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Evaluation of Groundwater Pollution Near Municipal Solid Waste Landfill Site Using ERI Technique:A Case Study in Southwestern Nigeria


Affiliations
1 Department of Physics, Covenant University, P. M. B. 1023, Ota, Ogun State, Nigeria
2 Department of Geoscience, University of Lagos, Nigeria
 

Direct current (DC) geoelectrical resistivity measurements have been conducted to investigate groundwater contamination at a non-engineered, open dumpsite facility in Lagos, southwestern Nigeria. The inferred lithologies from the tomographic imaging include topsoil, sandy-clay and sandy units; the delineated low resistive top layer has resistivity values ranging from 0.64-7.5 Ωm typical of leachates and localized within sandy-clay unit extending to depths of 42-52 metres. The groundwaters from the shallow aquifer units are observed to be hazardously contaminated in area where household, market and industrial wastes are known to be disposed improperly. Thus, deeper aquifer units beyond the contaminated layers should be drilled with screened borehole in order to avert immediate groundwater pollution. This study has further demonstrated the efficacy of using surface geophysical techniques to map contaminant plume in dumpsites and determine the extent of groundwater contamination.

Keywords

Groundwater Contamination, Health Risk, Landfill, Solid Waste, ERI Technique.
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  • Evaluation of Groundwater Pollution Near Municipal Solid Waste Landfill Site Using ERI Technique:A Case Study in Southwestern Nigeria

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Authors

Kehinde D. Oyeyemi
Department of Physics, Covenant University, P. M. B. 1023, Ota, Ogun State, Nigeria
Ahzegbobor P. Aizebeokhai
Department of Physics, Covenant University, P. M. B. 1023, Ota, Ogun State, Nigeria
Oluwabunmi F. Attat
Department of Geoscience, University of Lagos, Nigeria

Abstract


Direct current (DC) geoelectrical resistivity measurements have been conducted to investigate groundwater contamination at a non-engineered, open dumpsite facility in Lagos, southwestern Nigeria. The inferred lithologies from the tomographic imaging include topsoil, sandy-clay and sandy units; the delineated low resistive top layer has resistivity values ranging from 0.64-7.5 Ωm typical of leachates and localized within sandy-clay unit extending to depths of 42-52 metres. The groundwaters from the shallow aquifer units are observed to be hazardously contaminated in area where household, market and industrial wastes are known to be disposed improperly. Thus, deeper aquifer units beyond the contaminated layers should be drilled with screened borehole in order to avert immediate groundwater pollution. This study has further demonstrated the efficacy of using surface geophysical techniques to map contaminant plume in dumpsites and determine the extent of groundwater contamination.

Keywords


Groundwater Contamination, Health Risk, Landfill, Solid Waste, ERI Technique.

References