黄河钓口河口行水期泥沙输运过程的三维数值模拟

邢国攀, 宋振杰, 张勇, 吴晓, 毕乃双, 王厚杰. 黄河钓口河口行水期泥沙输运过程的三维数值模拟[J]. 海洋地质与第四纪地质, 2016, 36(5): 21-34. doi: 10.16562/j.cnki.0256-1492.2016.05.003
引用本文: 邢国攀, 宋振杰, 张勇, 吴晓, 毕乃双, 王厚杰. 黄河钓口河口行水期泥沙输运过程的三维数值模拟[J]. 海洋地质与第四纪地质, 2016, 36(5): 21-34. doi: 10.16562/j.cnki.0256-1492.2016.05.003
XING Guopan, SONG Zhenjie, ZHANG Yong, WU Xiao, BI Naishuang, WANG Houjie. 3-DIMENSIONAL SIMULATION OF SUSPENDED SEDIMENT TRANSPORT OFF THE DIAOKOU RIVER MOUTH, THE YELLOW RIVER[J]. Marine Geology & Quaternary Geology, 2016, 36(5): 21-34. doi: 10.16562/j.cnki.0256-1492.2016.05.003
Citation: XING Guopan, SONG Zhenjie, ZHANG Yong, WU Xiao, BI Naishuang, WANG Houjie. 3-DIMENSIONAL SIMULATION OF SUSPENDED SEDIMENT TRANSPORT OFF THE DIAOKOU RIVER MOUTH, THE YELLOW RIVER[J]. Marine Geology & Quaternary Geology, 2016, 36(5): 21-34. doi: 10.16562/j.cnki.0256-1492.2016.05.003

黄河钓口河口行水期泥沙输运过程的三维数值模拟

  • 基金项目:

    国家自然科学基金项目(41376096,41525021,41376079);中国地质调查项目(GZH200900501)

详细信息
    作者简介: 邢国攀(1988-),男,博士生,海洋地质专业,E-mail:xingguopan999@163.com
  • 中图分类号: P736.21

3-DIMENSIONAL SIMULATION OF SUSPENDED SEDIMENT TRANSPORT OFF THE DIAOKOU RIVER MOUTH, THE YELLOW RIVER

  • 由于钓口流路行水时期普遍缺乏对河口和近海的系统观测,基于1976年黄河三角洲实测水深数据和汛期水沙数据,采用EFDC三维数值模式对钓口河口泥沙沉积动力过程进行了数值模拟研究。模型结果表明,钓口河口的羽状流和异重流的时空分布具有显著的潮周期变化特征。受与岸线平行的涨落潮流作用,表层羽状流的侧向摆动幅度较大,河口羽状流输沙主要平行于岸线方向,跨等深线的泥沙输运受到限制。汛期黄河入海的高浓度泥沙在钓口河口形成潜没的异重流,在底层沿河口轴线向北输运泥沙至三角洲前缘区域,泥沙输运通量比表层羽状流的输送通量高出一个数量级,且随着离岸距离的增大而呈指数形式快速衰减。随着水深增大,单宽泥沙通量的衰减速率逐渐减小。计算结果显示,由于汛期高浓度泥沙入海,钓口河口的异重流稳定存在,导致约75%的入海泥沙沉积在10 m水深以浅的区域,25%的入海泥沙淤积在三角洲前缘外侧,异重流过程对汛期钓口河口泥沙向深水区输运和沉积具有控制作用。数值模拟结果与前人根据水深变化揭示的三角洲冲淤分布格局一致,与钻孔的沉积记录基本吻合。
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收稿日期:  2016-04-11
修回日期:  2016-06-23

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