پديد آورندگان :
پويان، سهيلا دانشگاه يزد - دانشكدۀ منابع طبيعي , زارع، محمد دانشگاه يزد - دانشكدۀ منابع طبيعي , اختصاصي، محمد رضا دانشگاه يزد - دانشكدۀ منابع طبيعي
كليدواژه :
تابع توزيع , گرد و غبار , مناطق خشك و بياباني , منطقۀ همگن
چكيده فارسي :
ﭘﺪﯾﺪة ﮔﺮد و ﻏﺒﺎر ﯾﮑﯽ از روﯾﺪادﻫﺎي ﻣﺨﺮب و راﯾﺞ در ﻣﻨﺎﻃﻖ ﺧﺸﮏ و ﺑﯿﺎﺑﺎﻧﯽ ﺟﻬﺎن اﺳﺖ. اﯾﻦ ﭘﺪﯾﺪه آﺛﺎر زﯾﺎنﺑﺎري ﺑﺮ روي زﻧﺪﮔﯽ اﻧﺴﺎن و ﻣﺤﯿﻂ زﯾﺴﺖ دارد. ﺗﻮﻓﺎنﻫﺎي ﮔﺮدوﻏﺒﺎر اﻓﺰون ﺑﺮ ﻫﺪر رﻓﺖ ﺧﺎك، اﯾﺠﺎد ﺧﺴﺎرات اﻗﺘﺼﺎدي ﺑﻪ ﺑﺨﺶﻫﺎي ﺻﻨﻌﺘﯽ، ﮐﺸﺎورزي و ﺷﺮﯾﺎنﻫﺎي ارﺗﺒﺎﻃﯽ، ﻣﯽﺗﻮاﻧﺪ ﺑﺎﻋﺚ ﺗﻬﺪﯾﺪ ﺣﯿﺎت اﻧﺴﺎن ﻫﻢ از ﻧﻈﺮ ﺳﻼﻣﺘﯽ و ﻫﻢ ﺗﻮﻟﯿﺪ ﻣﻮاد ﻏﺬاﯾﯽ ﺷﻮد. ﻫﺪف از اﯾﻦ ﭘﮋوﻫﺶ، ﺗﺤﻠﯿﻞ ﻣﮑﺎﻧﯽ ﺷﺎﺧﺺ ﮔﺮدوﻏﺒﺎر (DSI) در 44 اﯾﺴﺘﮕﺎه ﺳﯿﻨﻮﭘﺘﯿﮏ ﮐﺸﻮر اﺳﺖ. ﺑﺮ اﯾﻦ اﺳﺎس ﻧﺨﺴﺖ ﺷﺎﺧﺺ ﺗﻮﻓﺎنﻫﺎي ﮔﺮدوﻏﺒﺎر ﺑﺎ اﺳﺘﻔﺎده از دادهﻫﺎي ﺳﺎﻋﺘﯽ ﮔﺮدوﻏﺒﺎر ﺑﺮاي ﻫﺮ اﯾﺴﺘﮕﺎه، ﺑﻪ ﮐﻤﮏ ﺷﺎﺧﺺ (DSI) ﻣﺤﺎﺳﺒﻪ ﺷﺪ. ﺳﭙﺲ، ﺑﺎ اﺳﺘﻔﺎده از ﻣﯿﺎﻧﮕﯿﻦ ﻣﺎﻫﺎﻧﮥ ﺷﺎﺧﺺ ﺗﻮﻓﺎن ﮔﺮدوﻏﺒﺎر، ﺗﺤﻠﯿﻞ ﻣﻨﻄﻘﻪاي ﺑﺎ اﺳﺘﻔﺎده از روش ﮔﺸﺘﺎور ﺧﻄﯽ اﻧﺠﺎم ﺷﺪ. ﺑﺮاﺳﺎس ﻧﺘﺎﯾﺞ ﺗﺤﻠﯿﻞ ﻣﻨﻄﻘﻪاي، ﮐﺸﻮر ﺑﻪ 6 ﻣﻨﻄﻘﮥ ﻫﻤﮕﻦ از ﻣﻨﻈﺮ ﺷﺎﺧﺺ ﺗﻮﻓﺎن ﮔﺮدوﻏﺒﺎر ﺗﻘﺴﯿﻢ ﺷﺪ. ﻧﺘﺎﯾﺞ ﺣﺎﺻﻞ از ﺗﺨﻤﯿﻦ ﻣﻨﻄﻘﻪاي ﻧﺸﺎن داد ﮐﻪ ﺗﺎﺑﻊ ﺗﻮزﯾﻊ ﭘﯿﺮﺳﻮن 3 ﺑﻪ ﻋﻨﻮان ﺑﻬﺘﺮﯾﻦ ﺗﺎﺑﻊ ﺗﻮزﯾﻊ ﻣﻨﻄﻘﻪاي ﺑﺮاي ﮔﺮوهﻫﺎي ﻫﻤﮕﻦ 6 ،5 ،4 ،1 و ﺗﺎﺑﻊ ﻟﺠﺴﺘﯿﮏ ﺗﻌﻤﯿﻢ ﯾﺎﻓﺘﻪ ﺑﺮاي ﮔﺮوهﻫﺎي ﻫﻤﮕﻦ 2 و 3 اﺳﺖ. ﻧﺘﺎﯾﺞ ﺑﺮآورد و ﺗﺤﻠﯿﻞ ﻣﮑﺎﻧﯽ ﺷﺎﺧﺺ ﮔﺮدوﻏﺒﺎر، در ﺑﺴﯿﺎري از ﭘﮋوﻫﺶﻫﺎي ﻣﺤﯿﻂ زﯾﺴﺘﯽ، ﺗﺼﻤﯿﻢﺳﺎزي و ﻓﺮآﯾﻨﺪ ﻣﺪﯾﺮﯾﺖ ﺑﺮﻧﺎﻣﻪﻫﺎي ﺑﯿﺎﺑﺎنزداﯾﯽ و ﻣﻘﺎﺑﻠﻪ ﺑﺎ ﺗﻮﻓﺎنﻫﺎي ﮔﺮد و ﻏﺒﺎر ﺑﻪ ﮐﺎر ﻣﯽرود.
چكيده لاتين :
Dust event is one of the common and destructive phenomenon in arid and desert regions. This phenomenon has negative impacts on human life and environment. Dust storms, in addition to soil loss, can cause and aggravate health problems, food production reduction, economical damages into the industrial, agricultural and communication sections. Therefore, accurate investigative of this phenomenon is necessary. The aim of this research was regional analysis of dust storm index (DSI) in 44 meteorological stations of Iran. At first stage, the dust storm index for each station was calculated using hourly dust data. Next, monthly averages of dust storm index (DSI) were used for regional analysis using linear moments approach. Based on regional analysis, the study area is divided to six homogeneous dust storm index regions. Pearson Type III (PE3) and Generalized Logistic (GLO) distribution models were the best regional distribution models for 1, 4, 5, 6 homogeneous regions, and 2, 3 homogeneous regions, respectively. Estimation of the dust storm index and its regional analysis can be used in many environmental studies, decision making and management processes in relation to combating desertification and dust storms.
