Evaluation of the dispersion of pollutants from mobile sources of the pollutant (studying area: Ahvaz)

Today pollution in the large cities has become a basic challenge for the environment. In Ahwaz, 60% of the pollution is related to the mobile sources which produce a huge amount of various pollutants including CO and PM10 that affect the life of the residents in Ahwaz. CO is an important pollutant emitted to the atmosphere from traffic. Generally, pollutant emission to the air has a significant effect on air pollution control. Therefore, the of this study was to investigate the dispersion and density of CO and PM10 from mobile sources.
In this study, at first the study area was zonned (3×3 Km). Then, in each net the number of cars were estimated according to the types of car and hours of traffic. Consequently, the whole diffusion of CO and PM10 concentration in each net was estimated according to gram per second for each car considering the diffusion factors, type of consumed fuel and the distance drived. Finally, for better illustration of places, graphic exhibition, distribution way of the mentioned pollutant and diffusion, GIS a software was used.
The pattern of pollutant diffusion for CO and PM10 emitted from cars, which is calculated by the model, shows that most of the polluted areas are the business and administrative centers. These pollutants were calculated to be very low and even zero at the outskirts of the city.