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dc.contributor.authorLin, Ye-Chenen_US
dc.contributor.authorYeh, Hund-Deren_US
dc.date.accessioned2020-10-05T01:59:52Z-
dc.date.available2020-10-05T01:59:52Z-
dc.date.issued2020-07-01en_US
dc.identifier.issn0022-1694en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.jhydrol.2020.124873en_US
dc.identifier.urihttp://hdl.handle.net/11536/154999-
dc.description.abstractLandfill leachate often contains soluble hazardous substances. Geomembrane (GM) liner is commonly used to protect the subsurface water. The leachate however may diffuse through the GM and enter the underlying natural soil liner. Analytical or numerical modeling for the leachate transport in the soils helps assess the associated risk to groundwater resources. The analytical model has the advantages of simplicity and easy to implement over the numerical model. Yet there is only an analytical model developed for describing the leachate migration through the GM to the unsaturated soil liner. Its solution however is difficult to evaluate. We herein develop a new analytical model to include the sorption effect and simplify the leachate transport through the GM as a Robin-type boundary condition in the model. The solution of the model is in a simple form and very easy to evaluate. The present solution is then compared with a finite-difference solution and the existing solution. The effect of the retardation factor on the leachate migration is investigated. A sensitivity analysis is also performed to assess the effects of model parameters on the leachate distribution. Finally, the present solution is adopted to estimate the transport parameters based on the data from bench-scale composite liner experiments. Landfill leachate often contains soluble hazardous substances. Geomembrane (GM) liner is commonly used to protect the subsurface water. The leachate however may diffuse through the GM and enter the underlying natural soil liner. Analytical or numerical modeling for the leachate transport in the soils helps assess the associated risk to groundwater resources. The analytical model has the advantages of simplicity and easy to implement over the numerical model. Yet there is only an analytical model developed for describing the leachate migration through the GM to the unsaturated soil liner. Its solution however is difficult to evaluate. We herein develop a new analytical model to include the sorption effect and simplify the leachate transport through the GM as a Robin-type boundary condition in the model. The solution of the model is in a simple form and very easy to evaluate. The present solution is then compared with a finite-difference solution and the existing solution. The effect of the retardation factor on the leachate migration is investigated. A sensitivity analysis is also performed to assess the effects of model parameters on the leachate distribution. Finally, the present solution is adopted to estimate the transport parameters based on the data from bench-scale composite liner experiments.en_US
dc.language.isoen_USen_US
dc.subjectLandfill leachateen_US
dc.subjectGeomembrane lineren_US
dc.subjectUnsaturated soil lineren_US
dc.subjectRobin-type conditionen_US
dc.subjectRetardation factoren_US
dc.titleA simple analytical solution for organic contaminant diffusion through a geomembrane to unsaturated soil liner: Considering the sorption effect and Robin-type boundaryen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.jhydrol.2020.124873en_US
dc.identifier.journalJOURNAL OF HYDROLOGYen_US
dc.citation.volume586en_US
dc.citation.spage0en_US
dc.citation.epage0en_US
dc.contributor.department環境工程研究所zh_TW
dc.contributor.departmentInstitute of Environmental Engineeringen_US
dc.identifier.wosnumberWOS:000544258100035en_US
dc.citation.woscount0en_US
Appears in Collections:Articles