et al., 1979; Schneider and Sonntag, 1985). These strata belong to the Six Hills Formation and represent the lowest part of the Nubia Group (Klitzsch et al., 1979). The sediment thickness exceeds 700 m in the deeper Misaha trough (Klitzsch, 1983) at Bir Misaha in the middle part of the area between Gebel Uweinat and Bir Safsaf (Fig..), where the Six Hills Formation is probably overlain by more sandy facies deposits of younger formations. Further north from the…
Open Document