Investigation of Effective Parameters on Mass Movement by Using of Landslide Hazard Zonation Maps (Case Study: Northern Karoon Basin)

Regarding their nature and their variety, and hazards that landslides have for humans life and properties, landslides have always been the center of attention and study by scientist from different fields of study such as geology,engineering geology, geomorphologies. These phenomena have a complex mechanism and different factors and variables could be effective in their occurrence, the numerous studies have been done to recognize the effective factors, classification, zonation and modeling. Accordingly, it was tried to study the landslides in Kahredan basin in northern part of Semirom, Dena Mountain in Zagros zone suburban area in Isfahan province and provide a landslide hazard zonation map by using the statistical method and the hazard map which has the most accuracy and precision will be selected. So finally it was specified the order of effective parameters in landslides. According, by selecting following six parameters including to slope aspect, lithology, land use, rainfall and distance to drainage, it was provided landslide inventory map by using following four methods. Information value, linear regression, discriminate analysis and area density. The statistical method of information value was recognized the best method of landslide hazard zonation which is capable of using in planning and urban developments. The effective parameters in landslides according to their importance are including to lithology, distance to drainage, land use, slope, aspect and rainfall respectively.