Record Display for the EPA National Library Catalog


Main Title Valley Model user's guide /
Author Burt, Edward W.
CORP Author Environmental Protection Agency, Research Triangle Park, N.C. Office of Air Quality Planning and Standards.
Publisher Environmental Protection Agency, Office of Air and Waste Management, Office of Air Quality Planning and Standards, Monitoring and Data Analysis Division, Source Receptor Analysis Branch ; For sale by the National Technical Information Service,
Year Published 1977
Report Number EPA-450/2-77-018
Stock Number PB-274 054
OCLC Number 03808295
ISBN pbk.
Subjects Air--Pollution--United States--Mathematical models ; Air--Pollution--United States--Computer programs ; Air--Pollution--Computer programs ; Air--Pollution--Mathematical models
Additional Subjects Mathematical models ; Air pollution ; Numerical analysis ; Concentration(Composition) ; Wind velocity ; Wind speed ; Plumes ; Computer programs ; Atmospheric diffusion ; Dispersion ; Fortran ; Gaussian plume models ; Valley computer program ; UNIVAC-1110 computers ; Point sources ; Valley model
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA-450/2-77-018 Research Triangle Park Library/RTP, NC 08/13/1999
ELBD ARCHIVE EPA 450-2-77-018 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ERAD  EPA 450/2-77-018 Region 9 Library/San Francisco,CA 01/23/2013
ESAD  EPA 450-2-77-018 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-274 054 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 110 pages in various pagings : diagrams ; 27 cm.
The Valley Model is a steady-state, univariate Gaussian plume dispersion model designed for multiple point- and area-source applications. It calculates pollutant concentrations for each frequency designated in an array defined by six stabilities, 16 wind directions, and six wind speeds for 112 program-designated receptor sites on a radial grid of variable scale. The output concentrations are appropriate for either a 24-hour or annual period, as designated by the user. The model contains the concentration equations, the Pasquill-Gifford vertical dispersion coefficients and the Pasquill stability classes, as given by Turner. Plume rise is calculated according to Briggs. Plume height is adjusted according to terrain elevation for stable cases. Technical details of the program are presented, with descriptions of data requirements. Flow diagrams and input data forms are presented. Four appendices include a complete test-case analysis, a complete program listing and a paper in which estimated and observed data are compared at several sites for 24-hour periods during which the upper limits of concentrations were observed.
Issued Sept. 1977. Includes appendices. Includes bibliographical references (pages 5-1).