Zoning of the vulnerability of Ilam city against flood risk

Subject Areas : Environmental hazards and human settlements

Syed Jahangir Musavi Nasab ¹ , abbas malek hoseini ^{2 *} , Majid shams ³

1 - Ph.D. Candidate in Geography and Urban Planning, Malayer Branch, Islamic Azad University Malayer, Iran
2 - Associate Professor Department of Geography, Malayer Branch ,Islamic Azad University, Malayer ,Iran
3 - Professor Department of Geography, Malayer Branch ,Islamic Azad University, Malayer ,Iran

Received: 2023-08-07 Accepted : 2023-10-16 Published : 2025-02-19

Keywords: Vulnerability, flood risk, zoning, Ilam City,

Abstract :

Introduction: Floods are one of the hazards that have always had the possibility of occurring as a natural hazard for humans. Also, due to the increase in the occurrence of floods, especially in cities, and the occurrence of life, financial and environmental risks due to its increase, the zoning of flood-prone areas is of great importance. Flood zoning is one of the best methods for planning and identifying areas affected by floods. Research aim: The main goal of the current research, while identifying effective variables in flood risk zoning; Zoning is the degree of vulnerability of Ilam city against flood risk.Methodology: The approach of the current research was descriptive-analytical. In this research, at first, the influencing variables on flood vulnerability zoning have been identified based on various studies, then by using the AHP method and the opinions of 73 experts and weight experts related to each of the variables in the Export Choice software and finally, using the FAHP method and in the GIS software, maps related to the zoning of Ilam city's vulnerability to flood risk has been drawn.Studied Areas: The geographical territory of this research is Ilam city, the capital of Ilam province; which is located in the west and southwest of the country in terms of geographical location.Results: In the zoning of Ilam city's vulnerability to floods, out of 11 variables examined, 3 variables are distance from waterways with a weight of 0/244; The distance from the river with a weight of 0/126 and the slope direction with a weight of 1/102 are the most important variables and play a key role in zoning the vulnerability of Ilam city against floods. Also, a large area of Ilam city (1687 hectares) has a high potential of being vulnerable to flood risk, which is caused by the special topographical and geological conditions of this area.Conclusion: Examining the zoning status of flood risk vulnerability in Ilam city shows that the northwest, west, southwest and south parts of Ilam city are in a less vulnerable state than other areas of Ilam city. Also, most of the central, eastern, and northeastern parts of Ilam are in a state of high vulnerability. In the following, suggestions have been made to reduce the vulnerability of Ilam city against floods