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RECORD NUMBER: 47 OF 82

OLS Field Name OLS Field Data
Main Title Modeling Three-Dimensional Subsurface Flow, Fate and Transport of Microbes and Chemicals (3DFATMIC).
Author Cheng, J. R. ; Yeh, G. T. ; Short, T. E. ;
CORP Author Pennsylvania State Univ., University Park. Dept. of Civil and Environmental Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1994
Year Published 1994
Report Number EPA-R-818322; EPA/600/A-94/231;
Stock Number PB95-138210
Additional Subjects Ground water ; Mathematical models ; Biodegradation ; Simulation ; Transport theory ; Concentration(Composition) ; Fluid flow ; Chemical reactions ; Microorganisms ; Growth ; Numerical analysis ; Reprints ; Chemical transformation
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB95-138210 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 03/06/1995
Collation 10p
Abstract
A three-dimensional model simulating the subsurface flow, microbial growth and degradation, microbial-chemical reaction, and transport of microbes and chemicals has been developed. The model is designed to solve the coupled flow and transport equations. Basically, the saturated-unsaturated flow field is described by the well-known Richards' equation with variant hydraulic conductivity changing with microbial and chemical concentrations. Seven components, namely one substrate, two electron acceptors, one nutrient, and three types of microbes, might exist in subsurface systems and compose seven simultaneous advective-dispersive-reactive transport equations. Since numerical problems may be introduced by using the conventional finite element method, the modified Lagrangian-Eulerian numerical scheme with adapted zooming and peak capturing is applied to solving these seven nonlinear partial differential equations accurately.