Determination of water table using electrical sounding technique: A case study of Afuze Edo State, Nigeria
This work investigated water-bearing formation and determined the water table in Afuze, a major town in Edo state, Nigeria, using electrical sounding techniques with the schlumberger electrode configuration The ABEM SAS 300B Terrameters was used in this work to carry out Resistivity soundings from several locations which were evenly distributed within the study area. The value of the apparent resistivities got, were computed manually and with computer and plotted on log-log graph, all of which are shown in this work. The interpretation was done qualitatively and quantitatively by comparison of resistivity curve type and curved matching techniques respectively. Models were generated for computer iterative technique and Borehole data were also collected using spontaneous potential logging method as well as driller's log in some selected sites within the study area so as to correlate surface measurement with borehole records. Analysis based on three depth related resistivity contour VES, as well as selected cross sectional profiles confirm the existing dual regional geological environment of the area. Finally, it was established, from The result obtained that the water bearing formation at Afuze was mainly sand and was found at depth between 32.6m-50m.
Journal of the Nigerian Association of Mathematical Physics Vol. 9 2005: pp. 457-464