Characteristics of Storm Surge Due to Typical Typhoon Tracks in Coastal Areas of the South Yellow Sea

Abstract

Tropical storm surges often devastate the highly populated coastal regions in south Yellow Sea, which cause serious economic loss and human injury during the past decades. The ADCIRC shallow-water circulation model is used to investigate the surge heights in the coastal area in response to typhoons attack in different tracks. Dynamic Holland model is applied to generate the required wind field for typhoons using the best track data from CMA. Moreover, coupled water level of the astronomical tide level and storm surge for boundary conditions are derived from the large model, Northwest Pacific Ocean tide-surge Model. The results show that for typhoons moving northward after landfall and typhoons active in offshore areas, storm surges isoclines were nearly parallel to the coastline in coastal area of the south Yellow Sea. While for typhoon making straight landfall, the contour map of the peak surge takes landfall point as the center, and reduces gradually to both sides. It also indicates that storm surges in the Radial Sand Ridges are larger than in other waters. The conclusions would be useful for identifying disaster management issues by considering the degree of devastation along the coast area of the south Yellow Sea.