This study was carried out in Harat Rahat (south of
Almadinah Almonwarah) using seismic reflection and resistivity methods. The
main objectives of this study are to determine the extent of the basaltic layer
and to define the subsurface faults and fractures that could affect and control
the groundwater movement in the study area. A 2D seismic profile was acquired
and the result shows that the subsurface in the study area has a major fault.
We obtained a well match when the seismic result was compared with drilled
wells. As a complementary tool, the resistivity method was applied in order to
detect the groundwater level. The results of the resistivity method showed that
six distinct layers have been identified. The interpretation of these six
layers show that the first three layers, the fourth layer, the fifth layer and
the bottom of the section indicated various subsurface structures and
lithologies; various basaltic layers, fractured basalt, weathered basement and
fresh basaltic layers, respectively. It is obvious that the eventual success of
geophysical surveys depend on the combination with other subsurface data
sources in order to produce accurate maps.
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E. A. Ayolabi, E. A. Atakpo, L. Adeoti, E. C. Otobor and T. Arerin, “Groundwater Quality Assessment Using Predrilling Electrical Measurements,” Journal of Environmental Hydrology, Vol. 17, 2009, pp. 1-12.
E. A. Ayolabi, A. F. Folorunso and M. O. Oloruntola, “Constraining Causes of Structural Failure Using Electrical Resistivity Tomography (ERT): A Case Study of Lagos,” Southwestern, Nigeria, Mineral Wealth, Greece, Vol. 156, 2010, pp. 7-18.
F. Cahyna, O. Mazac and D. Vendhova, “Determination of the Extent of Cyanide Contamination by Surface Geo-Electrical Methods,” SEG-Geotechnical and environmental Geo-physics, Tulsa., Vol. 2, 1990, pp. 97-99.
C. R. Clement, T. L. Pratt, M. L. Holmes and B. L. Sherrod, “High-Resolution Seismic Reflection Imaging of Growth Folding and Shallow Faults beneath the Southern Puget Lowland, Washington State,” Bulletin of the Seismological Society of America, Vol. 100, 2010, pp. 1710-1723. doi:10.1785/0120080306
J. Cocker, M. Urosevic and B. Evans, “A High Resolution Seismic Survey to Assist in Mine Planning: Proceeding of Fourth Decennial International Conference on Mineral Exploration,” edited by A. G. Gubins, 1997, pp. 473 - 476.
P. H. Giao, S. G. Chung, D. Y. Kim, and H. Tanaka, “Electrical imaging and laboratory resistivity testing for geotechnical investigation of Pusan clay deposits,” Journal of Applied Geophysics, Vol. 52, 2003, pp. 157-175. doi:10.1016/S0926-9851(03)00002-8
M. H. Khalil, “Hydrogeo-physical Assessment of Wadi el-sheikh Aquifer, Saint Katherine, South Sinai, Egypt,” Journal of Environmental and Engineering Geophysics, JEEG, Vol. 14, No. 2, 2009, PP. 77-86.