Using GIS & RS in Mass Movements Hazard Zonation -A Case Study in Germichay Watershed, Ardebil, Iran

Studying of landslides triggering factors and zonation of their hazards could help effectively in reducing their damages that this research is an effort in this connection and with studying of landslides triggering factors and mass movements hazard zonation methods, Germichay watershed has been zoned with Analytical Hierarchy Process (AHP) method, and in the end, the regional model has been presented. Methodologically, at first the landslides triggering factors of the area were studied and the important factors with their priority arrangement including lithology, slope, land use, lineament factors (road & river), precipitation, aspect and altitude were investigated. Then their maps with using GIS & RS were supplied and classified. Also the landslides distribution map was supplied with using GPS and GIS techniques. In Analytical Hierarchy Process (AHP) method, at first, the proposed factors for zonation (the seven factors that mentioned in the past) have compared couple and their weights have determined with using Analytical hierarchy process. Also, in this paper cumulative curve, has been used because of to classification the factors, and with due regard to per class landslides percentage, their values have been determined. In the end, with regard to earned weights for each factor and their class’s values, the zonation model was presented. Also in analyzing the results and assessing the model, was used the GIS technique, so as the zoned map has been crossed with landslides distribution map and the model accuracy was confirmed with determining the landslides percentage in per zoned class.