Subsurface Depth Delineation for Aquifer Prospecting At Redeemed Church Field, Choba, Rivers State

This study investigates subsurface depth delineation for aquifer prospecting at Redeemed Church Field, Choba, Rivers State, with the aim of identifying water-bearing formations to support sustainable groundwater development. The objectives included acquiring resistivity data, interpreting geoelectric curves, and recommending optimal borehole depths. Using the Vertical Electrical Sounding (VES) method with a Schlumberger array, resistivity data were collected and processed with geophysical software to generate subsurface models. The results revealed five distinct geoelectric layers, with resistivity values ranging from 53.5Ωm to 773Ωm. The fourth layer, characterized by high resistivity and significant thickness, was interpreted as the principal aquifer zone, likely composed of coarsegrained sandstone. The resistivity curve resembled an HK-type, typically associated with aquiferbearing formations, and the geoelectric section confirmed the lateral continuity and depth of the aquifer. The study area, located within the Benin Formation of the Niger Delta Basin, exhibits favorable hydrogeological conditions due to its high porosity and permeability. The findings demonstrate the effectiveness of resistivity methods in delineating subsurface structures and identifying viable aquifer zones. Based on the results, it is recommended that boreholes be drilled to target the fourth geoelectric layer, and that further hydrogeological testing and regular groundwater monitoring be conducted to ensure sustainable usage. This research provides a scientific basis for groundwater exploration and contributes to informed water resource management in the region.