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RECORD NUMBER: 20 OF 23

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 1991
Report Number EPA-600/2-91/065; EPA/SW/DK-92/038A
Stock Number PB92-119668
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
NTIS  PB92-119668 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
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
"U.S. Salinity Laboratory, U.S. Department of Agriculture."--Page 85. "December 1991." "EPA/600/2-91/065." "PB92-119668." "IAG-DW12933934." "EP 1.23/2:600/2-91/065." Includes bibliographical references (pages 52-55). Contract Number: DW12933934. Microfiche.