IJSRP, Volume 7, Issue 10, October 2017 Edition [ISSN 2250-3153]
I. Mamuda, P.M. Akushai & J.A. Ramadan
Geophysical survey using the Vertical Electrical Sounding (VES) technique of investigation was carried out for the determination of groundwater potentials in parts of Mangu-Halle and surrounding areas. The ABEM Terrameter (SAS 1000), precisely the Schlumberger array with AB/2 electrode spread of 1.5m-215m was employed in the data collection. A total of thirty-five (35) VES points were collected. The field data were interpreted using WIN RESIST computer iterative program. The results obtained from the interpretations were illustrated as geo-electric sections and depth to basement maps which revealed 3-4 geo-electric layers. The first layer consists of topsoil / lateritic cap with resistivity values of 123-2908, the second layer consist of weathered zone with resistivity value of 6.0379, the third and the fourth layers consists of fractured basement with resistivity from 194-4968 and possibly aquiferous, promising good quantity of groundwater source; and the fifth layer consists of fresh basement. With reference to the interpretation of data acquired i.e aquifer thickness and material constituents in the subsurface, the area was classified into high, medium and low groundwater potential zones with the sole aim of providing the background information for detailed groundwater exploration and development within the area.