Evaluation of Vertical Electrical Sounding Method in Groundwater Development in the Basement Complex Terrain of West-Central, Nigeria.
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Date
2013
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Faculty of Engineering and Technology, University of Ilorin, Nigeria
Abstract
This research evaluated the Vertical Electrical Sounding (VES) method of groundwater development in the Basement Complex terrain of West Central Nigeria. It was aimed at verifying the reliability of VES in differentiating lithologies, predicting the depth to basement and probably, aquifer in groundwater development. In doing this, the Schlumberger electrode configuration was employed in the surveys while partial curve matching and computer iteration techniques were used to interpret the curves obtained. In all, seventy three VES were carried out and fourteen boreholes constructed. Comparison was made between the predicted depth to basement from VES and the actual depth from the drilling log. A linear relationship between the actual depth and that predicted by VES was established with coefficient of determination of 0.94 confirming the reliability of the VES method. None of the boreholes drilled was abortive.
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Keywords
Groundwater, Aquifer, Geoelectric measurement, Fractured zone