Evaluation tow method Analytic Hierarchy Process and Fuzzy in landslide hazard zonation.(The study area of Beheshtabad Basin in Chahar Mahal Bakhtiari Province)

Landslide is one of the natural disasters which causes a lot of annual damage directly or in directly in the world. Landslide zones are extended in the northern and the western part of Iran. Land use change and high rainfall are two effective factors on mass movement in Beheshtabad basin. This paper follow to compare two method AHP and FAHP that is used in landslide hazard zonation. First of all، hazard zonation map was prepared with AHP method using inconsistency rate 7%. Then، fuzzy membership function definded for each the parameters، and hazard zonation map was prepared to the base of FAHP method. Finally، two maps were compared and results show that FAHP method has higher accuracy than AHP. In addition،57. 7% of landslide have been located in moderate elevation with 680-760 mm rainfall in Beheshtabad watershed.