Analyzing the Factors Affecting Occurrence of Landslide in NAVROUD Basin using AHP Model (Tälesh City -Iran)

Landslides and the combination of natural and human factors causing this phenomenon are due to the high incidence of loss They. Factors in the occurrence of slip hazard of region departments that can help reduce the damage caused by the dumping phenomenon. With this aim it is necessary to map landslide hazard areas to be prepared for this. Zoning of Landslide is one of the ways that it can help to identify critical areas in terms of slope stability. This study aimed to select the most efficient identification of factors causing landslides Navroud efforts have been carried out in the basin. After field studies and preparation of the maps and data layers available resources, factors of landslide area were evaluated and the most important factors of geology, slope, and distance of roads, aspects, fault, and land use and near the river were identified. Weight of each of the factors of hierarchical analysis or AHP with comparing paired mentioned factors computed after mapping zonation of landslide risk with respect to the final weight of each factor to this result, we note that the lithology, slope, road orientation gradients in the basin attempting to be the most important factors of landslide area. According to The landslide zonation map, the catchment area was divided into five areas susceptible to landslides and landslide risk to safety was high. Most mass movements Solifluction areas of high grassland basin in the north and east facing slopes Earth slip around forest roads and mountain roads, especially the most happening shows