Simulation of the Dispersion of Pollutants Using Two Approaches for the Case of a Low Source in the SBL: Evaluation of Turbulence Parameterizations

• Published in: Water, air, and soil pollution Vol. 161; no. 1; p. 285
• Main Authors: Moreira, D M, Carvalho, J C, Goulart, A G, Tirabassi, T
• Format: Journal Article
• Language: English
• Published: 01.02.2005
• ISSN: 0049-6979

Two turbulence parameterizations were evaluated in the case of a low source in the stable boundary layer (SBL), to be applied in the Eulerian and the Lagrangian approaches. Each of the models is described, as are the two turbulence parameterization schemes suggested by Degrazia et al. and by Hanna, respectively. The first parameterizations were derived for wind velocity variances, decorrelation time scales, and diffusion coefficients, and the second parameterization described the turbulence field from surface layer and boundary layer parameters. The performances of the models were evaluated against experimental concentrations using tracer sulfur dioxide from the Prairie Grass dispersion experiments conducted in Nebraska. Results showed that both models, with the proposed turbulence parameterizations, produced a good fit of the measured ground-level cross-wind concentrations.