Routing of dust storm using Suspended Particulates Concentration and meteorological models in Hamadan Province

Dust is one of the natural hazards that occur mainly in arid and semi-arid area of the world such as in Iran. In recent years, dust storms have been one of the most important air pollution crises in Hamadan province. Identifying the dust and sand sources, it is the first step in the management and control of this Phenomenon. Thus, in this paper, identification of dust sources in Hamadan province using Aerosol Optical Depth (AOD) from the MODIS satellite images and numerical modeling to predict airflow is discussed from 2008 through the end of 2018. In the next step, using the HYSPLIT model, the path of motion of particles and their source were determined at three levels of 500, 1000 and 1500 meters for 48 hours before the storm for outside sources and 18 hours for inside sources. The meteorological data of the model was obtained from a 0.5 degreess GDAS. Finally, its movement from source to Hamadan urban area was monitored by using GIS and Spatial Analysis Tools. The results showed that the origin of the entering dust phenomena in this city are from three sources including inside the province (Famenin, Malayer, and Razan county), outside the province (such as Kurdestan, Markazi, and Khuzestan province), and out of Iran (Western part of Iraq, Syria, Jordan and northern part of Saudi Arabia). So, it is necessary to monitor the spatial patterns of dust sources in the western region of Iran. In different years. In conclusion, the combination of remote sensing data, the Hysplit model, and field-based data could well show dust-affected corridors.