Record Display for the EPA National Library Catalog


Main Title CHEMFLO : one-dimensional water and chemical movement in unsaturated soils /
Author Nofziger, D. L. ; Rajender, K. ; Nayudu, S. K.
Other Authors
Author Title of a Work
Williams, J. R.
CORP Author Oklahoma State Univ., Stillwater. Dept. of Agronomy.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher U.S. Environmental Protection Agency,
Year Published 1989
Report Number EPA/600/8-89/076; EPA-R-812808
Stock Number PB90-126020
OCLC Number 20771284
Subjects Water--Movements
Additional Subjects Unsaturation ; Soil properties ; One dimensional flow ; Decision making ; Environmental transport ; Mathematical models ; Convection ; Dispersing ; Graphs(Charts) ; Manuals ; Boundaries ; Chemicals
Internet Access
Description Access URL
Local Library Info
Library Local Subject Local Note
EKB EKB copy contains errata sheet stapled to inside back cover.
Library Call Number Additional Info Location Last
EHAM  S592.5.C4 1989 Region 1 Library/Boston,MA 04/29/2016
EJED  EPA 600/8-89-076 OCSPP Chemical Library/Washington,DC 04/06/1990
EKBD  EPA-600/8-89-076 Research Triangle Park Library/RTP, NC 04/23/2004
ELBD ARCHIVE EPA 600-8-89-076 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD ARCHIVE EPA 600-8-89-076 AWBERC Library/Cincinnati,OH 03/29/2023
EMBD  EPA/600/8-89/076 NRMRL/GWERD Library/Ada,OK 02/17/1995
ESAD  EPA 600-8-89-076 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB90-126020 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation v, 106 pages
An interactive software system was developed to enable decision-makers, regulators, policy-makers, scientists, consultants, and students to simulate the movement of water and chemicals in unsaturated soils. Water movement is modeled using Richards (1931) equation. Chemical transport is modeled by means of the convection-dispersion equation. These equations are solved numerically for one-dimensional flow and transport using finite differences. Results of the water model can be displayed in the form of graphs of water content, matric potential, driving force, conductivity, and flux density of water versus distance or time. Graphs of concentration, and flux density of chemical as functions of distance or time can also be displayed.
"EPA/600/8-89/076." "August 1989." "Project Officer J.R. Williams." "Office of Research and Development." "Robert S. Kerr Environmental Research Laboratory." Includes bibliographical references (page 104).