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The concentration of a pollutant in the air can be described by the advection-diffusion equation, which uses a vertical dispersion parameter that represents the dispersion of a plume in the ambient and it needs to be estimated. This paper presents a comparison between the concentrations estimated from the vertical dispersion coefficients in integral formulation, solved numerically via Gauss-Legendre quadrature, and from an algebraic formulation, both described in the literature. For the two formulations, it was also tested two values to the average dissipation rate, one being function of CBL height and atmospheric stability and the other a value reported in the literature. From the integral parameterization, pollutants concentrations were estimated using the equation of laterally integrated Gaussian plume, which were confronted with experimental data of Copenhagen. All results were statistically analyzed to validate the model. The best results were those where an integral formulation was used to represent the vertical dispersion coefficient, and using the value of 0.65 for the average rate dissipation.

Avaliação da representatividade do parâmetro de dispersão vertical no cálculo da concentração de um contaminante integrada lateralmente