A Survey of Landslides in Central Zagros using Entropy Model Case Study (Aradal-Naghan Region)

Today, cities around the world are exposed to natural hazards for many reasons. These risks come with many injuries that require immediate and preventive actions. The occurrence of landslides and hazards has made it necessary to identify and prioritize these sensitive areas. Ardal-Naghan region is located in the southwest of Chaharmahal-Bakhtiari province. The method of this research is descriptive-analytic. In the descriptive section, using the documentary studies and in the analytical section, identifying the effective parameters in the zoning of geomorphic hazards and integrating it with spatial analysis in the GIS of the vulnerable zones in the study area were determined. In this study, firstly, effective factors in hazard zonation were identified. After examining satellite images, geological maps and field studies, effective factors were studied using entropy model. The aim of this research is to determine the zoning of landslide hazard in Ardal-Naghan region using the entropy model in landslide occurrence by identifying effective factors such as slope, direction, distance from fault, distance from the waterway, elevation, geology and so on. According to the entropy model, the results show that 23 percent of landslides are in low-risk area, 25 percent are in moderate risk, and 52 percent of landslides are in high-risk area. This shows that in landslide zoning, the regional entropy model possesses the accuracy and validity.