Record Display for the EPA National Library Catalog
RECORD NUMBER: 149 OF 360Main Title | Evaluation of a Convective Scaling Parameterization for Estimating the Diffusion of a Buoyant Plume. | |||||||||||
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Author | Pierce, T. E. ; | |||||||||||
CORP Author | Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. | |||||||||||
Year Published | 1987 | |||||||||||
Report Number | EPA/600/D-87/158; | |||||||||||
Stock Number | PB87-191490 | |||||||||||
Additional Subjects | Plumes ; Connection ; Air pollution ; Mathematical models ; Diffusion ; Evaluation ; Scaling ; Boundary layer ; Wind velocity ; Wind direction ; Atmospheric temperature ; Solar radiation ; Heat flux ; Coal fired power plants | |||||||||||
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Collation | 15p | |||||||||||
Abstract | During limited-mixed convective conditions, high concentrations of air pollutants have been observed at ground-level from buoyant plumes. Routinely-applied Gaussian plume dispersion models have difficulty simulating diffusion for these conditions. However, advances in convective scaling offer some hope for improved model formulations. The paper evaluates the usefulness of a diffusion formula proposed by Briggs. Thirty-nine hours of extensive meteorological, source, and tracer data were analyzed from the Kincaid field study. The evaluation of the Briggs formula compared to a Gaussian plume dispersion model showed better model performance. |