Geoelectrical Investigation of the GroundwaterPotential in Mowe, Ogun State, Nigeria

摘要

Electrical resistivity survey was carried out to delineate subsurface layers and to determine the ground water potential in the study area. The study was carried out using the ABEM SAS 1000 terrameter which worked on 16 vertical electrical sounding (VES) points within the area. A maximum distance of 550m current electrode spread was adopted for this survey. The result showed the presence of four geoelectric layers with the resistivity of the first layer ranging from 25.54Ωm to 619.45Ωm and thickness of 0.14-9.21m representing topsoil. The second geoelectric layer has resistivity ranging from 20.94Ωm to 706.82Ωm and thickness of 2.58 to 35.36m representing laterite. The third geoelectric layer has resistivity ranging from 12.29Ωm to 598.93Ωm and thickness of 3.33 to 58.06m representing sandy clay. The fourth geoelectric layer has resistivity ranging from 12.1Ωm to 1980.52Ωm and thickness of 11.4 to 45m representing sand. The depth to the aquifers are 13.11m, 55.31m, 6.35m, 50.28m, 51.08m and 28.01m in VES 1, 2, 6, 9, 11 and 16 respectively.