Intercomparison of different regulatory and Eulerian dispersion models: anapplication for the electric power plant in Rhodes Island

This study tries to inform the user of the abilities and limitations of dis persion models by comparing their differences in air pollution estimations. In particular, an intercomparison between the results of Eulerian and regu latory dispersion models for the new electric power plant in Rhodes island is carried out, in order to emphasize their differences. The Eulerian model s used in this study are Airpol and UAM, the latter also incorporating phot ochemistry. The input meteorological parameters and diffusion coefficients for both of these models are provided from the non-hydrostatic prognostic m esoscale meteorological model TVM. The regulatory models that have been use d are Plumes and CTDMPLUS which are both Gaussian models and use hourly rou tine meteorological data as input. The simulations have been carried out fo r one year, and the worst results have been compared. A satisfactory agreem ent was found among the results for long-term predictions, while a spatial variation was observed for short-term predictions.