Evaluation of infiltration models in contaminated landscape

The infiltration models of Kostiakov, Green-Ampt, and Philip (two and three terms equations) were used, calibrated, and evaluated to simulate in-situ infiltration in nine different soil types. The Osborne-Moré modified version of the Levenberg-Marquardt optimization algorithm was coupled with the ex...

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Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2007-06, Vol.42 (7), p.983-988
Main Authors: Zadeh, Kouroush Sadegh, Shirmohammadi, Adel, Montas, Hubert J., Felton, Gary
Format: Article
Language:English
Subjects:
Algorithms
Computational fluid dynamics
Computer simulation
Estimates
Fluid flow
Hydraulics
Infiltration
Mathematical analysis
Mathematical models
Models, Theoretical
parameter optimization
Philip's equation
Soil (material)
Soil - analysis
Water Movements
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Summary:The infiltration models of Kostiakov, Green-Ampt, and Philip (two and three terms equations) were used, calibrated, and evaluated to simulate in-situ infiltration in nine different soil types. The Osborne-Moré modified version of the Levenberg-Marquardt optimization algorithm was coupled with the experimental data obtained by the double ring infiltrometers and the infiltration equations, to estimate the model parameters. Comparison of the model outputs with the experimental data indicates that the models can successfully describe cumulative infiltration in different soil types. However, since Kostiakov's equation fails to accurately simulate the infiltration rate as time approaches infinity, Philip's two-term equation, in some cases, produces negative values for the saturated hydraulic conductivity of soils, and the Green-Ampt model uses piston flow assumptions, we suggest using Philip's three-term equation to simulate infiltration and to estimate the saturated hydraulic conductivity of soils.
ISSN:1093-4529
1532-4117
DOI:10.1080/10934520701373000