Dust Risk Assessment in Northwest of Iran

 One of the phenomena that has been transformed into a permanent covenant with western provinces for many years is the phenomenon of dust. This phenomenon has involved most western and southern provinces since 1988. Various reasons include human interference in the unreasonable use of surface and underground water resources, degradation of vegetation, soil degradation by agriculture and frequent use of land, along with the exacerbation of some natural factors such as drought and climate change. In this study, for statistical analysis, drought-climatic data on a daily basis for the 20-year statistical period from 1991 to 2020, 19 stations Synoptic Northwest of the country was prepared by the country's meteorological organization. The purpose of this study is to investigate the climate-related climatic phenomena caused by microstates in the northwest provinces of the country for different months of the year, along with the identification of their continuity and frequency, as well as the main source of dust entering the study area.   The method of work is as follows: First, the frequency of the dusty phenomenon was monthly, seasonally and annually, as tables and charts.. Then data on the number of dust events in different years were specified and entered into ArcGIS software. The results of the survey showed that the magnitude of the damage was not limited to the threat of agricultural land and industrial land, but rather to disrupt the normal life of the people, clearly has become a serious environmental threat and has led to the reaction of public opinion. Recent drought, imposed war, agriculture, damming, water warfare and the policy of transferring water from water-saturated areas to low water areas in Khuzestan and Ilam, where the two regions are the main effects of the micro-organisms.