Screening model for nonaqueous phase liquid transport in the vadose zone using Green-Ampt and kinematic wave theory
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.)
- Research Organization:
- Environmental Protection Agency, Ada, OK (United States). Robert S. Kerr Environmental Research Lab.
- OSTI ID:
- 5081987
- Report Number(s):
- PB-94-146255/XAB; EPA-600/J-94/086
- Resource Relation:
- Other Information: Pub. in Water Resources Research, Vol. 30, No. 1, 93-105 (Jan 1994)
- Country of Publication:
- United States
- Language:
- English
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