نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری مهندسی محیط زیست، پردیس بین المللی دانشگاه تهران، کیش
2 عضو هیات علمی دانشکده مهندسی محیط زیست دانشگاه تهران
3 استادیار گروه عمران دانشگاه خیام
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
موضوعات
)