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首页> 外文期刊>Estuarine Coastal and Shelf Science >A system shift in tidal choking due to the construction of Yangshan Harbour, Shanghai, China
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A system shift in tidal choking due to the construction of Yangshan Harbour, Shanghai, China

机译:中国上海洋山港的建设导致潮汐窒息的系统转移

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摘要

Tidal choking is a geometric feature caused by a narrowed channel. Construction of the Yangshan Harbour, Shanghai, China obstructed three key channels and intensively changed the local geometry and topography. In this study nine numerical experiments based on the Finite-Volume Community Ocean Model are conducted to study the project's influence on tidal characteristics. Results show that stronger tidal choking happened at the East Entrance after project, mainly due to the jet induced water-level drop forced by Bernoulli law and the longer and narrower geometry. The stronger tidal choking forces a faster flow and larger tidal energy flux at the choked channel while reducing the tidal amplitude in the Inner Harbour Area (IHA). The scouring on this channel reduces the choking effect but further enlarges tidal energy flux.
机译:潮汐阻塞是通道狭窄导致的几何特征。中国上海洋山港的建设阻碍了三个主要渠道,并强烈改变了当地的几何形状和地形。在这项研究中,基于有限体积社区海洋模型进行了九次数值实验,以研究该项目对潮汐特征的影响。结果表明,工程结束后东口发生了更强的潮汐阻塞,这主要是由于伯努利定律迫使喷流引起的水位下降以及几何形状的变长和变窄。较强的潮汐阻塞使阻塞通道的水流更快,潮汐能量通量更大,同时减小了内港区(IHA)的潮汐幅度。在该通道上进行冲刷可减少阻塞效应,但会进一步增大潮汐能通量。

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