Modelling of Pollutant Distribution around Tabriz Thermal Power Station with Using ISCST3 Model

Air pollution modeling is an essential tool for air pollution studies. Also, considering that observations are often sparse, models can be used to make inferences on concentrations where there is no information. Due to switching fuel of Tabriz thermal power station from natural gas to mazut in the winters and increasing amount of pollutants emission, also considerable decrease in temperature, pollutants are not distributed well at the region around the emission sources which leads to increasing of pollutants concentration. The current study aimed to consideration of pollutants (NOx and SO2) concentration in areas adjacent to Tabriz power station during winter and comparison of concentration with clean air standards of Environmental Organization of Iran as well as National Ambient Air Quality Standards (NAAQS). Therefore, this study used the ISCST3 (Industrial Source Complex-Short Term) model to simulate pollutant distributions on 3 months period in order to assess the ground level concentration of pollutant in the study area. The results show that SO2 concentration on 24 hours period is more than air pollution standards but NOx concentration is lower than National and International air pollution standards.