STUDY OF THE IMPACT OF THE SURFACE WATER ON THE GROUNDWATER USING GEOELECTRICAL METHODS IN EL- SALHYIAH EL GEDIDAH, EGYPT | ||||
| Journal of Egyptian Geophysical Society | ||||
| Volume 10, Issue 1, 2012, Page 129-138 PDF (896.86 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jegs.2012.384987 | ||||
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| Authors | ||||
| A.A. Abd El-Rahman; A.N. El Sayed | ||||
| Geophysical Exploration Department, Desert Research Center, Matariya, Cairo, Egypt | ||||
| Abstract | ||||
| The main objectives of the investigation were to find out the impact of the surface water on the groundwater conditions and to detect any possible connection between the groundwater aquifers. A geoelectrical investigation has carried out in El-Salhyiah El-Gedidah, which lies between Ismailia Canal to the north and the Cairo-Ismailia desert road from the south. A grid pattern consists of 10 Vertical Electrical Sounding (V.E.S) stations have been carried out in the concerned area using Schlumberger electrodes configuration with current electrodes distance from 1000 to 1400m. Also, the two-dimensional (2D) geoelectrical imaging (Tomography) with Wenner measurements have been carried out along three profiles with a length of 460m with main purpose of finding out the extension, depth, thickness and lateral change of the water bearing layers. The interpretation of the geoelectrical data based on the information collected from existing wells in the area, indicated that the subsurface consists of four geoelectrical layers surface layer and layers (A, B and C) varying in depth, thickness and lithological composition. The upper layer "A" represents the water-bearing sandy clay and clay with a resistivity ranges 3.6 to 24 Ohm.m from south to north direction respectively. The lower layer “B” represents water saturated clayey sand and sand with a resistivity value ranges from (22-44 Ohm.m) from south to north direction respectively. The last layer “C” has low resistivity values ranges from 1.8 to 24 Ohm.m corresponds to clay. Concerning the 2-D resistivity images, it is obvious that the apparent resistivity values show different trends and shapes, which indicate and reflect heterogeneous character, due to lateral and vertical facies change in the subsurface succession, which have a direct effect on both the quantity and quality of groundwater. | ||||
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