上海黄浦江及沿海高分辨率非结构网格风暴潮数值模型-海洋预报

上海黄浦江及沿海高分辨率非结构网格风暴潮数值模型

单位：1. 河海大学环境学院南京 210098;
2. 上海市水务局上海 200232

分类号：研究与分析

出版年·卷·期（页码）：2010·2010·第二期（38-43）

摘要：

为提高复杂区域内风暴潮的预测能力,以上海黄浦江、长江口和沿岸近海为研究对象,构建了基于浅水方程的风暴潮模型。模型运用HLLC格式计算通量,具有高空间分辨率,能够模拟风暴潮、天文潮、洪水等多重因素作用下潮水位过程变化。它采用了非结构的四边形和三角形混合网格,适合应用于跨尺度河渠和河口等区域潮汐交互作用的分析模拟。为了验证模型,开展了0012号派比安台风和0509号麦莎台风影响下的潮汐变化过程计算。结果表明,该模型能够分析天文潮和台风组合作用下的潮水位变化,能够满足风暴潮预报要求。

To improve the ability of forecast in complex area,we propose a storm surge model based on shallow water equations in the Huangpu River,yangtze delta and coastal ocean.The HLLC scheme is applied in the model to calculate the interface flux with high-resolution in space and can simulate the process of tidal level caused by storm surge,astronomic tide,flood and so on.The model which uses the unstructured meshes consisting of triangle and quadrilateral is suitable for the analysis and prediction of tidal interactive effects in the area from channel-scale to basin scale of estuary.To validate themodel,we calculate the process of tide change induced by typhoon 0012 and 0509.The results show that the model can analyze the change of tidal level influenced by astronomic tide and typhoon together and fit for the request of storm surge forecast.

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