Abstract
Zhejiang province is located at the southeast coast of China and vulnerable to typhoons generated in the northwest Pacific Ocean. An integrally coupled surge-wave model is developed and applied to the simulation of storm surge and wave induced by typhoon Lekima occurred in 2019. When considering wave-induced forces and using identical unstructured grid in coupled model, the model shows high accuracy and reproduces the typhoon process well. The distribution of maximum surge level shows great spatial differences along Zhejiang coast. Due to shelf geometry and shallow water effect, peak surge level rises significantly near Zhejiang coast. In addition, the peak surge levels on the right side of typhoon track are much higher than that on the left side. Contrary to characteristics of storm surge levels, significant wave height decreases rapidly near the Zhejiang coast due to shoaling, blocking of islands, and wave breaking.
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