RT - Journal Article T1 - Relationship of Some Climatic Parameters to the Dust Deposition Trend in the Western and Eastern Half of Tehran Metropolis JF - JSTNAR YR - 2021 JO - JSTNAR VO - 25 IS - 2 UR - http://jstnar.iut.ac.ir/article-1-4015-en.html SP - 175 EP - 190 K1 - Dust deposition rate K1 - Climatic parameters K1 - Stepwise regression K1 - High-rise building effects K1 - The western and eastern half of Tehran metropolis AB - In this study, spatial-temporal variation of dust deposition rate in the western and eastern half of Tehran and its climatic parameters affecting were studied. At 34 points in the city, dust samples were collected by glass traps from the roof, for twelve months, and the climatic data were obtained and analyzed from relevant organizations. The highest deposition rate is in the western half of the city and its total amount has varied from 54.52 to 121.21 g/m2/y. In both halves of the city, summer has the highest dust deposition rate and its central areas have the highest amount. There were significant positive correlations between dust deposition rate with temperature and medium wind speed, and there were significant negative correlations between dust deposition rate with rainfall and relative humidity in all months, which justifies the high dust deposition rate in the dry seasons of the year. The results of stepwise regression showed that rainfall was the most important factor affecting the dust deposition rate in both halves of the city. The city of Tehran has a special geographical location the presence of mountains like a barrier has prevented dust from leaving the city and the air inlet corridor of Tehran has faced problems due to the expansion of building construction and high-rise building. Other factors affecting the rate of dust deposition in this city, in addition to the distance from the main source of dust production, atmospheric parameters can be mentioned the existence of barren lands around the city, vegetation cover, construction operations, and traffic. LA eng UL http://jstnar.iut.ac.ir/article-1-4015-en.html M3 10.47176/jwss.25.2.42561 ER -