Geomorphology of Sanandaj - Marivan New Road and Slope Instability Zonation

One of the major natural hazards in the mountain ways are mass movements and land slips. This phenomenon disturbs the balance of hill slope when we construct the roads. In this study, with the goal, the potential of slip in new road Sanandaj - Marivan has been evaluated by using geographic information system. Litho logy, slope, slope direction, distance from the road, precipitation, distance from the fault, distance from drainage network are selected as the main parameters of the effective range and of variation of the dominant road. After preparing the required information, layers are used for the effective parameters, (and to cut each layer with landslides distribution layer) action scheme risk zone, mapping slip model using two week weight and analysis of hierarchical and GIS software with ILWIS. The results of the comparison model and the implementation of the slip road on the route also introduced hierarchical superiority analysis that the slip roads, the event have intensified. So the 67 percent of landsides in the 200-meter distance with road consistently have occurred. Among the common factors affecting in slip road and distance from the path of resistance and the rock have occurred the most effect way around the landslides. On the first variable, the map of area compared from classified models mentioned, implementation of unstable path way and many of them trench along the road shows as well. Results also refer to the same parameters which has been able to slip possible in order to secure road to estimate.