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Main Title 3DHYDROGEOCHEM : a 3-dimensional model of density-dependent subsurface flow and thermal multispecies-multicomponent HYDROGEOCHEMical transport /
Author Yeh, Gour-Tsyh (George) ; Yeh, G. T. ; Cheng, H. P.
Other Authors
Author Title of a Work
Short, Thomas E.
CORP Author Pennsylvania State Univ., University Park. Dept. of Civil and Environmental Engineering.;National Risk Management Research Lab., Ada, OK. Subsurface Protection and Remediation Div.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory,
Year Published 1999
Report Number EPA 600-SR-98-159; EPA 600-R-98-159; EPA-CR-818322
Stock Number PB99-150419
OCLC Number 42192152
Subjects Multiphase flow--Mathematical models ; Thermal analysis in earth sciences ; Hydrogeology--Mathematical models
Additional Subjects Three-dimensional flow ; Path of pollutants ; Aqueous solutions ; Computerized simulation ; Subsurface flow ; Environmental transport ; Temperature effects ; Chemical compound ; Heat transfer ; Chemical equilibrium ; Boundary conditions ; Three-dimensional models ; Water pollution monitoring ; Steady state ; Finite element analysis ; Hydrologic models ; Mathematical models ; 3DHYDROGEOCHEM computer model ; HYDROGEOCHEM computer model ; Transient state
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-R-98-159 Headquarters Library/Washington,DC 02/28/2019
ELBD ARCHIVE EPA 600-R-98-159 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
EMBD  EPA/600/R-98/159 NRMRL/GWERD Library/Ada,OK 08/27/1999
NTIS  PB99-150419 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation x, 150 pages : illustrations ; 28 cm
This report presents a three-dimensional finite-element numerical model designed to simulate chemical transport in subsurface systems with temperature effect taken into account. The three-dimensional model is developed to provide (1) a tool of application, with which one is able to deal with a variety of real-world problems, (2) a tool of education, with which one can study how a factor would affect the whole system, and (3) a substructure, which one could modify to handle specific problems. The hydrological environment to which the model can be applied is a heterogeneous, anisotropic, saturated-unsaturated subsurface medium under either transient-state or steady-state flow conditions. In addition, the temperature within the system of interest can be for both time- and location-dependent. The model employs chemical equilibrium to describe the relationship among chemicals. The chemical reactions included in the model are aqueous complexation, multi-site adsorption/desorption, multi-site ion-exchange, precipitation/dissolution, redox, and acid-base reactions. To extend its applicability to more real-world problems, two approaches are presented for the chemical transport module in this report. The first approach uses the pore velocity and dispersion coefficient to handle advection and dispersion, respectively, for aqueous components, whereas the second approach employs the retarded pore velocity and the retarded dispersion coefficient. The governing equations of subsurface flow, chemical transport, chemical equilibrium, and heat transfer are stated and/or derived. The governing equations of subsurface flow, chemical transport, chemical equilibrium, and heat transfer are stated and/or derived. The numerical approaches with the finite element method to solve the governing equations are described. Four application examples, including a three-dimensional subsurface flow example, a three-dimensional reactive chemical transport example, a three-dimensional heat transfer example, and a three-dimensional coupled flow-transport-transfer example, are presented to demonstrate the capability of the model. Data input guide and program description are stated in Appendix A and Appendix B, respectively. in Appendix C, parameter specification for array dimensions in 3DHYDROGEOCHEM is given.
"EPA 600-R-98-159." "July 1999." Cover title. Project Officer, Thomas E. Short, Subsurface Protection and Remediation Division, National Risk Management Research Lab, Ada, OK. Includes bibliographical references (pages 149-150).