Assessing tropical cyclone compound flood risk using hydrodynamic modelling: a case study in Haikou City, China

Abstract. The co-occurrence of storm tide and rainstorm during tropical cyclones (TCs) can lead to compound flooding in low-lying coastal regions. assessment TC flood risk provide vital insight for research on prevention. This study investigates by constructing a surge model overland using Delft3D Flexible Mesh (DFM), illustrating the serious consequences from perspective tide. Based probability distribution tide, this regards TC1415 as 100-year event, TC6311 50-year TC8616 25-year TC8007 10-year TC7109 5-year event. results indicate that area is major floodplain, primarily due with inundation severity positively correlated height For depth above 1.0 m increases approximately 2.5 times when compared Comparing single-driven (storm inundation) hazards shows simply accumulating every hazard define may cause underestimation.