A Geophysical Initiative for : Assessing Groundwater Resources in Egypt's Wadi El-Meyah Using Integrated Geoelectric and Geomagnetic Methods.

Paper ID : 1088-ISCH

Authors

Adel D. M. Kotb * Helwan University

Abstract

The study area considers as a part of Wadi Al-Myah which is one of the biggest valleys in the Eastern Desert of Egypt. This study aims to demonstrate the geomagnetic and geoelectric resistivity techniques to exploring groundwater potentiality in Wadi Al-Myah. Fourteen vertical electrical sounding stations (VES's) were conducted in the study area. These VES's have been interpreted and presented in 2D maps and geoelectric cross sections to determine the subsurface layers, lithologies and thicknesses variations of each layer. Five geoelctric layers are obtained: The first layer represents surface cover which consists of Wadi deposits; the second layer represents the silty sand layer with relatively low resistivity values; the third layer has low resistivity and consists of clay; the fourth layer represents the water-bearing formation which consists of sands of Nubia Aquifer and the fifth layer has high resistivity that reflects the basement rock in the study area which considers the base of aquifer. Three hundred geomagnetic points were conducted along the Wadi in total 35 km and analyzed to evaluate the subsurface and to trace the basement depth, which control the aquifer geometry. The combined geophysical study revealed that the maximum depth to the basement is 220 m, and the minimum is 50 m, with an average value of 130 m. Also, the average thickness of the water-saturated zone reaches 50 m and the top of the water bearing layer is 50 m.

Keywords

geoelectric, magnetic, Sustainable Water, Wadi El-Meyah

Status: Abstract Accepted (Oral Presentation)