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Main Title Screening Model for Nonaqueous Phase Liquid Transport in the Vadose Zone Using Green-Ampt and Kinematic Wave Theory.
Author Weaver, J. W. ; Charbeneau, R. J. ; Lien, B. K. ;
CORP Author Robert S. Kerr Environmental Research Lab., Ada, OK. ;Texas Univ. at Austin. Environmental and Water Resources Engineering Group.
Publisher cJan 94
Year Published 1994
Report Number EPA/600/J-94/086;
Stock Number PB94-146255
Additional Subjects Vadose water ; Kinematics ; Mathematical models ; Multiphase flow ; Soil water movement ; Ground water ; Water pollution control ; Soil pollution ; Kinematic equations ; Subsurface flow ; Oils ; Liquid phases ; Reprints ; NAPL(Nonaqueous Phase Liquid)
Library Call Number Additional Info Location Last
NTIS  PB94-146255 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 14p
In the paper, a screening model for flow a nonaqueous phase liquid (NAPL) and associated chemical transport in the vadose zone is developed. The model is based on kinematic approximation of the governing equations for both the NAPL and a partitionable chemical constituent. The resulting governing equation is a first-order, quasi-linear hyperbolic equation to which the generalized method of characteristics can be applied. The approach generally neglects the contribution to the NAPL flux from capillary pressure gradients. During infiltration under ponded conditions, or when the NAPL flux exceeds the maximum effective conductivity of the soil, the effect of capillary suction is included in the model through the usage of the Green-Ampt model. (Copyright (c) 1994 by the American Geophysical Union.)