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The impacts of the large-scale hydraulic structures on tidal dynamics in open-type bay: numerical study in Jakarta Bay

机译：大型水工结构对开放式海湾潮汐动力学的影响：雅加达湾的数值研究

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摘要

The construction of a Giant Sea Wall (GSW) complex in Jakarta Bay has been proposed to protect Jakarta against flood in the Master Plan for National Capital Integrated Coastal Development (NCICD). However, these large-scale hydraulic structures could significantly change the tidal dynamics in Jakarta Bay. This research investigates the potential impacts of a GSW on the tidal dynamics, including tides, currents, and residual currents in Jakarta Bay using a validated numerical model (Finite Volume Coastal Ocean Model (FVCOM)). Results show that the bay is diurnal with a maximum tidal range of similar to 0.9 m. The flow is mainly in an east-west direction with a maximum depth-mean current speed of up to 0.3 ms(-1). The construction of a GSW would modulate the tidal dynamics by changing the bathymetry, tidal prism, wind effect, and tidal choking effect in the bay. The maximum tidal range would be slightly increased due to the reduced tidal prism of the bay and the increased tidal choking effect. The current would penetrate into the west reservoir through the gates and channels between the artificial islands, with peak speed jets appearing at the gates (similar to 0.3 ms(-1)), due to tidal choking. A similar peak current speed appears near the right wing of the GSW due to the pressure gradient would be created by the wing of the GSW. Closing the gates would mainly affect the currents inside the west reservoir. The residual current would be slightly increased after the construction of the GSW. An eddy would be formed at the bottom level near the right wing of the GSW. The direction of the residual current is landward instead of seaward at the surface level outside the GSW. The impact of wind on surface currents would be much reduced due to the decreased water surface area. Although this study is site specific, the findings may have a wider applicability to the impacts of large-scale hydraulic structures on tidal dynamics in open-type bays.
机译：在《国家首都沿海综合开发总计划》（NCICD）中，已提出在雅加达湾建造巨型海堤（GSW）综合体以保护雅加达免受洪水侵袭。但是，这些大型水力结构可能会显着改变雅加达湾的潮汐动力学。这项研究使用经过验证的数值模型（有限体积沿海海洋模型（FVCOM））调查了GSW对潮汐动力学的潜在影响，包括潮汐，洋流和雅加达湾的剩余流。结果表明，该海湾是昼间的，最大潮差接近0.9 m。流动主要在东西方向，最大深度平均电流速度高达0.3 ms（-1）。 GSW的建造将通过改变海湾的测深法，潮汐棱镜，风效应和潮汐窒息效应来调节潮汐动力。由于海湾的潮汐棱镜减小和潮汐阻塞效应的增加，最大潮汐范围将略有增加。潮流将通过人工岛之间的闸门和通道渗透到西部储层，由于潮汐阻塞，闸门处将出现峰值速度射流（类似于0.3 ms（-1））。由于GSW机翼会产生压力梯度，因此在GSW的右机翼附近会出现类似的峰值电流速度。关闭闸门将主要影响西部水库内部的水流。 GSW建造后，剩余电流将略有增加。 GSW右翼附近的底部将形成涡流。剩余电流的方向在GSW以外的地面水平上是向陆而不是向海。由于水表面积的减少，风对地表水流的影响将大大减少。尽管这项研究是针对特定地点的，但研究结果可能更适用于大型水力结构对开放式海湾潮汐动力学的影响。

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  • 来源
    《Ocean Dynamics》 |2018年第9期|1141-1154|共14页
  • 作者

    Rusdiansyah Alfi; Tang Yanling; He Zhiguo; Li Li; Ye Ying; Surya Martin Yahya;

  • 作者单位

    Zhejiang Univ, Inst Port Coastal & Offshore Engn, Ocean Coll, Hangzhou 310058, Zhejiang, Peoples R China;

    Zhejiang Univ, Inst Port Coastal & Offshore Engn, Ocean Coll, Hangzhou 310058, Zhejiang, Peoples R China;

    Zhejiang Univ, Inst Port Coastal & Offshore Engn, Ocean Coll, Hangzhou 310058, Zhejiang, Peoples R China;

    Zhejiang Univ, Inst Port Coastal & Offshore Engn, Ocean Coll, Hangzhou 310058, Zhejiang, Peoples R China;

    Zhejiang Univ, Inst Marine Geol & Resources, Ocean Coll, Hangzhou 310058, Zhejiang, Peoples R China;

    Zhejiang Univ, Inst Port Coastal & Offshore Engn, Ocean Coll, Hangzhou 310058, Zhejiang, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Jakarta Bay; Tide; Current; Residual current; Giant Sea Wall; Numerical modeling;

    机译：雅加达湾;潮汐;洋流;剩余洋流;巨型海堤;数值模拟;

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