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VERTICAL DISPERSION FROM SURFACE AND ELEVATED RELEASES: AN INVESTIGATION OF A NON-GAUSSIAN PLUME MODEL
Citation:
Brown, M., S. Arya, AND W. Synder. VERTICAL DISPERSION FROM SURFACE AND ELEVATED RELEASES: AN INVESTIGATION OF A NON-GAUSSIAN PLUME MODEL. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-93/267 (NTIS PB93212736), 1993.
Description:
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. everal 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 (a) in the exponential vertical concentration profile for a surface release {C (z) exp [-z a]} was smaller than the experimentally measured exponent. odel closure assumptions and experimental shortcomings were examined in order to account for the differences.
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VERTICAL DISPERSION FROM SURFACE AND ELEVATED RELEASES: AN INVESTIGATION OF A NON-GAUSSIAN PLUME MODEL