| Main Title |
User's Manual for the APRAC-1A Urban Diffusion Model Computer Program. |
| Author |
Mancus, R. L. ;
Ludwi, F. L. ;
|
| CORP Author |
Stanford Research Inst., Menlo Park, Calif. |
| Year Published |
1972 |
| Report Number |
CAPA-3-68(1-69)-CRC; APRAC-CAPA-3-68 ;SRI-8563; 3-4; |
| Stock Number |
PB-213 091 |
| Additional Subjects |
( Urban areas ;
Air pollution) ;
( Air pollution ;
Atmospheric motion) ;
( Highway transportation ;
Air pollution) ;
( Computer programs ;
Programming manuals) ;
Handbooks ;
Atmospheric diffusion ;
Mathematical models ;
Wind(Meteorology) ;
Exhaust gases ;
Carbon monoxide ;
Streets ;
Concentration(Composition) ;
FORTRAN ;
Automobile exhaust ;
CDC 6400 computers ;
APRAC 1A computer program ;
IBM 360/50 computers ;
Computerized simulation
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-213 091 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
122p |
| Abstract |
The APRAC-1A diffusion model was developed as a versatile and practical model for computing the concentrations of pollutants at any point within a city. The model calculates pollutant contributions from diffusion on various scales, including: extraurban diffusion, mainly from sources in upwind cities; intraurban diffusion from freeway, arterial, and feeder street sources; local diffusion of emissions within a street canyon. The model treats only carbon monoxide (CO), a relatively inert gas in the atmosphere but an important pollutant in terms of health. Motor vehicles are the major source of this gas. (Author) |
| Supplementary Notes |
Sponsored in part by Environmental Protection Agency. |
| Highlights Notes |
Describes a versatile and practical model for computing the concentrations of pollutants at any point within a city. |
| PUB Date Free Form |
Sep 72, |
| Category Codes |
13B; 4A; 9B; 68A; 55B; 62A |
| NTIS Prices |
PC A06/MF A01 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
326533782 |
| Origin |
NTIS |
| Type |
CAT |
