Main Title |
Evaluation of Selected Air Pollution Dispersion Models Applicable to Complex Terrain. |
Author |
Lantz, Ronald B. ;
Settari, Antonin ;
Hoffnable., Gale F. ;
|
CORP Author |
Intercomp, Houston, Tex.;Environmental Protection Agency, Research Triangle Park, N.C. Office of Air Quality Planning and Standards. |
Year Published |
1974 |
Report Number |
EPA-68-02-1085; EPA/450/3-75-059; |
Stock Number |
PB-246 640 |
Additional Subjects |
Air pollution ;
Atmospheric diffusion ;
Mathematical models ;
Mathematical prediction ;
Turbulent flow ;
Viscosity ;
Numerical analysis ;
Concentration(Composition) ;
Wind velocity ;
Wind direction ;
Texas ;
Utah ;
Huntington Canyon ;
Navier-Stokes equations ;
Terrain models ;
El Paso(Texas)
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-246 640 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
108p |
Abstract |
A comparison has been made of three models which attempt to predict the dispersion of pollutants in situations with complex terrain. The three models are (1) a Gaussian calculation with terrain assumptions known as the NOAA model, (2) an EPA model, C4M3D also known as the 'valley' model, which substitutes different terrain assumptions in the Gaussian calculations, and (3) the INTERCOMP combined wind flow and plume dispersion model which uses a numerical calculational method. Predictions made by each of these models are compared to measurements of ambient concentration data taken in Huntington Canyon, Utah and at El Paso, Texas. The results indicate that the INTERCOMP model has a predictive accuracy for terrain situations comparable to that normally expected for Gaussian predictions in flat terrain, i.e. a factor of two to three. For stable atmospheres, however, the Gaussian predictions of the NOAA model averaged a factor of fifteen higher than the measured results. |
NTIS Title Notes |
Final rept.. |
PUB Date Free Form |
18 Sep 74 |
Category Codes |
13B; 04A; 68A; 55B |
NTIS Prices |
PC A06/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326611180 |
Origin |
NTIS |
Type |
CAT |