TWO-DIMENSIONAL GEO-ELECTRICAL IMAGING SURVEY FOR SHALLOW SITE INVESTIGATION AT UWELU EGOR L.G A, EDO STATE, NIGERIA.

A geoelectrical imaging survey was conducted at Uwelu and its environs in Egor Local Government Area of Edo State, Nigeria, for Shallow site investigation in order to determine the applicability of 2-D resistivity imaging in studying the subsurface, which in turn determines how feasible the area would be in terms of erection of structures that will stand the test of time. The area is underlain mainly with low resistivity materials with minor intrusion high resistivity materials like gravel, limestone basalt and slate. Geophysical survey was carried out using 2-D electrical resistivity imaging technique. The Wenner Alpha configuration was employed. Field data were obtained for ten electrical imaging lines, at Uwelu market area in Egor Local Government Area, subjected to inversion, in order to remove geometrical effects from the pseudo-section and produce an image of true depth and true formation resistivity. The 2-D electrical investigation at the survey site showed that the soil lithology compartment will be a good site for big building and other construction works even for shallow site works.