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Urban Flood Risk Mapping with Coupling Storm and Sanitary Analysis Software (ASSA) and HEC-RAS Model, Case Study of Ladan Urban Watercourse, Mashhad, Iran | ||
| مجله پژوهش های خشکسالی و تغییراقلیم | ||
| دوره 3، شماره 4 - شماره پیاپی 12، اسفند 1404، صفحه 23-44 اصل مقاله (1.36 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22077/jdcr.2025.9632.1150 | ||
| نویسندگان | ||
| Reyhaneh Khashavarz1؛ Bahram Malek Mohammadi* 2؛ Mohammad Nik Sokhan3؛ Keivan Bina4 | ||
| 1Ph.D. Student, University of Tehran, Kish International Campus, Kish, Iran. | ||
| 2Faculty Member, Department of Environmental Engineering, University of Tehran, Tehran, Iran. | ||
| 3Professor, Faculty of Environmental, University of Tehran, Iran. | ||
| 4Assistant, Department of Civil Engineering, Engineering Faculty & Disaster Risk Reduction Research Group, Khayyam University, Mashhad, Iran. | ||
| چکیده | ||
| This study aimed to perform flood risk mapping of the Ladan watercourse in 9rd District of Mashhad city, Iran, through hydraulic and hydrological modeling. The analysis employed Storm and Sanitary Analysis (ASSA) and HEC-RAS 6.2 software. Rainfall–runoff modeling was based on a uniform rainfall pattern, while hydraulic simulations were conducted for return periods of 25, 50, and 100 years. Flood hazard zoning for the 100-year flood was prepared in accordance with Iranian Guideline for flood hazard mapping (Code 821), in which the product of flow depth and velocity (V×D) was considered as the flood hazard index. The findings revealed that the Ladan watercourse can convey floods with return periods of 25 and 50 years. However, during the 100-year flood, specifically, the initial 200 meters of the channel were identified as critical zones where overtopping and road inundation are likely to occur.The results provide a practical basis for prioritizing vulnerable zones | ||
| کلیدواژهها | ||
| Risk Mapping؛ Urban Flooding؛ ASSA Software؛ HEC-RAS؛ Rainfall-Runoff | ||
| مراجع | ||
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