Investigating Spatial Distribution of Pollutants in the Town of Baghershahr, Tehran, Iran

Since the mid-20th century, alluvial plains in the south of Rey township, due to the vicinity to Tehran city and roads, has favored the establishment of giant plants such as Tehran oil refinery and its auxiliary that air and land pollutions are inevitably part of such industries. This study is provided to investigate the sources and spatial spreading of a contaminant in the air, soils, and plants of Baghershar town. The studied town locates in 4 km from Tehran and has an area of 551.5 hectares. The data obtained from the measurements had been done by Baghershahr municipality in 2016. Resource data were arranged within a GIS framework and it is used interpolation methods to produce zoning maps. Findings show that in half of the time, the concentration of particles in the air, exceeds the standard limit, and for soils, the average amount of 15362 mg/kg of TPHs indicate high contamination. Combined zoning maps showed that southeast of the city was more polluted. This zoning map is highly consistent with the zoning of pollutants in the soil and is more or less consistent with the zoning in plants, but does not conform to zoning map of air pollutants. Plants and industrial complexes, loading, and transferring fuels, and transportation were a source of atmospheric pollution. Penetration of contaminants into soils and plants is often from non-atmospheric origins, but passing the wastewater channel alongside the town, and green spaces irrigation with polluted water extracted from wells, affecting contaminants spreading.