Evaluation and Zonation of Air Pollution by using Vikor (Case Study: Tabriz)

If air pollution issue is not one of the acutest problems caused by mechanized civilization, undoubtedly it is one of the most complicated ones because air is spread everywhere and is being used in 24 hours. Gathering of most of the people in urban areas and high standard of living expectation with minimum price without any attention to the environment has caused to increase of air pollution density in dangerous and noticeable level. Now the growth of cities especially in developing countries causes urbanization and environmental waste. To reach a sustainable development in cities, reduction and control of air pollution can be very important. In this research 8 factors: overcrowding, precipitation, DEM (digital elevation model), distance from connecting roads, distance from green space, distance from CBD (central business district), distance from industrial centers and land use have been used as effective factors in air pollution. The information layers have been prepared in GIS (geographic information system). The evaluation and normalization of the criteria maps were done simultaneously using the fuzzy method. The analytical hierarchy process was used to weigh the factors. The air pollution zonation map was prepared in the environment of Edisi and using the Vikor method. According to The results obtained from the model, the direction of West, North- west and The Central Part of The city has the most pollution zonation. In addition, according to the results of the study for preparing the air pollution zonation map in Tabriz, the usage efficiency of the membership function in the fuzzy steps and Vikor model have been approved, and according to which, using the multi variate analysis techniques lead to increased attention and speed of the work as well as the better quality and variety in the results of the study.