Numerical Simulation of Storm Surge in the Submerged Radial Sandbars of the Southern Yellow Sea, China

Based on the Western Pacific storm surge and astronomical tide simulation system, this paper established simulation model of the features of affected storm surge in this area and give an analysis for the setup of the water level. It shows that there are 3 types of tropical cyclones which can have effects on this area: direct landing, northward after landing and sea northward. For landing north type and offshore activity type, the distribution of setup contours is near parallel to the coastline; for direct landing type, maximum surge obviously occurs at landing point, and setup reduces gradually from the centre to outside. The storm surge in the submerged radial sandbars has a close relation with sea-floor relief and the combination of passing time of typhoon and astronomic tide. It is necessary for storm surge prediction or simulation to consider topography, route and the time going through synthetically.