Geo-electrical investigation of Leachate Impact on Groundwater: A Case Study of Ile-Epo Dumpsite, Lagos, Nigeria.
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Date
2011
Authors
Adeoti, L
Oladele, S
Ogunlana, F.O
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Applied Sciences and Environmental Management.
Abstract
In the past few decades, disposal sites have been filled with household refuse and different
kinds of potentially dangerous industrial waste in an uncontrolled manner which poses an enormous risk for the
environment, and are the main sources for groundwater contamination. With the aim of assessing impact of
leachate on the underlying aquifers by determining and delineating possible leachate infiltration into the
aquifer matrix ,Constant Spacing Traversing (CST) was carried out using Wenner array and spacing between
10-60 m along four 160 m – 180 m profiles. The results revealed the aquifer is characterized by low resistivity
response generally below 4.5 ohm-m depicting possible contamination of the underlying aquifer from Oke-Odo
landfill. The surface of the waste landfill is characterized by differential decomposition of waste as zones of
advanced decomposition and fresh waste are reflected as low and high resistivity respectively. The absence of
leachate in the aquifer 100 m from the studied area suggests that the leachate has not spread to this area,
therefore, safe for groundwater exploitation. This study demonstrated the expeditiousness and effectiveness of
the resistivity technique as a tool for geo-environmental mapping of leachate.
Description
Keywords
advanced decomposition , landfill , disposal sites , leachate , CST , risk
Citation
Adeoti, L., Oladele, S., & Ogunlana, F. O. (2011). Geo-electrical investigation of Leachate Impact on Groundwater: A Case Study of Ile-Epo Dumpsite, Lagos, Nigeria. Journal of Applied Sciences and Environmental Management, 15(2).