Ajisafe Y. C.
Abstract: Ekiti State University is an academic environment with an increasing need for steady and sustainable water supply. This study aimed at locating aquiferous zones where groundwater can be exploited. The objectives are to delineate the groundwater potentials, and determine the layer resitivities and lateral extent. A geophysical investigation technique involving the vertical electrical sounding (VES) was employed to provide information about the subsurface condition with respect to depth. Four (4) VES points data were acquired. The results of the interpretation was predominated by a KH-Type curve, delineating four (4) layers. The layers were topsoil, sandy clay, weathered/fractured layer and the crystalline basement based on their resistivity values. The topsoil had resistivities ranging from 75.7 m- 449.8 m to a depth of 0.9 m-2.9 m. The second layer characterized by sandy clay had resistivities ranging from 628.6 m- 700.9 m to a depth of 3.7 m-15.1 m. The weathered layer had resistivities ranging from 37.7 m- 195.4 m to a depth of 14.1 m- 32.7 m and the fresh bedrock had resistivities ranging from 2430.7 m-. The results reveal thick overburden (about 3m to 15m) which aquiferous. The weathered/fractured layers in VES 1, 2 and 4 have anomously low resistivity values and therefore, are assumed to be the zones where appreciable amount of water can be found.
Keywords: Aquiferous, Groundwater, Technique, Basement, Potential