Record Display for the EPA National Library Catalog

RECORD NUMBER: 4277 OF 4735

OLS Field Name OLS Field Data
Main Title The RETC code for quantifying the hydraulic functions of unsaturated soils /
Author Van Genuchten, M. Th. ; Leij, F. J. ; Yates, S. R.
Other Authors
Author Title of a Work
Leij, F. J.
Yates, S. R.
CORP Author Agricultural Research Service, Riverside, CA. Salinity Lab.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1992
Report Number EPA/600/2-91/065; DW12933934
Stock Number PB92-119668
OCLC Number 25645186
Subjects Soil moisture--Mathematical models. ; Soil permeability--Mathematical models. ; Zone of aeration.
Additional Subjects Hydraulic conductivity ; Vadose water ; Soil water ; Soil properties ; Computerized simulation ; Documentation ; Retention ; Unsaturated flow ; Environmental transport ; Path of pollutants ; Land pollution ; Chemical compounds ; Water management
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=30000I52.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EHAM  S594V36x, 1992 Region 1 Library/Boston,MA 04/29/2016
EJAD  EPA 600/2-91-065 Region 3 Library/Philadelphia, PA 05/29/2012
EJBD ARCHIVE EPA 600-2-91-065 Headquarters Library/Washington,DC 11/11/2011
EJBD  EPA 600/2-91/065 c.1-2 Headquarters Library/Washington,DC 04/17/1992
EKAM  S594 V36x, 1992 Region 4 Library/Atlanta,GA 04/01/1994
EMBD  EPA/600/2-91/065 GWERD Library/Ada,OK 06/26/1992
ERAD  EPA 600/2-91-065 Region 9 Library/San Francisco,CA 05/01/1992
ESAD  EPA 600-2-91-065 Region 10 Library/Seattle,WA 03/23/2010
Collation x, 85 pages : illustrations ; 28 cm
Abstract
The EPA uses numerous mathematical models to predict and analyze the movement of water and dissolved contaminants in the saturated and unsaturated zones of the subsurface environment. The usefulness of these models, and the accuracy with which model predictions can be made, depends greatly on the ability to reliably characterize the hydraulic properties of the unsaturated zone. The report discusses several theoretical models which may be used to quantify the unsaturated soil hydraulic properties involving the soil water retention and hydraulic conductivity functions. The report includes a computer program which predicts, among other things, the unsaturated hydraulic conductivity from independently measured soil water retention data. Several examples illustrate the applicability of the model to different types of hydraulic data. The information in the report should be of interest to all those concerned with the development of improved methods for predicting or managing water and contaminant transport in partly saturated soils.
Notes
Research report. "U.S. Salinity Laboratory, U.S. Department of Agriculture." Shipping list no.: 92-168-P. "December 1991." "EPA/600/2-91/065." Includes bibliographical references (pages 52-55).