Two Dimensional Geoelectrical Resistivity Investigation of University of Benin Golf Course at Ugbowo in Benin City, Edo State, Nigeria using Wenner Alpha and Wenner Schlumberger Configuration
Authors: Ehilenboadiaye JI, Ohioma JO, Omoigiade CI
The purpose of this study was to determine the subsurface resistivity distribution from a 2-D imaging survey and determine the tomography /images of University of Benin Golf course, Benin City, Edo State Nigeria by comparing two arrays. Wenner Schlumberger and Wenner Alpha configuration profiling methods were used to elucidate the lateral changes in the subsurface resistivity. From these measurements, the true resistivity of the subsurface was determined by inversion of the measured apparent resistivity values using computer inversion software (RES2DINV). From the images obtained, it was clearly observed that, different configurations used to map the same region can give different contour shapes. The Wenner Alpha configuration has relatively poor horizontal resolution as the electrode spacing is increased by virtue of its small geometric factor, while the Wenner Schlumberger configuration shows high resistivity values as a result of its high geometric factor which is observed as the electrode spacing increases.
Affiliations: Department of Physics, Ambrose Alli University, Ekpoma, Edo State, Nigeria.
Keywords: Geoelectrical, Tomography, Array, Two-dimensional, Subsurface
Published date: 2019/06/30