| Main Title |
APRAC-2 Air Pollution Dispersion Model. |
| Author |
Ludwig, Frank ;
Obinata., Shun ;
|
| CORP Author |
Environmental Protection Agency, San Francisco, Calif. Air and Hazardous Materials Div. |
| Year Published |
1977 |
| Report Number |
EPA/DF-78/007; |
| Stock Number |
PB-283 263 |
| Additional Subjects |
Software ;
Air pollution ;
Computer programs ;
Fortran ;
Atmospheric diffusion ;
Computerized simulation ;
Carbon monoxide ;
Emission ;
Magnetic tapes ;
APRAC-2 model ;
Gaussian plume models ;
DATA-100 computers
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-283 263 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
mag tape |
| Abstract |
The computer program for a completely revised version of the APRAC-1A diffusion model is presented and discussed. The new code uses EPA's emissions calculation methodology from Supplement No. 5 to AP-42. Gridded, and link by link emissions can be output for hydrocarbons, carbon monoxide or oxides of nitrogen. Diffusion calculations make use of a receptor-oriented Gaussian plume model. Local winds at the receptor can be used; they are interpolated from multiple wind inputs. Mixing heights may be calculated from sounding data, or input directly. Two local source models are available, one treating pollutant behavior in a street canyon, the other treats vehicle and pollutant effects at a signalized intersection. A small program is included for decoding Federal Highway Administration data tapes...Software Description: The program is written in the Fortran programming language for implementation on a DATA 100/78 computer. 300K bytes of core storage are required to operate the model. |
| Availability Notes |
Source tape is in EBCDIC character set. Tapes can be prepared in most standard 7 or 9 track recording modes for one-half inch tape. Identify recording mode desired by specifying character set, track, density, and parity. Call NTIS Computer Products if you have questions. Price includes documentation, PB-275 459. |
| NTIS Title Notes |
Software. |
| PUB Date Free Form |
Jun 77 |
| Category Codes |
13B; 9B; 68A#; 62B |
| NTIS Prices |
CP T03 |
| Primary Description |
909/00 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
323744347 |
| Origin |
NTIS |
| Type |
CAT |
