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Abstract
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Article Information:
Mapping and Monitoring of Leachate Plume Migration at an Open Waste Disposal Site Using Non-Invasive Methods
S.I. Jegede, O. Ujuanbi, N.K. Abdullahi and R.E. Iserhien-Emekeme
Corresponding Author: S.I. Jegede
Submitted: 2011 April, 18
Accepted: 2011 June, 10
Published: 2012 January, 01 |
Abstract:
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A geophysical survey was carried out in a potentially polluted open waste disposal site in a densely
populated part of Zaria, Kaduna State, Nigeria with the aim of imaging the subsurface to delineate leachate
plumes and their pathways into the groundwater at shallow depths and to monitor the extent of the vertical and
lateral migration over a period of ten months. The survey applied the Induced Polarization and Electrical
Resistivity tomography using 2D approach. The horizontal and vertical extent of leachate plumes were
delineated by the geo-electrical imaging as a response to the varying electrical resistivity in the contaminated
area. The migration rates of 2.05 m/month, in the lateral direction as well as 0.53 m/month in the vertical
direction, were obtained. The rate of migration in the horizontal direction was higher than that in the vertical
direction by a very significant margin of 1.42 m/month. The vertical motion was impeded by the presence of
clay as revealed by the inverted resistivity models with resistivity values in the range of 82.0 to 100. The
Induced Polarization survey result indicates that the waste in the dumpsite was buried to as much depth as over
10.0 m. The rate of migration was found to depend on the compaction of the soil texture, the presence of loose
soil, fractures, depressions, undulations and dipping topography.
Key words: Electrical resistivity tomography, induced polarization, landfill, leachate plumes, Samaru, time lapse,
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Cite this Reference:
S.I. Jegede, O. Ujuanbi, N.K. Abdullahi and R.E. Iserhien-Emekeme, . Mapping and Monitoring of Leachate Plume Migration at an Open Waste Disposal Site Using Non-Invasive Methods. Research Journal of Environmental and Earth Sciences, (01): 26-33.
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ISSN (Online): 2041-0492
ISSN (Print): 2041-0484 |
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