چکیده:
The occurrence of landslides in the northern regions of the country is increasing due to heavy rainfall, improper land use, and erosion-sensitive formations. One of the important solutions for reducing damage caused by landslides is the evaluation and zonation of landslide-prone areas through the preparation of landslide hazard zonation maps. There are various methods for zonation, among which the Anbalagan method was used for the study area. In this method, required maps such as slope, slope direction, land use, geology, structural geology, groundwater, and working units were prepared in the GIS environment using Arcmap software. After scoring the necessary factors in the Anbalagan method, the final zonation map of the area was presented. Finally, to evaluate the accuracy of the mentioned model, a landslide distribution map of the study watershed was prepared; by comparing the landslide distribution map with the landslide zonation map using the Anbalagan method, it was determined that most of the landslides occurring in this watershed were located in the high-hazard zone provided by the presented model.
خلاصه ماشینی:
(2006): Assessment and zonation of slope instability hazard in the central part of the Zab basin (Sardasht city) using the Anbalagan method, Modares Journal of Human Sciences.
R. (1994): Investigation of factors affecting the mass movement of the Velasht Lake watershed and methods of prevention and control, Master's thesis, Watershed Management, Faculty of Natural Resources, University of Tehran.
2-4- Maps of factors affecting landslides: Assessment and Zonation of Landslide Hazard using Anbalagan Method in ArcGIS environment Case Study: Chakrud Watershed, Gilan Mehdi Shafaghati 1, Ataullah Moslethjou 2 1- PhD student in Climatology, Kharazmi University, Tehran 2- Senior Expert of General Directorate of Natural Resources and Watershed Management of Gilan Province and University Lecturer Abstract: The occurrence of landslides in the northern regions of the country is increasing due to heavy rainfall, improper land use, and erosion-sensitive formations.
By comparing the landslide distribution map with the landslide zonation map using the Anbalagan method, it was determined that most of the landslides that occurred in this watershed were located in the high hazard zone, as provided by the model.
Table 3: Scoring of factors affecting the slope instability of the region Status Working unit Area (hectares) Slope geometry Relative height Land use Structural or Lithology Groundwater characteristics Hazard level score Soil science H1 353.
). Based on the results of Table No. 3, the percentage of surfaces of each of the zones, separately in each of the working units in the study area, has been classified according to the level of instability hazard from low to high.
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