Hydrogeophysical Investigations Using DC Resistivity …
265
Fig. 3 General stratigraphic sequence and litho-facies of Dakhla Oasis (after Heinl and Thorweihe
1993)
sediments are represented by alluvial deposits, sand dunes, playa, and salty deposits
(Sabkha) in southern parts of the area (Ebraheem et al. 2004).
From hydrogeological point of view, the Nubian aquifer (NSAS) is considered
to be one of the most important freshwater aquifer system in the world. It spreads
over a vast area in the southern parts of Egypt and Libya (Fig. 4). As indicated in
the hydrogeological cross section of the lower part of Fig. 4c, NSAS is composed
of different saturated coarse-grained sand layers confining with shale interbeds that
265
Fig. 3 General stratigraphic sequence and litho-facies of Dakhla Oasis (after Heinl and Thorweihe
1993)
sediments are represented by alluvial deposits, sand dunes, playa, and salty deposits
(Sabkha) in southern parts of the area (Ebraheem et al. 2004).
From hydrogeological point of view, the Nubian aquifer (NSAS) is considered
to be one of the most important freshwater aquifer system in the world. It spreads
over a vast area in the southern parts of Egypt and Libya (Fig. 4). As indicated in
the hydrogeological cross section of the lower part of Fig. 4c, NSAS is composed
of different saturated coarse-grained sand layers confining with shale interbeds that