Investigating groundwater pollution at an open dumpsite using 2D geoelectrical resistivity imaging and vertical electrical sounding

K M Bakare,A P Aizebeokhai,K D Oyeyemi

doi:10.1088/1742-6596/1299/1/012077

K M Bakare, A P Aizebeokhai + Show 1 more

Open Access

https://doi.org/10.1088/1742-6596/1299/1/012077

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Abstract

Geoelectrical resistivity survey has been conducted within the Kurata dump site in Ota, south-western Nigeria. This present study focuses on the use of 2D resistivity imaging and Vertical Electrical Sounding to delineate conductive leachate point and degree of movement within the subsurface for conceivable groundwater pollution. The 2D resistivity survey was carried out using the ABEM Terrameter (SAS 1000/4000) System with multiple-gradient array electrode configuration. The Vertical Electrical Sounding was conducted using the schlumberger electrode configuration. One 2-D imaging profile of length 100m and one Vertical Electrical Sounding of length 200m were acquired on the established traverse. The resistivity data was inverted utilizing RES2DINV and WinResist to obtain the inverse model resistivity distribution. The 2D inverse resistivity models of the subsurface showed that the study site has a multi-layered aquifer system, four geoelectrical layers were inferred from the resistivity imaging and they are lateritic clay, clayey sand, sandy clay and coarse sand units. There is one aquifer system about 13 m which is highly polluted. The unpolluted aquifer system is localized around 19 m with inverted resistivity range 498Ωm – 685Ωm in the traverse. Also there might be conceivable sullying of deep groundwater system in the long term if appropriate moderation procedures are not thought about at the area.

Highlights

The existence of life depends importantly on water and as the population rises, the call for clean and reliable water increases
This present study focuses on the use of 2D resistivity imaging and Vertical Electrical Sounding to delineate conductive leachate point and degree of movement within the subsurface for conceivable groundwater pollution
Perhaps the pollution of groundwater sources by means of leachate from landfills have been for a long time as documented by [1,2] they looked into landfill practices and considered it as the filling of depressions to dispose solid waste

Summary

Introduction

The existence of life depends importantly on water and as the population rises, the call for clean and reliable water increases. Perhaps the pollution of groundwater sources by means of leachate from landfills have been for a long time as documented by [1,2] they looked into landfill practices and considered it as the filling of depressions to dispose solid waste. Landfill practices are considered as ways to manage the disposal of waste and this is far from the expected goal in many developing countries [3]: When considering a state-of-the-art landfill system, several parameters are considered

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