华东师范大学学报(自然科学版) ›› 2016, Vol. 2016 ›› Issue (2): 112-127.doi: 10.3969/j.issn.1000-5641.2016.02.014

• 河口海岸学 • 上一篇    下一篇

长江口深水航道工程南导堤越堤通量时空变化数值研究

许鹏1，葛建忠1，丁平兴1，付桂2   

  1. 1.华东师范大学 河口海岸学国家重点实验室，上海200062；2.上海长江口航道管理局，上海200003
  • 收稿日期:2015-02-11 出版日期:2016-03-25 发布日期:2016-07-25
  • 通讯作者: 丁平兴，男，教授，博士生导师，研究方向为物理海洋学. E-mail:pxding@sklec.ecnu.edu.cn.
  • 作者简介:许鹏，男，硕士研究生，研究方向为物理海洋学. 
  • 基金资助:

    海洋公益性行业科研专项（2015015172）;

    长江口北支水沙盐输运模拟技术研究（2013BAB12B03）；

    国家自然科学基金（51320105005）

Numerical simulation about temporal and spatial variations of overtopping flow flux at the south leading jetty in the deep waterway project of the Changjiang Estuary

 XU  Peng1, GE  Jian-Zhong1, DING  Ping-Xing1, FU  Gui2   

  • Received:2015-02-11 Online:2016-03-25 Published:2016-07-25

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摘要： 在长江口北槽深水航道工程的背景下，以实测地形资料为基础，利用FVCOM，模拟南导堤越堤水流的时空变化.通过对越堤流过水断面通量的计算，分析工程前后越堤流的时空变化规律.导堤丁坝的修建，使得南北槽之间的水动力条件显著改变，工程之后，横向水流净通量指向北槽，且量值较大.越堤水流的沿程分布，以导堤转角为界，上半段逐渐减小，下半段逐渐增大，上半段净通量小于下半段；越堤流的净通量，在季节上变幅不大，在潮周期内呈周期性波动，净通量与潮位呈良好的线性相关.

关键词: 南导堤, 越堤水流, 时空变化, 数值模拟

Abstract: A numerical model based on the insitu measured topographic data was implemented, using the unstructuredgrid, threedimensional primitive equation, finitevolume coastal ocean model (FVCOM) including a dikegroyne module, for the study of temporal and spatial variations of overtopping flow at the south leading jetty constructed in the deep waterway channel. We investigated the temporal and spatial changes of overtopping flow by computing crosssection water flux before and after the project. The hydrodynamic condition around the north passage showed noticeable changes after the building of dikes and groynes. After the construction, respectively, net lateral current between the two channels points to the north passage with a relatively large amount of discharge. As estimated, spatially varying unit width net overtopping water flux had a significant feature, which was bounded at the corner, showed that the flux increased gradually at the upper half and decreased at the latter with a larger value. On a time scale the amplitude appeared no remarkable changes seasonally but on the other hand paced periodically in a tidal cycle. Moreover, the results showed a strong linear correlation between net water flux and tidal level.

Key words: the south leading jetty, overtopping flow, temporal and spatial variations, numerical simulation

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