Examining the potential landslide in Chaharmahal Va Bakhtiari province by applying multi criterion models of decision making

Recognizing talented areas of landslide phenomenon and ranking them as a main hazard in mountainous areas of Iran can be regarded as one of the primary steps in expansive and developing planning. In the present article the conditions of landslide in Chaharmahal Va Bakhtiari province are assessed by using TOPSIS and AHP models. In these methods the regarded choices are the townships of the province (Shahrekord, Koohrag, Farsan, Boroujen, Ardal and Lordegan) and the effective criterions are slope, the application of lands, geology components, height, water way's compression, annual precipitation and the distance from the road. After preparing necessary information layers in GIS area and giving mark to any effective criterions, the result of using mentioned models finally shows that the geology agent with the approximate weight of 0/2669 is the most important criterion and the compression index of water ways with the approximate weight of about 0/0192 is the least important criterion. Also checking the potential condition of landslide occurrence in the studied area indicates the difference between the application of AHP and TOPSIS models. The mentioned difference prepared the condition for using prioritizing strategies (the average of ranks, Borda and Kopeland) by combining the results from TOPSIS and AHP models. Results show the most occurrence potential in Ardal, Koohrang, Farsan townships and the least one in Boroujen township.