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AN INVESTIGATION OF THE CONTAMINANT TRANSPORT FROM THE WASTE DISPOSAL SITE, USING FEMLAB

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Author(s): MD. TAUHID-UR-RAHMAN

Journal: Journal of Applied Sciences in Environmental Sanitation
ISSN 0126-2807

Volume: 4;
Issue: 2;
Start page: 79;
Date: 2009;
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Keywords: Numerical model | groundwater-pollution | leachate | unmanaged solid waste

ABSTRACT
Untreated landfill leachate produced typically at the unmanaged waste disposal site may pose substantial contamination hazards not only to the nearby surface water but also to the groundwater system. This study attempts to focus on the potential risk arising with the spreading of contaminant generated at the solid waste disposal site in the lake Kiyanja watershed which has usually been considered as the key source of supplying water to the surrounding community of the Masindi district of Uganda. A numerical model was developed with the help of FEMLAB to study the transport of the leached contaminants from the waste disposal site through the subsurface soil. The model shows that the contamination plume needs around 40 hours to infiltrate through the saturated groundwater after being released from the source. Further, it needs at least 183 hours to reach close to the nearby lake water. Although, the deep groundwater currently seems to be protected, but it needs adequate attention while installing deep wells through the clay layers to make it remained safe for the future. It can however be mentioned that to protect and preserve the groundwater resources, the waste disposal site should immediately be relocated elsewhere.
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