
	Journal of Applied Sciences
	Year: 2011 \| Volume: 11 \| Issue: 22 \| Page No.: 3755-3764 DOI: 10.3923/jas.2011.3755.3764

Geoelectrical Imaging at an Abandoned Waste Dump Site in Ibadan, Southwestern Nigeria

Michael A. Oladunjoye, Abel I. Olayinka and Sikiru A. Amidu

Abstract: Leachate-effluent from refuse dump site is an important source of groundwater pollution. Consequently, assessing the impact of leachate is an active area of groundwater research. Geoelectrical imaging was carried out at an abandoned waste dump site in Ibadan, southwestern Nigeria, with the aim of determining how accurately electrical measurements could delineate the influx of leachate into groundwater and surface water. Eight electrical-resistivity profiles were measured. Four of the traverses were conducted on the dump site whereas two traverses were measured towards the lower side to assess possible ingress of the leachate. The other two lines were measured about 300 m from the site to serve as control. Elevation data were collected using Global Positioning System. The resistivity data were inverted using the least-square technique. The inversion delineated regions of low resistivity (<20 Ωm) believed to be leachate derived from decomposed waste. Non-degraded refuse occurred as isolated regions of higher resistivity (>20 Ωm). The highest resistivity regions (>100 Ωm) were interpreted as regolith derived from chemical weathering of the crystalline bedrock. Resistivity-derived thickness of the leachate zone was consistent with the thickness derived from the elevation data. It could be inferred that there was high concentration of leachate towards the lower elevation hence the adjoining stream is prone to pollution. This study showed that 2D imaging can be effective in imaging pollution plumes around refuse dump sites. The method can be useful to assess opportunity for remediation measures in situations where the leachate has reached the groundwater system.

PDF Fulltext XML References Citation Report Citation

RELATED ARTICLES:

•	Contaminant Transport from Disposal Sites and Potential Impact on Groundwater

•	Physicochemical and Microbial Characteristics of Leachate-Contaminated Groundwater

•	Underground Water Exploration Using Electrical Resistivity Method in Edo State, Nigeria

•	Assessment of Groundwater Quality Due to Municipal Solid Waste Landfills Leachate

•	Electrical Imaging Resistivity Study at the Coastal Area of Sungai Besar, Selangor, Malaysia

•	Assessing Aquifer Vulnerability to Contaminants near Solid Waste Landfill Sites in a Coastal Environment, Port Harcourt, Nigeria

How to cite this article:

Michael A. Oladunjoye, Abel I. Olayinka and Sikiru A. Amidu, 2011. Geoelectrical Imaging at an Abandoned Waste Dump Site in Ibadan, Southwestern Nigeria. Journal of Applied Sciences, 11: 3755-3764.

DOI: 10.3923/jas.2011.3755.3764

URL: https://scialert.net/abstract/?doi=jas.2011.3755.3764

COMMENT ON THIS PAPER

Navigation


		Online First
		Current Issue
		Previous Issues
		Editorial Board
		Submit a Manuscript
		Guide to Authors
		Subscribe to E-alerts

Indexed In


		AGRIS
		ASCI-Database
		Asian Digital Library
		Google Scholar

Science Alert