نوع مقاله : مقاله پژوهشی
1 گروه جغرافیای طبیعی، دانشگاه تهران
2 کارشناس ارشد اقلیم شناسی، دانشکده جغرافیا، دانشگاه تهران
عنوان مقاله [English]
In recent decades the problems of transportation in Tehran, One of the biggest problems occurred in the city, which is one of the consequences air pollution and the damage it caused to the national economy billions of rials. Research methodology Based on the study of and search a library, Statistics and calculations using data to understand how the distribution of PM2.5 pollutants emitted from vehicles. By using micro-climate model ENVI-met Influence of climatic parameters In distribution PM2.5 pollution in the areas of Vali Asr Avenue were studied. Data on the amount of pollutant PM2.5 Near Earth's surface By using diffusion coefficient formula and calculate the amount of pollutants produced Each of the different sources of energy is obtained. Distribution of PM2.5 emissions on two different days in terms of climatic conditions to 7:30 am October 29 and November 6, 2013 is analyzed and compared. The results show that the dispersion of pollutants published in Vali Asr street Between accumulation and distribution of pollutants is tangible relationship with wind speed and direction. Places where the wind speed has increased to some extent correlated with areas where there is a high concentration of pollutants. Also wind direction is guided into buildings and other obstacles After colliding with the obstacle Slowed down and increased the concentration of pollutants.