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A Study on the Variation of the Coefficient of Leachate as Final Cover Systems in the Landfill  

임은진 (아름다운환경건설(주))
이재영 (서울시립대학교 환경공학부)
최상일 (광운대학교 환경공학과)
Publication Information
Journal of Soil and Groundwater Environment / v.9, no.2, 2004 , pp. 48-53 More about this Journal
Abstract
This study is objected to estimate the variation of the coefficient of leachate according to designs in landfill cover systems. Design (a) is the unsanitary landfill cover system with 50 cm soil. But Design (b), (c) are sanitary cover systems which are composed of soil top layer, drainage layer, barrier liner(Design (b): Geomembrane(1.5 mm) and compacted clay liner(30 cm), Design (c) compacted clay liner(45 cm)), gas venting layer. Quantity of leachate estimates Rational Method generally and depend on the coefficient of leachate, on one of the factors in Rational Method largely. The coefficient of leachate is defined as the leachate production ratio result from incident precipitation. To estimate the variation of the coefficient of leachate, the authors use HELP(Hydrologic Evaluation of Landfill Performance) Simulation and Pilot Test. As a result of HELP Simulation, the coefficient of leachate is 0.36∼0.42 in Design (a) and 0.03∼0.15 in Design (b), (c) according to designs in landfill cover systems and quality of barrier liner placement. These numerical values are similar to 0.13 with the coefficient of leachate in Pilot Test.
Keywords
Coefficient of leachate; Rational method; Pilot test; HELP model;
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