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S. F. Elbeih and E. A. Zaghloul
4 Hydrologeological Conditions
The aquifer consists of alternating beds of sandstone (70%, shale and clay 30%). The
shale and clay beds are laterally discontinuous and of varying thickness. The Nubian
Sandstone succession increases in thickness from 200 m to 700 m in East Oweinat
area, 300 m to about 1,500 m in Dakhla Oasis. Hydrogeological maps for Dakhla
Oasis have been updated based on field and previous work (ASRT 2016) (Figs. 3 and
4).
4.1 The Aquifer Geometry
The Nubian Sandstone basin is tectonically controlled by a group of regional faults
and is divided into different sub-basins. The Dakhla Basin is hydraulically connected
with the Kufra basin in Libya, Tebesti-Ennedi Mountains in Chad and Sudan (Fig. 5).
The Nubian aquifer system, as a multi-layered artesian aquifer, is classified by Ezzat
Fig. 3 Generalized section of the Nubian Sandstone aquifer of Dakhla Depression (Modified after
Heinl and Thorweihe 1993)
S. F. Elbeih and E. A. Zaghloul
4 Hydrologeological Conditions
The aquifer consists of alternating beds of sandstone (70%, shale and clay 30%). The
shale and clay beds are laterally discontinuous and of varying thickness. The Nubian
Sandstone succession increases in thickness from 200 m to 700 m in East Oweinat
area, 300 m to about 1,500 m in Dakhla Oasis. Hydrogeological maps for Dakhla
Oasis have been updated based on field and previous work (ASRT 2016) (Figs. 3 and
4).
4.1 The Aquifer Geometry
The Nubian Sandstone basin is tectonically controlled by a group of regional faults
and is divided into different sub-basins. The Dakhla Basin is hydraulically connected
with the Kufra basin in Libya, Tebesti-Ennedi Mountains in Chad and Sudan (Fig. 5).
The Nubian aquifer system, as a multi-layered artesian aquifer, is classified by Ezzat
Fig. 3 Generalized section of the Nubian Sandstone aquifer of Dakhla Depression (Modified after
Heinl and Thorweihe 1993)