Geospatial modeling for land Slide at western of Guilan

Masal district, like other parts of western of Guilan, is exposed to a number of natural hazards, including landslides due to its special conditions. In this study 91 identified landslides indicate the high importance of this phenomenon and its associated risks to the Masal. Therefore, the present study was based on a descriptive and analytical method, based on library studies and the use of existing documents and articles and researches previously done. Topographic maps with scale of 1.25000 and 1.50000 and maps Geology was used on a scale of 1.000.000. The GPS was used as research tool and Analytical Hierarchy Process (AHP) as algorithm. Data were analyzed in AutoCAD environment using ArcGIS software. In AHP method dual comparison of factors and components as the best zoning method was selected. Data were combined by using ArcGIS software and extraction of restriction and vector models and three-dimensional models such as DAM and TIN models. As a result of the work, not only in the hierarchical analysis method but also in the frequency of each of the factors, slopes of 10 to 30 degrees had the highest percentage of landslide.