ABSTRACT
GEOPHYSICAL MAPPING OF SELECTED DUMPSITE AND ABATTOIR OF GROUNDWATER CONTAMINATION AND THEIR IMPACT IN EFFURUN AND ITS ENVIRONS, SOUTHERN NIGERIA.
Journal: Malaysian Journal of Geosciences (MJG)
Author: Olaseni, V.B. And Jeremiah Lucky
This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
DOI: 10.26480/mjg.01.2025.01.09

This research evaluates groundwater quality in Effurun, southern Nigeria, particularly focusing on contamination from solid waste sources such as dumpsites and abattoirs in Osubi, Ugbomro, and Agbarho. The geophysical assessments to identify contamination levels in the study area were employed by integrating Wenner-Werner arrays and vertical electrical sounding (VES) data. Using the WINRESIST and RES 2D inversion software, resistivity models revealed significant contamination at values below 50 Ohm-meters, with lateral extents ranging from 49 to 85 meters and depths up to 6.39 meters. Notably, the Osubi abattoir exhibited the highest contamination level, while some areas in Ugbomro dumpsite and Agbarho dumpsite remained less affected. The findings highlight the vulnerability of unconfined aquifers characterized by weak protective layers. The subsurface pollution in the study areas necessitates urgent improvements in waste management and groundwater protection strategies. Additionally, the results from Dan Zarrouk parameters indicated low aquifer protective capacity in key areas, correlating with observed contamination. This study underscores the critical need for targeted interventions to safeguard groundwater resources amid rising industrialization and waste generation in the region.