ABTRACT
This study proposes the use of 2D Electrical Tomography (ET) survey as a cost-efficient and non-invasive method for mapping aquifer layers in University of Benin (Uniben) Ugbowo area of Benin City Nigeria.
The Ugbowo area in Benin City, Nigeria, relies heavily on groundwater resources to meet its water needs. However, understanding the distribution of aquifer layers beneath the surface is crucial for effective water resource management.
The main goal of this research is to evaluate subsurface geology and delineate aquifer layers by conducting 2D Electrical Tomography surveys. This involves measuring electrical resistivity at various points across the study area using electrode arrays (wenner array and Dipole-dipole array).The collected data were processed using inversion algorithms to produce detailed electrical resistivity images. These images were then be interpreted to identify structures indicative of aquifer layers.
Moreover, the study seeks to combine the geophysical data with existing geological information to improve the accuracy of aquifer layer mapping. By correlating resistivity variations with geological formations, the research aims to provide insights into the spatial distribution and characteristics of aquifer layers in the area.
From the result, a comprehensive 2D electrical resistivity model of both Wenner and Dipole-Dipole array were generated, illustrating subsurface structure and aquifer layers such as sandstone, clay, limestone and slight indication of dolomite.
From these indicative layers, the study area may hold good prospect for underground water to sink additional borehole to further subsidize the existing once.
