Main Title |
Stack Heights and Locations in Complex Terrain. |
Author |
Lawson, R. E. ;
Snyder, W. H. ;
|
CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. |
Year Published |
1985 |
Report Number |
EPA/600/D-85/200; |
Stock Number |
PB86-102324 |
Additional Subjects |
Chimneys ;
Terrain models ;
Air pollution ;
Experimental design ;
Concentration(Composition) ;
Boundary layers ;
Mathematical models ;
Wind tunnel ;
Sources ;
Electric power plants ;
Combustion products ;
Industrial wastes ;
Plumes ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB86-102324 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
8p |
Abstract |
Terrain amplification factors were measured for a variety of source positions (locations and heights) both upstream and downstream of two model hills, an axisymmetric hill and a two-dimensional ridge. The spatial variation of these terrain amplification factors was used to delineate the vertical and longitudinal extent of the areas where excess concentrations (terrain amplification factors greater than 1.0) occurred. For the axisymmetric hill, a region of 40% excess concentration was found to extend a maximum of 1.8 hill heights in the vertical, 14 hill heights upstream, and 10 hill heights downstream. For the two-dimensional ridge, this region of 40% excess concentration extended 2.2 hill heights in the vertical, 8 hill heights upstream, and 15 hill heights downstream. Maximum terrain amplification factors for both the axisymmetric hill and the two-dimensional ridge were found on the downstream side of the hills and had values of approximately 5.6 and 6.8 respectively. |
PUB Date Free Form |
Sep 85 |
Category Codes |
13B; 68A; 97R |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/09 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
535325058 |
Origin |
NTIS |
Type |
CAT |