NEAR-SURFACE GEOPHYSICAL INVESTIGATIONS AT TUSHKA AREA, EGYPT | ||
| Journal of Egyptian Geophysical Society | ||
| Volume 9, Issue 1, 2011, Pages 87-97 PDF (2.06 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jegs.2011.384440 | ||
| Author | ||
| A.K. El-Werr | ||
| Geophysics Department, Faculty of Science, Ain Shams University, Egypt. | ||
| Abstract | ||
| Near-surface geophysical investigations represented by shallow seismic refraction and Vertical Electrical Sounding (VES) measurements, in addition to borehole drilling have been carried out at Tushka area aiming at the examination of the shallower part of the geological section for topsoil reclamation and agricultural soil development purposes, and also for drainage system implementation that is very useful for agricultural engineering. Searching for groundwater is not the target of this work. Data analysis of these two geophysical tools was done and checked with the borehole data to provide reliable results. The results of data interpretation reveal a soil profile composed of almost five layers with an average depth of investigation of about 40 m. A major fault dissecting the study area and running in the northeast-southwest direction is also detected from both seismic refraction and electric methods. This fault divides the area into two different blocks; the western block represents its down thrown side and it is mainly composed of topsoil overlying clay, silty clay, sandy silty clay, and silty sandstone, while the eastern one represents the up thrown side and it is mainly composed of topsoil overlying silty sandstone and very hard sandstone. A drainage system should be done for a short-term at the western part due to the occurrence of thin topsoil layer overlying thick clay and it can be done for a long-term at the eastern part in areas of thin topsoil layer overlying a rock and/or thick topsoil overlying clay. The drainage may not be done at all in areas of thick topsoil overlying a rock. | ||
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