长江口台风期间波致增水空间分布特征研究-海洋预报

长江口台风期间波致增水空间分布特征研究

单位：1. 河海大学海岸灾害及防护教育部重点实验室, 江苏南京 210098;
2. 河海大学港口、海岸与近海工程学院, 江苏南京 210098;
3. 浙江水利科学研究院, 浙江杭州 310020

分类号：P731.22

出版年·卷·期（页码）：2021·38·第六期（12-20）

摘要：

基于ADCIRC+SWAN模式，构建了双重嵌套的风暴潮和台风浪耦合模型。大模型范围涵括渤海、黄海和大部分东海区域，为小模型提供边界条件；小模型计算区域上起大通，下至长江口外30m等深线，精细刻画长江口及邻近海域岸线地形。通过比较7场典型台风风暴潮过程中的计算和实测潮位对模型进行验证。使用该模型研究台风过程中长江口的波致增水特征，通过比较7场台风过程中长江口的波致增水特征，剖析了长江口波致增水的量级及空间分布特征，为长江口沿岸的防洪减灾预警预报工作提供参考。

Based on the ADCIRC and SWAN model, a double-nesting coupled model is setup to simulate storm surge and typhoon wave. The outer model covers the Bohai Sea, the Yellow Sea and most part of the East China Sea, providing boundary conditions for the inner model. The computational domain of the inner model starts from Datong station to the 30 m isobath outside the Yangtze River estuary, which finely depicts the topography of the Yangtze River estuary and its adjacent waters. The model is validated by comparing the simulated storm surge of 7 typical typhoon processes and observed tidal levels. The model is used to study the characteristics of waveinduced setup in the Yangtze River estuary during typhoon processes. By comparing the spatial pattern of waveinduced setup in the Yangtze River estuary during the 7 typhoons processes, the magnitude and spatial distribution characteristics of the wave-induced setup in the Yangtze River estuary are analyzed. The results found in this paper provide reference for the coastal flood prevention and disaster reduction along the Yangtze River estuary.

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