Evaluation of Resistivity Data for Delineating Potential Potable Water Accumulation Zone at Choba, Rivers State Nigeria

This study employs the evaluating of resistivity curve for delineating subsurface geologic information at Long Tennis Field at the University of Port Harcourt, using vertical electrical sounding (VES) and the geoelectric section depicted in the accompanying image, five distinct lithological layers’ topsoil, coarse sand, clay, gravel, and conglomerate were identified based on their resistivity values and thickness. The resistivity profile exhibits an A-type curve, indicating a progressive increase in resistivity with depth, which is characteristic of stratification within the Benin Formation of the Niger Delta Basin. Notably, the highly resistive layer at approximately 90m depth, as shown in the image, suggests a potential uncontaminated aquifer, making it a viable target for groundwater extraction. Conversely, the third layer, exhibiting the lowest resistivity, may indicate the presence of conductive materials due to increased moisture content or contamination. The findings of this research are significant for groundwater exploration, environmental assessments, and infrastructure development, offering crucial insights into lithological variations that influence fluid movement and retention. Additionally, the study underscores the importance of geophysical methods in evaluating subsurface conditions for sustainable urban planning and hydrogeological investigations. The image reinforces the interpretation of subsurface variations, visually illustrating the resistivity distribution across depths. Future work should incorporate borehole validation and hydrochemical analyses to improve aquifer characterization and ensure optimal groundwater utilization. These findings contribute to the broader understanding of sedimentary dynamics within the Niger Delta region, enhancing geotechnical stability assessments and supporting effective land-use strategies.