Zoning of flood prone areas Using GIS (Case Study: Kamyaran city)

Flood is one of the most important and complex natural disasters that is the most frequent. Today's unrestricted population growth, land leveling, and occupation of rivers and marshes along with climatic and physiographic factors in major cities have led to urban floods. The purpose of this research is to map flood prone areas using GIS for Kamyaran basin. For flood risk zoning of 8 effective criteria according to the recommendations and guidance of experts of the city's natural resources and meteorological department including distance from rivers, distance from lakes, land use, area elevation, area slope, rainfall, temperature, distance from main uses Was. Using the Analytical Hierarchy Process (AHP) model the information layers in Expert Choise software were weighted and then compared by pairwise comparison. Finally, after incorporating layers in Arc Map software, the final model of zoning of flood prone areas of the city was classified into five classes from very high risk to very low risk areas. The results showed that 12.7% of the total area of the city was covered by high risk areas and about 15.2% by hazardous areas, which mainly included the central and northern parts of the city (Gavorud River margin) and provided these areas for flooding and flooding Put alert mode.