Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title HEGADAS: Heavy Gas Dispersion Model (for Microcomputers).
Author Marsden, A. ; Guinnup, D. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Publisher 27 Jan 89
Year Published 1989
Report Number EPA/SW/DK-89/027;
Stock Number PB89-164552
Additional Subjects Models-Simulation ; Dispersions ; Gases ; Air pollution ; Heat transfer ; Evaporation ; Water vapor ; Diskettes ; L=Fortran ; H=IBM PC
Library Call Number Additional Info Location Last
NTIS  PB89-164552 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 08/24/1989
Collation 4 diskettes
The HEGADAS program models the dispersion of releases of heavier-than-air gases to the atmosphere. The model is an integral model which uses assumed profile (e.g., concentration profile) shapes and empirical relations describing air entrainment. The model provides for a smooth transition to passive dispersion. Descriptions of heat transfer from the ground and water vapor transfer are also included. The source release rate may be constant or time-dependent (e.g., evaporating liquid pool). Software Description: The software is written in the FORTRAN language for use on an IBM PC or compatible machines using DOS 3.1 or higher operating system. Memory requirement is 512K.