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Modelo euleriano semi-analítico para a dispersão de contaminantes na Camada Limite Planetária

2000; UNIVERSIDADE FEDERAL DE SANTA MARIA; Linguagem: Inglês

10.5902/2179460x36905

2179-460X

Davidson Martins Moreira, Ângela Beatrice Dewes Moura, Marco Túllio Vilhena, Gervásio Annes Degrazia,

Air Quality and Health Impacts

An analytical air quality dispersion model based on a discretization of the planetary boundary layer in N sub-layers is presented. In each sub-layer the diffusion-advection equation is solved by the Laplace Transform techniques, considering an average value for the vertical exchange coefficient and the wind speed. As a consequence, the present approach allows to employ realistic semi-empirical profiles for the eddy diffusivity and wind speed, in such manner that the inhomogeneous turbulence can be handle. The model performance have been evaluated using the well-known Copenhagen and Prairie Grass datasets. Then, the application of the statistical evalution procedure (Hanna, 1989) over the out coming results has show that the proposed analytical dispersion model produces a good fitting of the observational data.