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• W2050614674 startingPage "2084" @default.
• W2050614674 abstract "The flow of water through Municipal Solid Waste (MSW) landfills is highly non-uniform and dominated by preferential pathways. Thus, concepts to simulate landfill behavior require that a heterogeneous flow regime is considered. Recent models are based on a 2-domain approach, differentiating between channel domain with high hydraulic conductivity, and matrix domain of slow water movement with high water retention capacity. These models focus on the mathematical description of rapid water flow in channel domain. The present paper highlights the importance of water exchange between the two domains, and expands the 1-dimensional, 2-domain flow model by taking into account water flows in two dimensions. A flow field consisting of a vertical path (channel domain) surrounded by the waste mass (matrix domain) is defined using the software HYDRUS-2D. When the new model is calibrated using data sets from a MSW-landfill site the predicted leachate generation corresponds well with the observed leachate discharge. An overall model efficiency in terms of r(2) of 0.76 was determined for a simulation period of almost 4 years. The results confirm that water in landfills follows a preferential path way characterized by high permeability (K(s)=300 m/d) and zero retention capacity, while the bulk of the landfill (matrix domain) is characterized by low permeability (K(s)=0.1m/d) and high retention capacity. The most sensitive parameters of the model are the hydraulic conductivities of the channel domain and the matrix domain, and the anisotropy of the matrix domain." @default.
• W2050614674 created "2016-06-24" @default.
• W2050614674 creator A5029835314 @default.
• W2050614674 creator A5078765308 @default.
• W2050614674 date "2010-11-01" @default.
• W2050614674 modified "2023-10-18" @default.
• W2050614674 title "Modeling of leachate generation from MSW landfills by a 2-dimensional 2-domain approach" @default.
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• W2050614674 doi "https://doi.org/10.1016/j.wasman.2010.03.020" @default.
• W2050614674 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20385480" @default.
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