Numerical Simulation of the Flood and Inundation Caused by Typhoon Noru Downstream from the Vu Gia-Thu Bon River Basin

Typhoon Noru (2022) was a historic storm that caused significant damage to the central region of Vietnam. has strong winds and torrential rainfall in Da Nang, Quang Nam, Ngai. Nam Province saw many trees power lines fall, areas were flooded. The Nang government reported typhoon toppled trees, blew rooftops three houses, damaged walls several schools, outage at some 3200 substations. It resulted widespread flooding coastal downstream from Vu Gia-Thu Bon River river basin. This study evaluates impact Noru. results show that: (1) numerical simulation applied re-analyze offshore meteorological field with Coupled Ocean–Atmosphere–Wave–Sediment Transport (COAWST) model as an input for 2D wave propagation hydraulic models; (2) couples 1D models MIKE FLOOD simulate flood inundation by area. calibration validation model, hydrodynamic reasonably good, Nash coefficient ranging 0.84 0.96 percent bias (BIAS) −0.9% 7.5%. showed two districts: Thang Binh province Hoa Vang province. practical significance these is they provide valuable support warning systems troubleshooting efforts related typhoons.