Contaminant Leaching Model for Dredged Material Disposal Facilities
Publication: Journal of Environmental Engineering
Volume 125, Issue 9
Abstract
This paper describes the hydrologic evaluation of leachate production and quality model, a screening-level tool to simulate contaminant leaching from a confined disposal facility (CDF) for dredged material. The model combines hydraulics, hydrology, and equilibrium partitioning, using site-specific design specifications, weather data, and equilibrium partitioning coefficients from the literature or from sequential batch or column leach tests of dredged material. The hydraulics and hydrology are modeled using Version 3 of the hydrologic evaluation of landfill performance model. The equilibrium partitioning model includes provisions for estuarine sediments that have variable distribution coefficients resulting from saltwater washout. Model output includes contaminant concentrations in the CDF profile, contaminant concentration and mass releases through the bottom of the CDF, and contaminant concentrations and masses captured by leachate collection systems. The purpose of the model is to provide sound information for evaluating the potential leachate impacts on ground water at dredged material CDFs and the effectiveness of leachate control measures.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 125 • Issue 9 • September 1999
Pages: 835 - 844
History
Received: Aug 20, 1998
Published online: Sep 1, 1999
Published in print: Sep 1999
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