Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Experimental evaluation of two sharp front models for vadose zone non-aqueous phase liquid transport
Author Illangasekare, T. ; Znidarcic, D. ; Walser, G. ; Weaver, J.
Other Authors
Author Title of a Work
Illangasekare, Tissa H.
CORP Author Colorado Univ. at Boulder. Dept. of Civil, Environmental, and Architectural Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Robert S. Kerr Environmental Research Laboratory ;
Year Published 1995
Report Number EPA/600/R-94/197;CR-816807; EPA-R-816807
Stock Number PB95-178232
Subjects Zone of aeration--United States--Computer simulation ; Groundwater--United States--Computer simulation ; Soil pollution--United States--Computer simulation
Additional Subjects Water pollution monitoring ; Environmental transport ; Ground water ; Vadose water ; Computerized simulation ; Model studies ; Path of pollutants ; Soil water movement ; Multiphase flow ; Subsurface flow ; Hydraulic properties ; Capillary pressure ; Rainfall ; Porous media ; Hydrocarbons ; Experimental design ; Nonaqueous phase liquids
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB95-178232 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 197 p. : ill. ; 28 cm.
Laboratory experiments have been conducted to test two such models developed by the authors. Fundamental transport parameters for the media were determined using a flow-pump system. One-dimensional spill simulations of a non-aqueous phase liquid were conducted in vertical soil columns. One of the models, which is similar to concept to the Green-Ampt type infiltration models, assumes sharp leading and trailing fronts. It deviates from the experimental results for long modeling times. The second model based on kinematic wave formulation and the method of characteristics approximates the gradual decline in saturation behind the front and simulates the spill behavior well. Based on these experimental evaluations, the suitability and limitations of these simple models are determined.
"November 1994." "EPA/600/R-94/197." "CR-816807." Includes bibliographical references (p. 88-91).