Assessment on typhoon prevention capability of fishing port based on numerical model calculations

Abstract

Storm surge combined with strong wave induced by typhoon has led to significant losses of life and properties. In order to mitigate the impacts of typhoon disasters and provide early warning, the typhoon prevention capability of Shenjiamen fishing port was evaluated by using the coupled Advanced Circulation model (ADCIRC) and Simulating Waves Near shore model (SWAN). Various numerical experiments were carried out to determine the most dangerous typhoon path. The model result shows that the protection grade of seawall on the side of Xiaogan Island is relatively low. However seawall on the Lujiazhi Island is capable of withstanding category 17 typhoons. Through the comparison of external force on ship and holding force of anchor, the typhoon prevention ability of anchorage was also investigated. The protection grades of anchorage in Shenjiamen fishing port show significant spatial variation. The anchorage between Lujiazhi Island and Zhoushan Island has higher grades, reaching level 16. But the protection grade of anchorage does not exceed 13 at the gate of Shenjiamen fishing port and intersection area of waterway. This study could provide scientific basis for the protection of fishing port and the dispatch of fishing boats during typhoon.