风拖曳力系数和曼宁系数对风暴潮流模拟的影响

发布时间：2018-05-30 23:00

本文选题：台风 + 风暴潮流　；参考：《人民长江》2017年18期

【摘要】：利用0205号威马逊台风期间实测风暴增水和风暴潮流数据,采用NCEP FNL和台风模型风场的融合风场作为驱动项,建立了覆盖东海的三维风暴潮流数值模型,研究风拖曳力系数和曼宁系数对风暴增水和风暴潮流的影响。计算结果表明:(1)风拖曳力系数取值应考虑随风速变化。表层风暴潮流受风拖曳力系数影响较大,中层和底层风暴潮流基本不受影响。(2)风暴潮流结构在一定程度上取决于曼宁系数;曼宁系数对中层和底层风暴潮流影响大于表层,曼宁系数越大,底摩擦阻力越大,风暴潮流垂向分层越明显。(3)风暴增水和风暴潮流对曼宁系数的响应不同,建立模型时,应同时率定风暴增水和风暴潮流。
[Abstract]:Based on the observed storm surge and storm tidal current data during typhoon 0205, a 3-D storm tidal current numerical model covering the East China Sea is established by using the combined wind field of NCEP FNL and typhoon model as the driving term. The effects of wind drag coefficient and Manning coefficient on storm water increase and storm tidal current are studied. The results show that the wind drag coefficient should be taken into account with the wind speed. The surface storm tidal current is greatly affected by wind drag force coefficient, and the middle and bottom storm tidal currents are almost unaffected. The storm tidal current structure depends on the Manning coefficient to some extent, and the influence of the Manning coefficient on the middle and bottom storm tidal current is greater than that on the surface layer. The larger the Manning coefficient is, the greater the bottom friction resistance is, and the more obvious the vertical stratification of storm tidal current is.) the response of storm water increase and storm tide to Manning coefficient is different. When establishing the model, the storm water increase and storm tide should be determined at the same time.
【作者单位】：浙江环科环境咨询有限公司;华东师范大学河口海岸学国家重点实验室;国家海洋局第二海洋研究所;
【分类号】：P731.23;P732.3

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