Volume 20, Issue 1, January 2016, Pages 117–128
Abraham Adelowo1, EMMANUEL O. OJO2, and Blessing N. Ossai3
1 National Agency for Science and Engineering Infrastructure (NASENI), Nigeria
2 Department of Science Infrastructure, National Agency for Science and Engineering Infrastructure (NASENI), P.M.B 391, Garki, Abuja, Nigeria
3 Department of Science Infrastructure, National Agency for Science and Engineering Infrastructure (NASENI), P.M.B 391, Garki, Abuja, Nigeria
Original language: English
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Vertical electrical soundings (VES) method using the Schlumberger array was used in the study area. 20 VES were probed and the data interpretation was carried out with aid of computer softwares IPI2Win and surfer 8. The results revealed three subsurface geoelectric layers (top soil, weathered layer and fresh layer) at VES 4, 5, 6, 7, 8, 9and 10, and the rest VES stations have four subsurface geoelectric layers (top soil, lateritic clay, weathered layer and fracture/fresh layer). The top layer resistivity values range from 112-829 ohm-m, and thicknesses from 0.5-8.85m. VES 1, 2, 3, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20 with four layers, the second layer constitute the Lateritic clay and its resistivity values range from 34.9-406Ωm, and thicknesses from1.37-5.78m respectively. The second layer of VES 4, 5, 6, 7, 8, 9 and 10, and the third layer of VES 1, 2, 3, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20 which constitute the Weathered zone has resistivity values that range from 8.99-339Ωm and thicknesses between 3.01-41.6m. The fourth layer of VES 11, 12, 17, 18 and 19 constitute the Fractured basement with resistivity values that range from 182-547Ωm. The third layer of VES 4, 5, 6, 7, 8, 9 and 10, and the fourth layer of VES 1, 2, 3, 13, 14, 15, 16 and 20 constitute the Fresh basement with resistivity values that range from 2090-19465Ωm. It was also observed that the Total Dissolved Salt values range from 12.797-778.643mg/l. VES has shown that it's very reliable for the determination of lithology and groundwater quality in the study area.
Author Keywords: Vertical Electrical Sounding, Schlumberger array, Lithology, Groundwater quality, Total Dissolved Salt.
Abraham Adelowo1, EMMANUEL O. OJO2, and Blessing N. Ossai3
1 National Agency for Science and Engineering Infrastructure (NASENI), Nigeria
2 Department of Science Infrastructure, National Agency for Science and Engineering Infrastructure (NASENI), P.M.B 391, Garki, Abuja, Nigeria
3 Department of Science Infrastructure, National Agency for Science and Engineering Infrastructure (NASENI), P.M.B 391, Garki, Abuja, Nigeria
Original language: English
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Vertical electrical soundings (VES) method using the Schlumberger array was used in the study area. 20 VES were probed and the data interpretation was carried out with aid of computer softwares IPI2Win and surfer 8. The results revealed three subsurface geoelectric layers (top soil, weathered layer and fresh layer) at VES 4, 5, 6, 7, 8, 9and 10, and the rest VES stations have four subsurface geoelectric layers (top soil, lateritic clay, weathered layer and fracture/fresh layer). The top layer resistivity values range from 112-829 ohm-m, and thicknesses from 0.5-8.85m. VES 1, 2, 3, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20 with four layers, the second layer constitute the Lateritic clay and its resistivity values range from 34.9-406Ωm, and thicknesses from1.37-5.78m respectively. The second layer of VES 4, 5, 6, 7, 8, 9 and 10, and the third layer of VES 1, 2, 3, 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20 which constitute the Weathered zone has resistivity values that range from 8.99-339Ωm and thicknesses between 3.01-41.6m. The fourth layer of VES 11, 12, 17, 18 and 19 constitute the Fractured basement with resistivity values that range from 182-547Ωm. The third layer of VES 4, 5, 6, 7, 8, 9 and 10, and the fourth layer of VES 1, 2, 3, 13, 14, 15, 16 and 20 constitute the Fresh basement with resistivity values that range from 2090-19465Ωm. It was also observed that the Total Dissolved Salt values range from 12.797-778.643mg/l. VES has shown that it's very reliable for the determination of lithology and groundwater quality in the study area.
Author Keywords: Vertical Electrical Sounding, Schlumberger array, Lithology, Groundwater quality, Total Dissolved Salt.
How to Cite this Article
Abraham Adelowo, EMMANUEL O. OJO, and Blessing N. Ossai, “DETERMINATION OF LITHOLOGY AND GROUNDWATER QUALITY IN AWE, OYO STATE, NIGERIA, USING RESISTIVITY METHOD,” International Journal of Innovation and Scientific Research, vol. 20, no. 1, pp. 117–128, January 2016.
