Record Display for the EPA National Library Catalog

RECORD NUMBER: 36 OF 130

OLS Field Name OLS Field Data
Main Title CRSTER: EPA/ORD (Environmental Protection Agency/Office of Research and Development) Air Quality Simulation Model.
Author Mersch, J. ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC. Meteorology and Assessment Div.
Publisher 1 Aug 89
Year Published 1989
Report Number EPA/SW/DK-89/152;
Stock Number PB90-500323
Additional Subjects Models-Simulation ; Air pollution ; Atmospheric motion ; Algorithms ; Wind(Meteorology) ; Diskettes ; Air quality ; Stationary sources ; Stacks ; Gaussian plume models ; L=Fortran ; H=IBM 3090
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-500323 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/10/1990
Collation 1 diskette
Abstract
The algorithm estimates ground-level concentrations resulting from up to 19 colocated elevated stack emissions for an entire year and prints out the highest and second highest 1-, 3-, and 24-hour concentrations as well as the annual mean concentrations at a set of 180 receptors (5 distances by 36 azimuths). The algorithm is based on a modified form of the steady-state Gaussian plume equation which uses either Pasquill-Gifford or Briggs urban dispersion coefficients and includes adjustments for plume rise and limited mixing. Terrain adjustments are made as long as the surrounding terrain is physically lower than the lowest stack height input. Pollutant concentrations for each averaging time are computed for discrete, non-overlapping time periods (no running averages are computed) using measured hourly values of wind speed and direction, and estimated hourly values of atmospheric stability and mixing height. Software Description: The model is written in the FORTRAN programming language for implementation on an IBM 3090 computer. The software is distributed on a 5 1/4-inch IBM/PC-compatible diskette. Data is in compressed format but a dearchive utility is included.