| Main Title |
Vertical Dispersion from Surface and Elevated Releases: An Investigation of a Non-Gaussian Plume Model. |
| Author |
Brown, M. J. ;
Arya, S. P. ;
Snyder, W. H. ;
|
| CORP Author |
North Carolina State Univ. at Raleigh. Dept. of Marine, Earth and Atmospheric Sciences.;National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Atmospheric Sciences Modeling Div.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. |
| Publisher |
c1993 |
| Year Published |
1993 |
| Report Number |
EPA/600/J-93/267; |
| Stock Number |
PB93-212736 |
| Additional Subjects |
Boundary layer flow ;
Pollution transport ;
Vertical motion ;
Dispersing ;
Plumes ;
Mathematical models ;
Atmospheric circulation ;
Air pollution ;
Turbulent diffusion ;
Wind tunnels ;
Rural areas ;
Non-Gaussian plume model
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB93-212736 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
18p |
| Abstract |
The vertical diffusion of a passive tracer released from surface and elevated sources in a neutrally-stratified boundary layer has been studied by comparing field and laboratory experiments with a non-Gaussian K-theory model that assumes power-law profiles for the mean velocity and vertical eddy diffusivity. Several important differences between model predictions and experimental data were discovered: (1) the model overestimated ground-level concentrations from surface and elevated releases at distances beyond the peak concentrations; (2) the model overpredicted vertical mixing near elevated sources, especially in the upward direction; (3) the model-predicted exponent in the exponential vertical concentration profile for a surface release was smaller than the experimentally measured exponent. Model closure assumptions and experimental shortcomings were examined in order to account for the differences. |
