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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
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
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
Abstract 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.
Availability Notes The software is contained on 5 1/4-inch diskettes, double density (360K), compatible with the IBM PC microcomputer. The diskettes are in the ASCII format. Price includes documentation, PB89-164560.
NTIS Title Notes Model-Simulation.
Category Codes 68A#; 91A; 43F; 62
NTIS Prices CP D99
Primary Description 200/04
Document Type NT
Cataloging Source NTIS/MT
Control Number 914521379
Origin NTIS
Type CAT