The evolution characteristics of main waterways and their control mechanism in the radial sand ridges of the southern Yellow Sea

CHEN Kefeng; ZHENG Jinhai; ZHANG Chi; WANG Nairui; ZHOU Chunyan

doi:10.1007/s13131-017-1042-y

辐射沙脊主要水道的演变特征及其水动力机制研究

doi: 10.1007/s13131-017-1042-y

1.
水文水资源及水利工程科学国家重点实验室(南京水利科学研究院), 南京, 210029
2.
河海大学, 南京, 210098

基金项目: The National Science Fund for Distinguished Young Scholars of China under contract No.5142590; the Nanjing Hydraulic Research Institute Foundation of China under contract No.Y215011.

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- 收稿日期: 2016-06-28
- 修回日期: 2016-09-18

The evolution characteristics of main waterways and their control mechanism in the radial sand ridges of the southern Yellow Sea

1.
State Key Laboratory of Hydrology-water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China
2.
College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China

摘要

摘要: 近四十年来的水下地形资料对比显示：南黄海辐射沙洲区水道普遍存在逐渐向南偏移的趋势（西洋主槽冲深、南延，南翼烂沙洋水道、小庙洪水道向南逼进）。有关辐射沙洲整体南移的原因及机理虽有诸多猜想，但至今没有统一可靠的认识，这种趋势性过程的驱动力成为辐射沙洲区海岸冲淤动态研究及港口建设过程中亟待解决的问题。在恢复黄河北归以来苏北黄河三角洲海岸不同发育阶段的岸线位置和水下地形的基础之上，通过所建立的潮波数学模型，研究了在苏北黄河三角洲不同演变阶段南黄海潮波系统的特征及水动力变化。研究表明，随着岸线后退和水下三角洲的夷平，辐射沙洲地区潮差不断增大；水动力不断加强，而且加强的区域逐渐向南偏移，这种大范围区域性水动力主轴的向南偏移就有可能是导致辐射沙洲整体南移的主导因素之一。
- 辐射沙洲 /
- 废黄河三角洲 /
- 岸线变迁 /
- 水动力 /
- 数值模拟
Abstract: The comparison of the underwater topographic data in recent four decades shows that main waterways of the radial sand ridges area in the southern Yellow Sea tend to gradually migrate southward (scour depth and southward extension of the main channels in Xiyang, southward approach of Lanshayang Waterway and Xiaomiaohong Waterway on South Flank). Although there are various hypotheses about the cause and mechanism of the overall southward migration of the radial sand ridges, no universal and reliable understanding has been obtained so far. The mechanism of this process becomes a challenging problem which serves a key issue in the morphodynamics of the radial sand ridges and the harbor construction in this area. On the basis of the shoreline positions and underwater terrains at different development stages of the Huanghe Delta coast in northern Jiangsu Province, China since the northward return of the Huanghe River and flowed into the Bohai Sea, combined with the tidal wave numerical simulation study, the characteristics and hydrodynamic changes of the tidal wave system in the southern Yellow Sea at different evolution stages are investigated. It is shown that due to the shoreline retreat and the erosion of underwater delta, tidal current velocity is enhanced, and the enhanced area gradually migrates southward. It is revealed that this southward migration of a large-scale regional hydrodynamic axis is possibly a dominant mechanism leading to the overall southward migration of the radial sand ridges.
- radial sand ridges /
- abandoned Huanghe Delta /
- shoreline change /
- hydrodynamics /
- numerical simulation

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参考文献(33)

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文章访问数: 994
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辐射沙脊主要水道的演变特征及其水动力机制研究

doi: 10.1007/s13131-017-1042-y

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The evolution characteristics of main waterways and their control mechanism in the radial sand ridges of the southern Yellow Sea

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