A system shift in tidal choking due to the construction of Yangshan Harbour, Shanghai, China
A system shift in tidal choking due to the construction of Yangshan Harbour, Shanghai, China
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中国上海洋山港的建设导致潮汐阻塞的系统变化
DOI：
10.1016/j.ecss.2017.03.017
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发表时间：
2017-03
期刊：
影响因子：
--
通讯作者：
Dehai Song
中科院分区：
文献类型：
--
作者：
Wenyun Guo;Xiao Hua Wang;Pingxing Ding;Jianzhong Ge;Dehai Song
潮汐阻塞是由狭窄的通道引起的几何特征。中国上海洋山港的建设阻塞了三条主要航道，并强烈改变了当地的几何形状和地形。本研究利用海洋群落模式进行了9个数值试验，研究了该工程对潮汐特性的影响。结果表明，工程实施后，东口门发生了较强的潮汐阻塞，主要是由于伯努利定律和较长、较窄的几何形状所导致的射流诱发水位下降。较强的潮汐阻塞迫使更快的流量和更大的潮汐能通量在阻塞的通道，同时降低潮汐振幅的内港区（IHA）。河道冲刷减弱了阻塞作用，但进一步增大了潮能通量，河道筑坝降低了潮流传播方向背风侧的潮振幅，增大了迎风侧的潮振幅。大坝的修建也减小了两侧的潮流，同时在坝侧形成了两个强流斑块。该项目引起的潮汐特征变化在空间上很复杂，而水深的扰动增加了这种复杂性。洋山港的建设对IHA内的总潮汐能密度影响不大，但对潮汐能的空间分布影响明显。虽然这项研究是针对特定地点的，但研究结果可能适用于靠近公海的填海造地的潮汐动力学，例如中国南海岛屿的大规模填海。
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.Moreover, damming the channels decrease the tidal amplitude at the lee side of tidal propagating direction while increasing the amplitude on the stoss side. The dams also decrease the tidal current on both sides, and meanwhile develop two patches with stronger current aside the dam. The project induced changes in tidal characteristics are complex in space, and perturbations in bathymetry increase this complexity. Yangshan Harbour's construction induces little changes in the total tidal energy density in the IHA, but induces obvious changes in the spatial distribution of tidal energy. Although this study is site-specific, the findings may be applicable to tidal dynamics in land reclamation close to open seas, such as the dramatic reclamation of islands in the South China Sea.
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影响因子：
3.5
作者：
R. Vennell
通讯作者：
R. Vennell
DOI：
--
发表时间：
1967-07
期刊：
--
影响因子：
--
作者：
G. H. Keulegan
通讯作者：
G. H. Keulegan
影响因子：
2.8
作者：
K. Furukawa;E. Wolanski
通讯作者：
K. Furukawa;E. Wolanski
影响因子：
4.4
作者：
Pawlowicz, R;Beardsley, B;Lentz, S
通讯作者：
Lentz, S
影响因子：
56.9
作者：
E. Wolanski;W. Hamner
通讯作者：
E. Wolanski;W. Hamner