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Modeling the Yellow River sediment flux and its deposition patterns under climatological conditions

机译：气候条件下黄河泥沙通量及其沉积模式的模拟

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摘要

A numerical sediment transport model was embedded into a coupled wave-tide-circulation model to quantitatively estimate the suspended sediment fluxes (SSF) and distribution in different areas for the Yellow River derived sediment. The model is validated by comparing model simulated sediment deposition rates with those from observations. Simulated results show that the SSF of the Yellow River across two major sections (the Bohai Strait and the 37° N section) are highest during September and October, whereas for the 32° N section the flux is negligibly small (less than 0.1 kg/s). We demonstrate that the sediment flux is primarily driven by the buoyancy forcing of the Yellow River freshwater discharge and modulated by the wind-driven surface wave and circulation patterns in this region. The SSF across the Bohai Strait is about 30 % of the Yellow River discharge, while across the 37° N section it is 15.8 %. Therefore, about 70 % of the total discharged Yellow River sediments are deposited in the Bohai Sea, 14.1 % in the North Yellow Sea, and 13.9 % in the South Yellow Sea. There are two deposition branches in the Yellow Sea. The primary one is located off the eastern tip of the Shandong Peninsula and extends to the southwest off the coastline, which is consistent with the observed “Ω”-shape deposition pattern. This simulated tongue shape deposition pattern is isolated from the north by the strong resuspension off the eastern tip of Shandong Peninsula. The secondary branch extends to the middle of the South Yellow Sea and has been strengthened by resuspension process. The two deposition branches are separated by the wintertime Yellow Sea Warm Current in the bottom layer.
机译：将数值输沙模型嵌入耦合的潮汐-环流模型中，以定量估算黄河源性泥沙的悬浮泥沙通量（SSF）及其在不同区域的分布。通过将模拟的沉积物沉积速率与观测值进行比较，可以验证该模型的有效性。模拟结果表明，黄河的两个主要部分（渤海海峡和37°N段）的SSF在9月和10月最高，而对于32°N段，通量很小（小于0.1 kg / s）。我们证明了沉积物通量主要是由黄河淡水排放的浮力驱动的，并由该地区的风动力面波和环流模式调制的。渤海海峡的SSF约占黄河流量的30％，而北纬37°则为15.8％。因此，黄河排放的总沉积物约有70％沉积在渤海中，北黄海沉积率为14.1％，南黄海沉积率为13.9％。黄海有两个沉积分支。一次沉积位于山东半岛的东端，并延伸至海岸线西南部，与观察到的“Ω”形沉积模式一致。这种模拟的舌头形状沉积模式是通过山东半岛东端的强烈重悬而与北方隔离的。次要分支延伸到南黄海中部，并通过重悬过程得到了加强。两个沉积分支被底层的冬季黄海暖流隔开。

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  • 来源
    《Ocean Dynamics》 |2013年第6期|709-722|共14页
  • 作者

    Jing Lu; Fangli Qiao; Xiaohua Wang; Yong Teng; Kyung Tae Jung; Yanguang Liu;

  • 作者单位

    First Institute of Oceanography State Oceanic Administration">(1);

    First Institute of Oceanography State Oceanic Administration">(1);

    School of Physical Environmental and Mathematical Sciences University of New South Wales at Australian Defence Force Academy">(2);

    First Institute of Oceanography State Oceanic Administration">(1);

    Korea Institute of Ocean Science and Technology (KIOST)">(3);

    First Institute of Oceanography State Oceanic Administration">(1);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sediment dynamics; Deposition; Resuspension; Vertical mixing; Yellow River;

    机译：泥沙动力学;沉积重悬;垂直混合;黄河;

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