VERTICAL ELECTRICAL SOUNDING TECHNIQUE FOR AQUIFER DETERMINATION IN A SEDIMENTARY TERRAIN: ISIKUKU IN EDO STATE AS A CASE STUDY.

ABSTRACT

Geoelectrical resistivity survey was carried out at the University of Benin Ugbowo campus using Electrical Resistivity Method (ERM), with the aim of characterizing the subsurface lithology. The Schlumberger configuration array techniques was employed to obtain deeper lithologic information (Vertical Electrical Sounding). Three geo-electric layers can be interpreted using curve matching, and the A and AH curves were the resultant curve type, which was supported by the DiproWin and WINRES software. Also, the lithology of the three layers detected consists of lateritic top soils, clayey sands, sands, and alluvium.  Data obtained from the survey revealed that VES 1 has the least thickness value of 0.36169 m in its first layer, composed of the Benin Lateritic top soil, while the fifth layer of VES 3 has the highest thickness of with 84.605 m and depth-to-top value of 40.361 m indicative of the most viable potential for groundwater accumulation