پديد آورندگان :
فاطمي نيا, فخري سادات دانشگاه محقق اردبيلي , سبحاني, بهروز دانشگاه محقق اردبيلي , مسعوديان, ابوالفضل دانشگاه اصفهان
چكيده فارسي :
ﺗﺼﺎوﯾﺮ ﻣﺎﻫﻮارهاي ﺑﻪ ﻋﻨﻮان اﺑﺰارﻫﺎي ﺟﺪﯾﺪ، اﻓﻖ و اﺑﻌﺎد ﻧﻮﯾﻨﯽ را ﺑﺮاي ﭘﺎﯾﺶ اراﺿﯽ در اﺧﺘﯿﺎر ﻗﺮار ﻣﯽدﻫﻨﺪ. در اﯾﻦ ﺑﺮرﺳﯽ ﺑﻪ ﻣﻨﻈﻮر ﺗﻌﯿﯿﻦ ﻧﻮاﺣﯽ ﺟﻐﺮاﻓﯿﺎﯾﯽ ﻫﻤﮕﻦ از ﻧﻈﺮ ﮔﺴﺘﺮهي ﺑﺮگ از ﺗﺼﺎوﯾﺮ دورﺳﻨﺠﯽ ﻣﻮدﯾﺲ ﺗﺮا-آﮐﻮا در ﺑﺎزهي زﻣﺎﻧﯽ 1381-1395 ﺑﺎ ﺗﻔﮑﯿﮏ ﻣﮑﺎﻧﯽ ﯾﮏ ﮐﯿﻠﻮﻣﺘﺮ ﺗﻔﮑﯿﮏ زﻣﺎﻧﯽ 8 روزه اﺳﺘﻔﺎده ﺷﺪه اﺳﺖ. ﭘﻬﻨﻪﺑﻨﺪي و واﮐﺎوي ﮔﺴﺘﺮهي ﺑﺮگ ﺑﺎ اﺳﺘﻔﺎده از ﻧﺮم اﻓﺰار ﻣﺖﻟﺐ و ﭘﺎﯾﮕﺎه اﻃﻼﻋﺎﺗﯽ ﮔﻮﮔﻞارث اﻧﺠﺎم ﺷﺪ. ﺑﺮاي اﯾﻦ ﻣﻨﻈﻮر، اﺑﺘﺪا ﺑﻪ ﻣﻮزاﺋﯿﮏﺑﻨﺪي و ﺗﻌﯿﯿﻦ ﻗﻠﻤﺮو اﯾﺮان در ﻣﺠﻤﻮﻋﻪ دادهﻫﺎي ﻣﺎﻫﻮارهاي ﻣﻮدﯾﺲ ﭘﺮداﺧﺘﻪ و ﺳﭙﺲ ﺑﺎ اﯾﺠﺎد ﭘﺎﯾﮕﺎه داده در ﻣﺖﻟﺐ اﻧﺠﺎم واﮐﺎوي ﺧﻮﺷﻪاي، ﭘﻬﻨﻪﺑﻨﺪي اﻧﺠﺎم ﺷﺪ. ﺑﻪ ﻣﻨﻈﻮر واﮐﺎوي ﺑﻬﺘﺮ ﮔﺴﺘﺮهي ﺑﺮگ از دادهﻫﺎي ﻣﯿﺎﻧﮕﯿﻦ ﺑﻠﻨﺪﻣﺪت دﻣﺎ و ﺑﺎرش در ﺑﺎزهي زﻣﺎﻧﯽ ﻣﻮرد ﻧﻈﺮ ﻧﯿﺰ اﺳﺘﻔﺎده ﮔﺮدﯾﺪ. ﻃﺒﻖ اﯾﻦ ﺗﺤﻠﯿﻞ46/12 درﺻﺪ از ﮔﺴﺘﺮهي اﯾﺮان ﺗﺤﺖ ﺣﺎﮐﻤﯿﺖ ﭘﻮﺷﺶ ﮔﯿﺎﻫﯽ اﺳﺖ. ﭘﻬﻨﻪي ﺑﺴﯿﺎراﻧﺒﻮه، اﻧﺒﻮه، ﻣﺘﻮﺳﻂ ﺗﻨﮏ ﭼﻬﺎر ﭘﻬﻨﻪاي ﻫﺴﺘﻨﺪ ﮐﻪ در ﮐﺸﻮر ﺷﻨﺎﺳﺎﯾﯽ ﺷﺪهاﻧﺪ. اﯾﻦ ﭼﻬﺎر ﭘﻬﻨﻪ ﺑﻪ ﺗﺮﺗﯿﺐ ﺑﺮ 6/9 ،2/67، 27/29 ،9/26 درﺻﺪ از ﺳﺮزﻣﯿﻦ ﺣﺎﮐﻢ ﻫﺴﺘﻨﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ در ﺗﻤﺎم ﭘﻬﻨﻪﻫﺎي ﻣﻮرد ﺑﺮرﺳﯽ، ﮔﺴﺘﺮهي ﺑﺮگ در دورهي ﮔﺮم ﺳﺎل ﺑﻪ دﻟﯿﻞ دﻣﺎي ﺑﺎﻻ در اﯾﻦ دوره و وﺟﻮد ﺑﺎرشﻫﺎ در دورهي ﺳﺮد پيشين داراي درصد بيشتري ميباشد. دامنه هاي شمالي البرز، جنگلهاي هيركاني، جنگلهاي گلستان، جنگلهاي ارسباران از جمله مناطقي هستند كه مناطق مختلف آنها در تمامي پهنه ها وجود دارد. علاوه بر جنگلها، مناطقي كه براي هر يك از پهنه ها شناسايي شدهاند عموماً شامل كشتزارها ميشود.
چكيده لاتين :
Satellite images as new tools, provide new dimensions for land monitoring. In this study, in order to determine the homogeneous geographical areas in terms of leaf area, the remote sensing images of the Terra-Aqua Modis during the period of 2002-2016 with a spatial resolution of one kilometer and 8 days’ time interval used.
Leaf area was Zoning and analysis using the Matlab software and the Google Earth database. For this purpose, first, the mosaic and determination of the territory of Iran in the satellite data set of the Modis was determined. Then, a database in the field of cluster analysis, choropleth zoning created. Long-term mean temperature and precipitation data were also used in order to better understand the range of the leaf area. According to this analysis, 39.9 percent of Iran's vast vegetation is governed. The four zones identified in the country are the large, massive, moderate, and narrow areas. These four domains are respectively 0.89, 0.001, 3.31, and 35.76 of the land. The results showed that in all studied areas, the leaf area had a higher percentage during The warm period of the year due to the high temperature in this period and the presence of precipitation in the early cold season. The northern slopes of the Alborz, Hyrcanian forests, Golestan forests, Arasbaran forests are areas where there are different regions in all zones. In addition to forests, the areas identified for each generally include fields.
