Record Display for the EPA National Library Catalog


Main Title CDM 2.0 : climatological dispersion model, user's guide /
Author Irwin, John S. (John Shearer, ; Chico, T. ; Catalano, J.
Other Authors
Author Title of a Work
Chico, Thomas.
Catalano, Joseph A.
CORP Author Aerocomp, Inc., Costa Mesa, CA.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.
Publisher U.S. Environmental Protection Agency, Atmospheric Sciences Research Laboratory,
Year Published 1985
Report Number EPA 600/8-85/029; EPA-68-02-3750
Stock Number PB86-136 546 National Technical Information Service
OCLC Number 39983565
Subjects Air--Pollution--Mathematical models ; Atmospheric diffusion--Mathematical models
Additional Subjects Air pollution ; Forecasting ; Plumes ; Sources ; Concentration(Composition) ; Wind(Meteorology) ; Transport properties ; Sites ; Mathematical models ; Climatological dispersion model ; Atmospheric dispersion ; User manuals(Computer programs) ; Air pollution sampling ; Point areas ; Gaussian plume models
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA 600-8-85-029 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD ARCHIVE EPA 600-8-85-029 AWBERC Library/Cincinnati,OH 10/15/2021
ESAD  EPA 600-8-85-029 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB86-136546 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xiii, [137] pages : illustrations ; 28 cm
CDM-2.0 (Climatological Dispersion Model - Version 2.0) determines longterm (seasonal or annual) quasi-stable pollutant concentrations in rural or urban settings using average emission rates from point and area sources and a joint frequency distribution of wind direction, wind speed, and stability. The Gaussian plume hypothesis forms the basis for the calculations. Contributions are calculated assuming the narrow plume hypothesis, Calder (1971, 1977), and involve an upwind integration over the area sources. Computations can be made for up to 200 point sources and 2500 area sources at an unlimited number of receptor locations. The number of point and area sources can be easily modified within the code. CDM-2.0 is an enhanced version of CDM including the following options: 16 or 36 wind-direction sectors, initial plume dispersion, buoyancy-induced dispersion, stack-tip downwash, and gradual (transitional) plume rise. The user has a choice of seven dispersion parameter schemes. Optional output includes point and area concentration roses and histograms of pollutant concentration by stability class.
"EPA/600/8-85-029." Cover title. EPA contract no. 68-02-3750; EPA project officer: D. Bruce Turner. "NTIS PB86-136546." Includes bibliographical references (pages 94-97).