الفهرس 
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Abstract
The present thesis concerns with the study of geoelectrical and hydrogeological characteristics of the Pleistocene aquifer in the area around the Tenth of Ramadan city.
The study area is located in the East ofNile Delta around the
Tenth of Ramadan city between long. 31 35’ and 32° 00’ E and lat.
30° 10’ and 30° 30’ N. To achieve the objectives ofthis study, the available geoelectrical, hydrogeological and hydrochemical measurements have been analyzed and interpreted.
The geoelectrical resistivity survey has been made using Schlumberger 4-electrodes array with maximum current electrodes spacing (AB) equals 1400 m. Fifty six YESes have been carried out. These YESes were analyzed and interpreted in which the true resistivity and the thickness of each layer were determined. The results of interpretation are represented in the form of iso-apparent resistivity contour maps, apparent resistivity sections, geoelectrical cross section, iso-transversal resistivity contour maps and isopach maps for the geoelectric sequence and confirmed by some drilled water wells.
The Pleistocene deposits in the study area are subdivided into three main geoelectric zones. The surface zone ”A” is composed of sands and gravels with relatively high resistivity values and small thickness. The second zone ”B” is affected by large variation in its resistivity values, which reflects lithologic variations within this zone. The third zone ”C” is considered the water bearing horizon. It consists of about 30 to 170 m of sands and gravels. The Miocene deposits are represented in the fourth geoelectric zone ”D”. It is characterized by relatively low resistivity in the southern and southeastern parts of the area compared with limestone. The area is found to be affected by about 20 inferred faults, which may affect the
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ABSTRACT
extension and thickness of the water bearing rocks and the water quality.
The hydrogeological conditions of the Pleistocene aquifer in the study area have been discussed. The hydrchemical analysis of 12 groundwater samples collected from the study area revealed that, the water salinity ranges from 733 to 5260 ppm indicating fresh/saline water with sodium chloride type reflecting the effect of seepage of fresh water from Ismailia canal and the seepage of saline water from
deep aquifers along fault plains.