Detection and tracking of dust phenomena and determination of its origin using AOD index obtained from MODIS sensor data in Qom province

Subject Areas : Agriculture, rangeland, watershed and forestry

Hossein Tavakoli Neko ¹ , Abbas Pourmeidani ² , Seyed Mehdi Adnani ³

1 - Assistant Professor, Forests and Rangelands Research Department, Qom Agricultural and Natural Resources Research and Education Center, AREEO, Qom, Iran
2 - Assistant Professor, Forests and Rangelands Research Department, Qom Agricultural and Natural Resources Research and Education Center, AREEO, Qom, Iran
3 - Forests and Rangelands Research Department, Qom Agricultural and Natural Resources Research and Education Center, AREEO, Qom, Iran

Received: 2022-06-28 Accepted : 2022-08-09 Published : 2024-09-29

Keywords: optical depth, dust, Qom, remote sensing,

Abstract :

Dust is one of the phenomena in arid and semi-arid areas that pose a lot of environmental hazards. This study was conducted with the aim of identifying dust and tracking them, using data based on remote sensing and GIS, zoning intensity and classification of centers and prioritizing areas in terms of dust and preparing a zoning map of dust phenomenon in Qom province. Meteorological data for the years (2015-2018) were prepared from meteorological stations in Qom and MODIS sensor images were used to highlight the dust phenomenon. Dust events with a visibility of 1000 meters and less in Qom province in different years (2018-2015) had a different trend and more than 177 dust events occurred in this period. In general, the maximum dust phenomenon was in the cold seasons and the minimum was in the spring and summer seasons. Examination of the trend of changes in AOD showed that the maximum value of light depth varied in different years and months. The maximum amount of high light depth continuity was in 2015, which lasted from April to June. Also, changes in temperature and rainfall showed that the general trend of temperature and rainfall was increasing in the study area. Due to the increasing trend of desertification and climatic characteristics such as increasing temperature and decreasing rainfall and consequently the occurrence of drought and improper land use, has increased the centers of dust harvest with the frequency of occurrence and its amount and turned it Has become an uncontrollable environmental challenge.