Seashore MSW landfill using drainage layer and thick soil cover—Leachate containment and post-closure land use

Abstract

Environmental conservation and post-closure land use are important considerations in seashore MSW landfills. A system consisting of a drainage layer and thick soil cover installed over a waste layer is considered an effective measure for the containment of waste leachate and post-closure land use. In this study, the effectiveness of such a system of drainage layer and thick soil cover was evaluated via laboratory experiments and numeral analysis. Laboratory experimental results indicated that water discharged through the drainage layer achieves satisfactory quality, as waste leachate can be properly contained in the waste layer owing to the function of the drainage layer. Numerical analysis also revealed the effectiveness of the drainage layer in containing waste leachate. The proposed system is expected to perform satisfactorily in terms of leachate containment and post-closure land use.