Record Display for the EPA National Library Catalog

RECORD NUMBER: 9 OF 4826

OLS Field Name OLS Field Data
Main Title 3DFEMWATER/3DLEWASTE : numerical codes for delineating wellhead protection areas in agricultural regions based on the assimilative capacity criterion /
Author Yeh, G. T. ; Sharp-Hansen, S. ; Lester, B. ; Strobl, R. ; Scarbrough, J.
Other Authors
Author Title of a Work
Yeh, G. T.
CORP Author AQUA TERRA Consultants, Mountain View, CA. ;Pennsylvania State Univ., University Park. ;GeoTrans, Inc., Sterling, VA. ;AScI Corp., Athens, GA.;Environmental Research Lab., Athens, GA.
Publisher Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1992
Report Number EPA 600-R-92-223; EPA-68-CO-0019
Stock Number PB93-217669
OCLC Number 29505747
Subjects Wellheads--Protection--Mathematical models. ; Groundwater--Pollution--Mathematical models. ; Water, Underground--Pollution--Mathematical models
Additional Subjects Wellheads ; Three dimensional flow ; Water pollution control ; Water wells ; Path of pollutants ; Ground water ; Agricultural chemicals ; Agricultural wastes ; Water supply ; Computerized simulation ; Air water interfaces ; Sediment water interfaces ; Saturated flow ; Unsaturated flow ; 3DFEMWATER computer model ; 3DLEWASTE computer model
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=30002PK3.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD  EPA/600-R-92-223 Headquarters Library/Washington,DC 04/28/1995
ELBD  EPA 600-R-92-223 AWBERC Library/Cincinnati,OH 04/10/1998
EMBD  EPA/600/R-92/223 GWERD Library/Ada,OK 02/03/1995
NTIS  PB93-217669 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 xi, 240 pages : illustrations ; 28 cm
Abstract
Two related numerical codes, 3DFEMWATER and 3DLEWASTE, are presented that can be used to delineate wellhead protection areas in agricultural regions using the assimilative capacity criterion. 3DFEMWATER (Three-dimensional Finite Element Model of Water Flow Through Saturated-Unsaturated Media) simulates subsurface flows, whereas 3DLEWASTE (Hybrid Three-dimensional Lagrangian-Eulerian Finite Element Model of Waste Transport Through Saturated-Unsatured Media) models contaminant transport. Both codes treat heterogeneous and anisotropic media consisting of as many geologic formations as desired, consider both distributed and point sources/sinks that are spatially and temporally dependent, and accept for types of boundary conditions--i.e., Dirichlet (fixed-head or concentration), specified-flux, Neumann (specified-pressure-head gradient or specified-dispersive flux), and variable. The variable boundary condition in 3DFEMWATER simulates evaporation/infiltration/seepage at the soil-air interface and, in 3DLEWASTE, simulates mass infiltration into or advection out of the system. 3DLEWASTE contains options to model adsorption using a linear, Fruendlich, or Langmuir isothern, plus dispersion, and first-order decay.
Notes
"EPA/600/R-92/223" "November 1992" PB93-217669 Includes bibliographical references (p. 150-152).