Hydrogeological studies on the mechanical behavior of landfill gases and leachate of the Nanjido Landfill in Seoul, Korea |
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Authors: | K K Lee Y Y Kim H W Chang S Y Chung |
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Institution: | (1) Department of Geological Sciences, Seoul National University, Seoul 151-742, Korea, KR;(2) Department of Applied Geology, Pusan National Fishery's University, Pusan 608-737, Korea, KR |
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Abstract: | The Nanjido Landfill is the largest uncontrolled landfill in Korea and it causes various kinds of environmental problems.
Landfill gases and leachate are recognized as the most serious environmental problems associated with the landfill. This study
employs a series of numerical models and uses test data to interpret the distribution and flow of landfill gases and leachate.
Leachate seepage appears about 40–60 m higher than the estimated basal groundwater table. Thus, seepage data indicate that
perched or floating leachate layers are formed in the unsaturated zone of the landfill. The leachate production rate is estimated
using infiltration test data and a model for unsaturated groundwater flow. Geochemical data indicate that the landfill leachate
degrades the basal groundwater quality along the downgradient zone. The environmental impact of the leachate on river water
is estimated.
Received: 17 June 1996 · Accepted: 2 October 1996 |
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Keywords: | Nanjido Landfill Landfill leachate Landfill gas Environmental impact |
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