GEOPHYSICAL CHARACTERIZATION OF THE COASTAL AQUIFER WEST EL-QASR AREA, NORTHWESTERN COAST, EGYPT | ||
| Journal of Egyptian Geophysical Society | ||
| Volume 16, Issue 1, 2018, Pages 145-158 PDF (3.46 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jegs.2018.385802 | ||
| Authors | ||
| H.H. MAHMOUD; M.S.M. BARSEEM | ||
| Geophysical Exploration Department, Desert Research Center, Cairo - Egypt | ||
| Abstract | ||
| A surface geophysical survey was performed west El-Qasr area, in the Northwestern Coast of Egypt, to clarify the geophysical characterization of the coastal aquifer. The study area is characterized by presence of Pleistocene oolitic limestone aquifer that is contaminated by sea water intrusion. This aquifer represents the main source of groundwater that used in agriculture projects along the coastal plain. The integration between surface geophysical techniques including Vertical Electrical Sounding (VES), Two- Dimensional Resistivity Imaging profiles (2-D) and Time Domain Electromagnetic Sounding (TDEM) are used successfully to determine water bearing layers and their spatial distribution, outline the brackish water bearing layer that is suitable for exploitation along the study area and to detect depth to brackish/saline water interface in the coastal aquifer. TDEM sounding is proven as a successful method to trace brackish/saline water interface in the study area; bulk resistivity of the water bearing layer below this interface was used to calculate the porosity of this aquifer by applying Archie’s equation; this aquifer has an excellent porosity values (33.0 %). The combination between VES, 2-D and TDEM methods beside the available information from the existing wells is able to decrease the ambiguity during the interpretation of the acquired data. Interpreted data of the surface geophysical tools exhibit a good match between them and the proper sites for drilling new wells are recommended. | ||
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