Chapter
Apr 26, 2012
Lysimeters versus Actual Earthen Caps: Numerical Assessment of Soil Water Storage
Authors: Ramil G. Mijares, Milind V. Khire, Ph.D. [email protected]., and Terry JohnsonAuthor Affiliations
Publication: GeoFlorida 2010: Advances in Analysis, Modeling & Design
Abstract
Lysimeters are commonly used for field-scale assessment of water balance of earthen caps, commonly referred to as evapotranspirative (ET) caps. While lysimeters are the only direct tool to measure percolation through a cap, the lower hydraulic boundary of a lysimeter is significantly different compared to an actual ET cap. In this study, numerical simulations of water balance of lysimeters and ET caps were carried out using Vadose/W for a range of hydraulic properties of the soils and waste. The numerical results suggest that due to the presence of waste below the cap, the soil water storage of an ET cap is greater than an equivalent lysimeter. This greater water storage capacity in an actual ET cap results in lower percolation than for an equivalent lysimeter.
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Published In
GeoFlorida 2010: Advances in Analysis, Modeling & Design
Pages: 2849 - 2858
Copyright
© 2010 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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Authors
Affiliations
Ramil G. Mijares
Graduate Research Assistant, Department of Civil & Environmental Engineering, Michigan State University, 3246 Engineering Building, E. Lansing, MI 48824
P.E.
Associate Professor, Department of Civil & Environmental Engineering, Michigan State University, 3577 Engineering Building, E. Lansing, MI 48824.E-mail: [email protected].
Terry Johnson
P.G.
Director, Groundwater Protection Program, Waste Management, Inc., Minneapolis, Minnesota
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.