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GROUND WATER EXPLORATION USING RESISTIVITY METHOD (CASE STUDY OF ERUNMU AND ITS ENVIRONS, SOUTH WESTERN NIGERIA.)

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Abstract

Geophysical survey involving electrical resistivity method has been carried out in Erunmu, Oyo state south-western Nigeria with a view to delineate the geoelectric characteristics of the basement complex and evaluate its ground water potential in the area. A total of 7 vertical electrical sounding stations were established within the site along 7 transverses. The Schlumberger configuration was used for the data acquisition. The half current electrode (AB/2) used range from 1.0 to 75m. The quantitative interpretation of the VES curve involved the use of partial curve matching and the I-D computer iteration technique. The depth sounding interpretation results were used to generate geo-electric sections from which the aquifer was delineated. The geoelectric section drawn from the result of the interpretation reveals five (5) subsurface layer which comprises of the top soil, latentic sand, partially weathered, weathered and fractured basement. The weathered and fractured constituted th
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