Groundwater potential assessment in a sedimentary terrain,southwestern Nigeria |
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Authors: | Ahzegbobor P. Aizebeokhai Kehinde D. Oyeyemi Emmanuel S. Joel |
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Affiliation: | 1.Physics Department, College of Science and Technology,Covenant University,Ota,Nigeria |
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Abstract: | Geoelectrical resistivity techniques are increasingly being applied in addressing a wide range of hydrological, environmental, and geotechnical problems. This is due to their effectiveness in near-surface characterization. In the present study, a suite of vertical electrical soundings (VESs) was integrated with 2D geoelectrical resistivity and time-domain induced polarization (IP) imaging to characterize the near-surface and delineate the underlying aquifer in a sedimentary terrain. The geophysical survey was conducted as part of preliminary studies to evaluate the potential of groundwater resource in Iyana-Iyesi and Canaan Land area of Ota, southwestern Nigeria. A high-yield confined sandy aquifer overlain by a low-yield aquitard was delineated; overlying the aquitard is a very resistive and thick layer that is predominantly composed of kaolinitic swelling clay intercalated with phosphate mineral. |
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