Geoelectric Investigation of Some Parts of Ibrahim Badamasi Babangida University, Lapai, Nigeria

Abstract

Aim: A geoelectric investigation of the subsurface layering of some locations in the Ibrahim Badamasi Babangida University, Lapai was carried out using the Schlumberger vertical electrical sounding (VES) method with a view to determining the depth of aquif er for groundwater development. Methodology: The G41 Geotron Resistivity Meter was used in obtainin g six (6) vertical electrical sounding data along dedicated profiles at different locations within the university, where there is concentration of developmental activities, while a global positioning system (GPS) enabled device was used in tracking the coo rdinates. The VES data so obtained were processed using the interpex 1xD sounding interpretation software. Results:The VES point near the Physics Block was observed to have the shallowest depth of aquifer at about 20m with the fractured basement of thick ness about 18m; while the aquifer at the VES point near the StudentsHostel which proved to be the best was about 38m thick at a depth of 46m. The results also show that the area is generally gently undulating and slopes from north to south with an averag e depth to aquifer formations of 36.75m. The lithology inferred from the interpretation showed a four layered earth model indicating the top lateritic layer, the silty/clayey layer, the weathered/fractured basement and the fresh basement which correlate d with the borehole logs in the vicinity