Improved Compartmental Modeling and Application to Three-Phase Contaminant Transport in Unsaturated Porous Media
Publication: Journal of Environmental Engineering
Volume 132, Issue 2
Abstract
The compartmental modeling approach has been widely used for simulating contaminant transport in porous media and surface waters. Yet a commonly used compartmental model that has only first-order accuracy may introduce considerable numerical errors under certain circumstances. Following a review of compartmental systems and compartmental modeling methodologies, performance and limitations of such a compartmental model are discussed. In particular, improvement approaches, including multipoint, high-order, linear, and nonlinear methods, are presented in detail. Finally, a number of testing problems are examined and various compartmental models that describe three-phase (dissolved, adsorbed, and vapor phases) contaminant transport in unsaturated porous media are compared with each other and also with standard numerical and analytical counterparts. The comparisons highlight the accuracy, applicability, and limitations of different compartmental models.
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Acknowledgments
This work was supported by the U.S. Environmental Protection Agency (USEPA) (Grant No. R819658) Center for Ecological Health Research at the University of California, Davis, and the UC Toxic Substances Research and Teaching Program. Although the information in this document has been funded in part by the USEPA, it may not necessarily reflect the views of the agency and no official endorsement should be inferred.
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© 2006 ASCE.
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Received: Jul 29, 2004
Accepted: May 23, 2005
Published online: Feb 1, 2006
Published in print: Feb 2006
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