ABSTRACT

Schlumberger soundings were made by expanding current electrode spacings to reach to 1800 m. Twenty five vertical soundings (VES’es) were measured in the area northwest of Assiut City. The main objectives of the present work were studying the electrical properties of the subsurface layers and investigating ground water possibilities. The sounding curves were interpreted using available master curves and a computer program. True resistivity and isopach maps for the subsurface geoelectrical layers were prepared as well as subsurface electric-stratigraphy cross sections. Inspection of the results indicated the presence of an old buried channel extending E-W in the middle part of the study area and N-S in the southwestern part, where the depth does not exceed 50 m. Two water-bearing formations of coarse to fine sand were also detected. The first is located at a depth ranging between 10 and 25 m and is about 10–30 m thick. The second is situated at depth that varies from 50 to 110 m with a thickness ranging from 50 to 130 m. The thickness of both formations increases in both northeast and southwest directions. Highly resistive bodies, possibly of limestone, were detected at depths ranging between 150 and 250 m along sections AA, BB and CC.