Modeling of leachate generation from MSW landfills by a 2-dimensional 2-domain approach

Fellner, Johann

doi:10.1016/j.wasman.2010.03.020

Title: Modeling of leachate generation from MSW landfills by a 2-dimensional 2-domain approach

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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{sup 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{sub s} = 300 m/d) and zero retention capacity, while the bulk ofmore »« less

Authors:

Fellner, Johann ^[1]

Vienna University of Technology, Institute for Water Quality, Resources and Waste Management, Karlsplatz 13/226, A-1040 Vienna (Austria)

Publication Date:: Mon Nov 15 00:00:00 EST 2010

OSTI Identifier:: 21421598

Resource Type:: Journal Article

Journal Name:: Waste Management

Additional Journal Information:: Journal Volume: 30; Journal Issue: 11; Other Information: DOI: 10.1016/j.wasman.2010.03.020; PII: S0956-053X(10)00189-3; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0956-053X

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; ANISOTROPY; COMPUTER CODES; EFFICIENCY; FLOW MODELS; HYDRAULIC CONDUCTIVITY; LEACHATES; MUNICIPAL WASTES; ONE-DIMENSIONAL CALCULATIONS; PERMEABILITY; SANITARY LANDFILLS; SOLID WASTES; TWO-DIMENSIONAL CALCULATIONS; WATER; DISPERSIONS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; MANAGEMENT; MATHEMATICAL MODELS; MIXTURES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SOLUTIONS; WASTE DISPOSAL; WASTE MANAGEMENT; WASTES

Citation Formats


                    Fellner, Johann, and Brunner, Paul H., E-mail: paul.h.brunner@tuwien.ac.a. Modeling of leachate generation from MSW landfills by a 2-dimensional 2-domain approach.  United States: N. p., 2010. 
        Web.  doi:10.1016/j.wasman.2010.03.020.

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                    Fellner, Johann, & Brunner, Paul H., E-mail: paul.h.brunner@tuwien.ac.a. Modeling of leachate generation from MSW landfills by a 2-dimensional 2-domain approach.  United States.  https://doi.org/10.1016/j.wasman.2010.03.020

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                    Fellner, Johann, and Brunner, Paul H., E-mail: paul.h.brunner@tuwien.ac.a. 2010.  
        "Modeling of leachate generation from MSW landfills by a 2-dimensional 2-domain approach".  United States.  https://doi.org/10.1016/j.wasman.2010.03.020.

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@article{osti_21421598,

  title        = {Modeling of leachate generation from MSW landfills by a 2-dimensional 2-domain approach},

  author       = {Fellner, Johann and Brunner, Paul H., E-mail: paul.h.brunner@tuwien.ac.a},

  abstractNote = {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{sup 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{sub s} = 300 m/d) and zero retention capacity, while the bulk of the landfill (matrix domain) is characterized by low permeability (K{sub s} = 0.1 m/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.},

  doi          = {10.1016/j.wasman.2010.03.020},

  url          = {https://www.osti.gov/biblio/21421598},
  journal      = {Waste Management},

  issn         = {0956-053X},

  number       = 11,

  volume       = 30,

  place        = {United States},

  year         = {Mon Nov 15 00:00:00 EST 2010},

  month        = {Mon Nov 15 00:00:00 EST 2010}

}

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