泗礁岛周边海域风暴潮增减水特征浅析——以台风“灿鸿”为例

A brief characterization of water level fluctuation caused by storm surge around Sijiao Islands: Typhoon "Chan-Hom" as an example

基于2015年"灿鸿"台风暴潮期间的实测资料,应用三维数值模式(FVCOM),建立杭州湾周边海域台风暴潮数值模拟,分析风暴潮期间泗礁岛附近海域增减水过程以及时空分布,获得泗礁岛与大陆沿岸风暴潮增减水的差异性表现规律。结果显示:受台风"灿鸿"影响,泗礁附近海域出现最大增水约为0.6 m左右,最大减水0.4 m左右,同期芦潮港以及朱家尖附近海域最大增水均在1.0 m左右,明显高于泗礁附近海域增水。在相同程度的天气系统影响下,与大陆沿岸相比,泗礁海岛周边海域风暴潮增水相对较小。

Based on the observations during Typhoon storm surge “Chan-hom” in 2015, the numerical simulation of typhoon storm surge in waters around Hangzhou Bay was established by using the Three-Dimensional Primitive Equations Ocean Model-FVCOM. The process of water level fluctuation and the spatial and temporal distribution in waters near Sijiao Island during the storm surge was analyzed. The difference of storm surge water level fluctuation between Sijiao Island and the coast of the mainland was obtained. The results showed that under the influence of Typhoon Chan-hom, the maximum storm surge was about 0.6 m and the lowest water level was about 0.4 m in waters near Sijiao Island. At the same time, the maximum storm surge was about 1 m in waters near Luchao Harbor Station and in waters near Zhujiajian Station, It was obvious that the maximum storm surge in waters near the two stations are higher than that near Sijiao Island. Under the same degree of weather system influence, the water level fluctuation caused by storm surge in waters around Sijiao islands was less than that of the mainland coast.