Application of vertical electrical sounding for ground water exploration around basement complex terrain, Southwestern Nigeria
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Date
2019-02-05
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Published by Nasarawa State University, Keffi, Nasarawa State.
Abstract
Vertical Electrical Sounding was used for identification of potential groundwater zones in Akure, Ondo state and measurements were
taken using Schlumberger Configuration along the four profiles at station intervals of 10 m. A total of 53 VES were conducted with
half electrode spacing (AB/2) varying from 1-150 m. This geophysical work was carried out at around Federal housing estate Akure,
South-western Nigeria known to be associated with the problems of groundwater aquifer. Many of the boreholes drilled in this area are
either perched or later dried-up during the dry seasons including hand-dug wells. The geoelectric sections delineated a maximum of
four subsurface geological layers consisting of the top soil, weathered layer, fractured basement and fresh basement. The top soil
resistivity values vary from 30.9-257 Ωm with thickness ranging from 0.3-5.1 m. The weathered layer resistivity values range from
20.2-2832.3 Ωm. Its thickness varies from 1.1 and 10.5 m. The fractured basement resistivity range from 23.9 to 570 Ωm, the thickness
varies from 2.6-65.6 m. The weathered and the fractured basement constitute the main aquifer units in the study area. The fresh
basement resistivity values ranges from 582-64167 Ωm. The groundwater map generated was used to classify the study area into high,
medium and low groundwater potential zones. VES methods have been successfully used to evaluate the groundwater potential of the
Federal Housing Estate Akure.
Description
Keywords
VES, Geoelectric Section, Acquifer, Deep fracture and Ground Water Potential Ma
Citation
5. Abubakar, H. O., Bayode, S., Ajayi, C. A., Badmos, A., & Yusuf, M. A. (2016). Application of vertical electrical sounding for ground water exploration around basement complex terrain, Southwestern Nigeria. NSUK Journal of Science & Technology, 6 (2), 113 -120.