Main Title |
Urban Air Shed Photochemical Simulation Model Study. Volume I. Development and Evaluation. Appendix C. Microscale Model of Local Vehicular Source Contributions to Measured Pollutant Concentrations. |
Author |
Lui, Mei-Kao ;
Roth., P. M. ;
|
CORP Author |
Systems Applications, Inc., Beverly Hills, Calif.;Environmental Protection Agency, Washington, D.C. Office of Research and Development. |
Year Published |
1973 |
Report Number |
EPA-68-02-0339; EPA-R4-73-030d; |
Stock Number |
PB-234 976 |
Additional Subjects |
Atmospheric diffusion ;
Air pollution ;
Carbon monoxide ;
Atmospheric models ;
Verifying ;
Mathematical models ;
Buildings ;
Exhaust gases ;
Urban areas ;
Computerized simulation ;
Atmospheric motion ;
Los Angeles Basin ;
Atmospheric circulation ;
Performance evaluation ;
Streets ;
Automobile exhaust
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-234 976 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
49p |
Abstract |
To establish a basis for validation of an urban airshed model based on a macroscale grid, a sub-grid, or microscale, model was undertaken capable of predicting the elevation in concentration at the monitoring station, above background levels, that is contributed by local automotive emissions. The development and validation of a simple diffusion model for CO to investigate the feasibility of modeling at two spatial scales is described. Limited results are reported for four LA County stations. Previous efforts in measuring and predicting local variations in concentrations due to nearby sources were reviewed. A general description of the model is given, details of its formulation for application in the vicinity of low structures (one to two story buildings) are discussed and graphs are presented which display the relationship between the magnitude of concentration elevation and the distance of the sampling probe from the street, the speed and direction of the local wind, and the magnitude of the local turbulent eddy diffusivity. |
Supplementary Notes |
See also PB-234 975 and PB-234 977. |
PUB Date Free Form |
Jul 73 |
Category Codes |
13B; 4A; 4B; 68A |
NTIS Prices |
PC A03/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326593271 |
Origin |
NTIS |
Type |
CAT |