Urban Flood Hazard Zoning Using Multicriteria Decision Analysis (Emam Ali town, Mashhad city)

Subject Areas : Environmental Risk Analysis

Mohammad  Rostami Khalaj ¹ (Assistant Professor, Soil Conservation and Watershed Management Department, Agricultural and Natural Resources Research Center of Khorasan Razavi, AREEO, Mashhad, Iran *(Corresponding Authours).)
Dana  Hesami ² (M.Sc. Student, University of Tehran.)
Hossein  salmani ³ (PhD Student, Faculty of Natural Resources, University of Gorgan, I.R. Iran.)
Teymor  Tymoriyan ⁴ (PhD Student, Faculty of Natural Resources, University of Tehran, I.R. Iran)

Received: 2016-10-27 Accepted : 2017-08-02 Published : 2020-01-21

Keywords: Hazard Potential Map, urban flood, Imam Ali town Mashhad city, multicriteria decision analysis,

Abstract :

Background and Objective: Inundation in urban areas due to dens storm has created many problems for all cities thorough the world. Urban flood hazard zoning may provide useful information for dealing with contingency and alleviating risk and loss of life and property.Therefore, in order to manage urban areas, take relief measures and prioritize areas to solve the problem of floods, the areas that are most affected should be identified. Method: Vulnerability of urban areas often includes multicriteria that are associated with flooding. One of the methods that are sufficiently accurate and available which can identify flood hazard zoning, is using multicriteria decision analysis (MCDA) that in this study was used to determine the potential of flood risk in urban area. Six variables include: distance to the main channel, slopes, land use, drainage density, slope of the main channel and elevation was used. After determining paired comparison matrix, layers weight was determined by using the knowledge of experts and experts in the region and finally the map of urban flood hazard were identified. Findings: Hazard Potential Map showed that 8.2% of the areas near to the outlet and located around the main channel are at highest hazard potential. Discussion and Conclusion: The results and field investigation showed multicriteria decision analysis is accurate and appropriate method for urban flood hazard zoning and using this method can identify areas with a greater flooding risk.

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