The behaviour of spectra of turbulence in the surface layer is used to estimate the vertical eddy diffusivity coefficient in order to describle the dispersion of pollutant emitted by a thermoelectric power plant located in the south of Brazil. The simulation of the transport of the material is done with an analytical solution of advection-diffusion equation. The meteorological inputs for this model were obtained in field campaigns conducted in the region. The data set analysed comprised twenty-four hours of turbulence measurements. The data set of the model are compared with results obtained by the same model but using different parameterization for the eddy diffusivity coefficient.
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