Geoelectrical study on the groundwater occurrence in wadi el Newiya area-el Saff-south cairo-egypt

الملخص EN

The area of study lies at Wadi El Wedy to the south east of El Saff area (55 km south-east of Cairo).

The main objective of that work is the study of groundwater occurrence and selecting the proper sites for the drilling water wells in case groundwater is proved to exist.

The geoelectrical resistivity methods are used through conducting 14 vertical electrical soundings and one profile of two-dimensional electrical resistivity imaging (electrical tomography) of 720 m length.

The detected geoelectrical succession consists of five geoelectrical layers.

These from top downwards are, the top layer is formed of wadi deposit, the second layer consists of sand and gravel, the third layer consists of clay, shale or sticky clay, the fourth layer is saturated sandy clay and the last geoelectrical layer consists mostly of the Eocene limestone of high resistivity.

This detected geoelectricl succession is dipping towards the northwestern direction and affected by normal fault with the northwest throw.

The thickness sticky clay unit increases in the northeast direction while the sandy clay bed increases towards the northwestern corner of the study area.

The water bearing formation is the fourth layer (sandy clay), with thickness increases towards the northwestern corner of the area.

The groundwater potentiality of this aquifer is moderate.

The groundwater table is recorded for about +40 m.

It can be recommended that the new water well can be drilled at the northwestern corner of the area, but regarding the litho logy of the revealed water-bearing formation and is limited thickness, the groundwater productivity will be moderate.