Models of Landfill Leaching: Moisture Flow and Inorganic Strength

by William A. Straub, Project Engr.; Wright-Pierce Engrs., 25 Vaughn Mall, Portsmouth, N.H. 03801,
Daniel R. Lynch, (M.ASCE), Asst. Prof.; Thayer School of Engrg., Dartmouth Coll., Hanover, N.H. 03755,

Serial Information: Journal of the Environmental Engineering Division, 1982, Vol. 108, Issue 2, Pg. 231-250

Document Type: Journal Paper


Mathematical models are applied to the movement and inorganic contamination of moisture in sanitary landfills situated above the water table. The models are based on simple well-mixed reactor concepts, and on unsaturated flow and transport in porous media. Computer simulations are obtained for laboratory-scale experimental landfills reported by others. General agreement between simulated and observed results indicates that leachate behavior is explainable in terms of fundamental transport processes. The roles of moisture retention in the landfill and dilution by infiltrating water are shown to be of primary importance in understanding and predicting leachate quantity and quality.

Subject Headings: Landfills | Leaching | Moisture | Water pollution | Water quality | Mathematical models | Porous media flow | Leachates

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