مدل سازي عرصه هاي حساس به وقوع زمين لغزش و شناسايي عوامل موثر بر وقوع آن با استفاده از مدل آنتروپي شانون (مطالعه موردي: حوضه آبخيز بار نيشابور)

Modeling and identification of areas susceptible to landslides affecting factors of using the Shannon entropy model (Case study: watershed time Nishapur

ﺗﻬﯿﻪ ﻧﻘﺸﻪ ﺣﺴﺎﺳﯿﺖ زﻣﯿﻦ ﻟﻐﺰش، ﭘﯿﺶ زﻣﯿﻨﻪاي در ﺷﻨﺎﺧﺖ ﻋﻮاﻣﻞ ﻣﺆﺛﺮ ﺑﺮ وﻗﻮع زﻣﯿﻦ ﻟﻐﺰش، رﺧﺪاد آن، ﻣﺪﯾﺮﯾﺖ ﺧﻄﺮ و روشﻫﺎي ﭘﯿﺸﮕﯿﺮي از ﺧﻄﺮ و رﯾﺴﮏ اﺳﺖ. ﻫﺪف از ﺗﺤﻘﯿﻖ ﺣﺎﺿﺮ اوﻟﻮﯾﺖ ﺑﻨﺪي ﻋﻮاﻣﻞ ﻣﺆﺛﺮ ﺑﺮ وﻗﻮع زﻣﯿﻦ ﻟﻐﺰش و ﭘﻬﻨﻪ ﺑﻨﺪي ﺣﺴﺎﺳﯿﺖ آن درﺣﻮﺿﻪ ﺑﺎر ﺑﺎ اﺳﺘﻔﺎده از ﺷﺎﺧﺺ اﻧﺘﺮوﭘﯽ ﺷﺎﻧﻮن اﺳﺖ. ﺑﺮاي ﻧﯿﻞ ﺑﻪ اﯾﻦ ﻫﺪف 12 ﻋﺎﻣﻞ ﺗﺎﺛﯿﺮﮔﺬار ﺑﺮ زﻣﯿﻦ ﻟﻐﺰش در ﻣﻨﻄﻘﻪ ﻣﻮرد ﻣﻄﺎﻟﻌﻪ ﻣﻮرد ﺗﻮﺟﻪ ﻗﺮار ﮔﺮﻓﺖ و ﻧﻘﺸﻪﻫﺎي ﻣﺮﺑﻮط ﺑﻪ ﻋﻮاﻣﻞ ﻣﺬﮐﻮر در GIS ﺗﻬﯿﻪ ﮔﺮدﯾﺪ. اوﻟﻮﯾﺖ ﺑﻨﺪي ﻋﻮاﻣﻞ ﻣﻮﺛﺮ ﺑﺎ ﺑﻬﺮه ﮔﯿﺮي از ﺷﺎﺧﺺ آﻧﺘﺮوﭘﯽ ﺷﺎﻧﻮن ﻻﯾﻪﻫﺎﺋﯽ را ﮐﻪ ﺑﯿﺸﺘﺮﯾﻦ ﻧﻘﺶ را در وﻗﻮع زﻣﯿﻦ ﻟﻐﺰش داﺷﺘﻨﺪ ﻣﺸﺨﺺ ﮐﺮد. در ﻧﻬﺎﯾﺖ ﻧﻘﺸﻪ ﭘﻬﻨﻪ ﺑﻨﺪي ﺣﺴﺎﺳﯿﺖ زﻣﯿﻦ ﻟﻐﺰش ﺑﺎ اﺳﺘﻔﺎده از ﺷﺎﺧﺺ آﻧﺘﺮوﭘﯽ ﺷﺎﻧﻮن ﺗﻬﯿﻪ ﮔﺮدﯾﺪ و ﺑﺎ ﻣﻨﺤﻨﯽ ROC ﻣﻮرد ارزﯾﺎﺑﯽ ﻗﺮار ﮔﺮﻓﺖ و دﻗﺖ ﻣﺪل در ﺣﺪ ﺧﯿﻠﯽ ﺧﻮب )81/24 درﺻﺪ( ﺑﺎ اﻧﺤﺮاف اﺳﺘﺎﻧﺪارد 0/0389 ﺑﻪ دﺳﺖ آﻣد

Landslide Susceptibility Mapping, a background on factors affecting the landslide, its occurrence, risk management and risk prevention. The aim of this study is to prioritize the factors affecting landslide susceptibility mapping and basin load it using the Shannon entropy index. To achieve this goal were taken into account 12 factors affecting the landslide was prepared to study and map the factors mentioned in the GIS. Prioritize the factors identified by the use of Shannon entropy index layer, which had a role in the occurrence of landslides. The landslide susceptibility zoning map was prepared using Shannon Entropy Index and evaluated with ROC an‎d obtained accuracy of the model as well (24/81%) with a standard deviation of 0389/0.