الفهرس 
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Abstract
The present study was initiated to define the major late Quaternary geologic events in Sa El Hagar area. To achieve the main aim of this study, nine boreholes were drilled, there are different facies encountered in the upper Quaternary subsurface sequence of Sa El Hagar area from older to younger: Pleistocene fluvial sand (Nile3), Holocene aeolian fine sand (Nile2) and Holocene Nile mud (Nile1) which classified into Holocene overbank mud (Nile1a) and Holocene lacustrine humic mud (Nile 1b). The hydrochemistry of the groundwater in the Pleistocene aquifer is achieved through the analysis of 19 water samples. The T.D.S content of the analyzed water samples ranges from 260 to 1400 ppm. All the groundwater samples reflect a freshwater type. Based on the physical and chemical analysis of the ground samples, the water quality seems suitable for drinking and domestic uses. The Geoelectrical surveys especially (VES) are assistant tools to explore the near surface geology. from the results of the geoelectric cross section, isopach and paleotopographic map, two generation of the defunct channels may be recognized in Sa El Hagar area. The older channels, probably early to middle Holocene, are characterized by low sinuosity, compared with the younger channels. The younger channels system is characterized by broad meanders, probably as a consequence of sea level rise and decreased gradient since the middle Holocene.