Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title DEGADIS (DEnse GAs DISpersion) Model, Version 2.1 (for Microcomputers).
Author Guinnup, D. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Publisher 1989
Year Published 1989
Report Number EPA/SW/DK-90/034;
Stock Number PB90-502253
Additional Subjects Model-simulation ; Air pollution ; Dispersions ; Plumes ; Gases ; Mathematical models ; Dilution ; Trajectories ; Diskettes ; Chemical effluents ; L=Fortran ; H=DEC VAX
Library Call Number Additional Info Location Last
NTIS  PB90-502253 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 08/27/1990
Collation 1 diskette
An improved Jet-Plume model has been interfaced with DEGADIS to provide for prediction of the trajectory and dilution of elevated dense gas jets to ground contact. DEGADIS predicts the ensuing ground-level plume dispersion. The Jet-Plume model provides for: automatic adjustment of integration step-size (using the Runge-Kutta-Gill method as in DEGADIS): elliptical plume shape (cross-section), with the Pasquill-Gifford plume dispersion coefficient representation of atmospheric turbulent entrainment; user specification of averaging time; ground reflection when the plume (lower) boundary reaches ground level; and application to scenarios where the plume remains aloft. The model should be uploaded via modem from a PC terminal to host a VAX computer, and several files must then be renamed prior to compilation and execution. The program is written in FORTRAN for compilation and execution on a DEC VAX Computer.