A Spatial and Temporal Survey of Dust Hazards in Kohkilouyeh and Boyerahmad Provinces

Dust is one of the common phenomena in arid and semi-arid regions and can have significant effects on the climatic conditions of an area. Therefore, the present study was conducted to investigate the dusts in Kohkiluyeh and Boyer Ahmad provinces. In this regard, codes 6, 7, 8, 9, 31, 32 and 35 of dusts were investigated at Yasouj, Dugonbadan, Thay, Dehdasht, Likak and Imamzadeh Jafar stations on daily, monthly and annual basis. At first, the frequency of daily, monthly and yearly codes was checked at all stations and their daily calendar was prepared. Then the zoning maps from all of the codes were mapped in the months of the year and finally, the number of days with dust was investigated at Yasouj and Dogonbodan stations. The results showed that Dogonbadan Station with the frequency of 2381 had the highest dust incidence during the statistical period. The review of codes indicates that the two codes 6 and 7 were the most frequent at all stations. Code 6 at Dogonbadan, Likak, Imamzadeh Jafar and Thirud stations in 2012 was at Yasouj Station in 2009 and at Dehdasht station in 2008, with the highest frequency. Code 7 was also reported at Dogonbadan Station in 1992 and at Yasouj Station in 1371. The process of dusts at Yasouj and Dogonbadan stations also indicate that both cold-run stations in the year have had a drought-reducing process and the warm months have not been trendy. Both stations showed an increasing trend on an annual basis