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ABSTRACT
This study was carried out to determine the aquifer characteristics using geoeletrical analysis in Ekpoma, Edo State. The methodology involves the use of electrical resistivity method. The employed technique for conducting electrical resistivity surveys is the Vertical Electrical Sounding (VES) method, which combines horizontal profiling and sounding approaches using Schlumberger configuration. Schlumberger electrode design were used to capture the four (4) vertical electrical soundings, respectively. Hydraulic parameters like transmissivity, transverse resistance, hydraulic conductivity and longitudinal conductance were employed in the characterization of the aquifers and determining the protective capacity. The modeling VES-1 reveals five (5) geoelectric layers. The resistivity ranges from 118.32Ωm-72249Ωm . The modeling of VES-2 reveals five (5) geoelectric layers. The resistivity ranges from 205.46Ωm-16066Ωm. The modeling of VES-3 revealed five (5) geoelctric layers. The resistivity ranges from 67.460Ωm-5470Ωm. The modeling of VES-4 revealed six (6) geoelectric layers. The resistivity ranges from 51.039Ωm-23644Ωm.The major sounding curves obtained in the study area was mostly HAA with the exception of VES-1 with AHA. The aquifer protective capacity in the vicinity of VES-1 and VES-2 were rated poor while VES-3 and VES-4 were rated weak. VES-1and VES-2 has low potential for ground water development.VES-3 and VES-4 were classified as having moderate potential for groundwater development.
