3D Numerical Simulation of Storm Surge in the Changjiang Estuary and the Hangzhou Bay(Chinese)
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摘要: 基于改进的河口海岸和海洋三维数值模式ECOM-si，加入台风模型气压场和模型风场，同时考虑径流、天文潮与风暴潮耦合作用，数值模拟了TC9711（Winnie），TC0012（Prapiroon）和TC0014（Saomai）三个台风期间长江口和杭州湾的水位过程.与观测资料比较，模式较好地再现了台风期间的水位过程，采用Fujita（藤田）气压场公式计算的结果比FujitaTakahashi（藤田高桥）气压场公式下的计算结果更符合实测值，并在上述3个台风期间计算水位值与观测值的均方误差分别为42.5 cm，41.7 cm，35.5 cm.Abstract: The study was based on the improved 3-D estuarine, coastal and oceanic model ECOM-si, in which a model of sea surface pressure and wind fields was embedded. By coupling the action of runoff, astronomic tide and storm surge, water level process in the Changjiang estuary and the Hangzhou Bay during three typhoons(No. 9711(Winnie), No. 0012(Prapiroon) and No. 0014(Saomai)) were simulated in this paper. The model revealed well the water level process during three typhoons. The simulated storm surges by Fujita pressure formula(formulaⅡ) were better fitting the observed than those by FujitaTakahashi pressure formula(formulaⅠ). The mean square errors between the simulated and the observed water level by formulaⅡduring three typhoons were 42.5 cm, 41.7 cm and 35.5 cm, respectively.
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