| Main Title |
VALLEY. 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-89/163; |
| Stock Number |
PB90-500349 |
| Additional Subjects |
Models-Simulation ;
Air pollution ;
Atmospheric motion ;
Algorithms ;
Wind(Meteorology) ;
Plumes ;
Dispersions ;
Diskettes ;
Air quality ;
Point sources ;
Gaussian plume models ;
L=Fortran ;
H=IBM 3090
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB90-500349 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
1 diskette |
| Abstract |
The VALLEY algorithm is a steady-state, univariate Gaussian plume dispersion algorithm designed for estimating either 24-hour or annual concentrations resulting from emissions from up to 50 (total) point and area sources. Calculations of ground-level pollutant concentrations are made for each frequency designated in an array defined by six stabilities, 16 wind directions, and six wind speeds for 112 program-designed receptor sites on a radial grid of variable scale. Empirical dispersion coefficients are used and include adjustments for plume rise and limited mixing. Plume height is adjusted according to terrain elevations and stability classes. Software Description: The software is written in the FORTRAN programming language for implementation on an IBM model 3090 computer. The model is distributed on a 5 1/4-inch IBM/PC-compatible diskette. Data is in compressed format but a dearchive utility is included. |
| Availability Notes |
The model is contained on 5 1/4-inch, double density (360K) diskettes, compatible with the IBM PC microcomputer, ready for uploading to an IBM 3090 computer. Price includes documentation, PB-274 054. |
| NTIS Title Notes |
Model-Simulation. |
| Category Codes |
68A#; 91A; 43F; 62 |
| NTIS Prices |
CP D01 |
| Primary Description |
600/09 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
936222007 |
| Origin |
NTIS |
| Type |
CAT |
