The self-regulation process and its mechanism of channels’ bed changes in the Changjiang (Yangtze) Estuary in China

ZHANG Xiaohe LI Jiufa ZHU Wenwu CHENG Heqin CHEN Wei

张晓鹤, 李九发, 朱文武, 程和琴, 陈炜. 近期长江河口冲淤演变过程及自动调整机理研究[J]. 海洋学报英文版, 2015, 34(7): 123-130. doi: 10.1007/s13131-015-0699-3
引用本文: 张晓鹤, 李九发, 朱文武, 程和琴, 陈炜. 近期长江河口冲淤演变过程及自动调整机理研究[J]. 海洋学报英文版, 2015, 34(7): 123-130. doi: 10.1007/s13131-015-0699-3
ZHANG Xiaohe, LI Jiufa, ZHU Wenwu, CHENG Heqin, CHEN Wei. The self-regulation process and its mechanism of channels’ bed changes in the Changjiang (Yangtze) Estuary in China[J]. Acta Oceanologica Sinica, 2015, 34(7): 123-130. doi: 10.1007/s13131-015-0699-3
Citation: ZHANG Xiaohe, LI Jiufa, ZHU Wenwu, CHENG Heqin, CHEN Wei. The self-regulation process and its mechanism of channels’ bed changes in the Changjiang (Yangtze) Estuary in China[J]. Acta Oceanologica Sinica, 2015, 34(7): 123-130. doi: 10.1007/s13131-015-0699-3

近期长江河口冲淤演变过程及自动调整机理研究

doi: 10.1007/s13131-015-0699-3

The self-regulation process and its mechanism of channels’ bed changes in the Changjiang (Yangtze) Estuary in China

  • 摘要: 基于长江河口1997年以来数字地形图和近期水文泥沙实测资料, 分析研究了近期长江河口大量人工整治工程和流域水库工程建造的影响下的河口河道自动调整过程。结果表明:1997年以来的16年中河口段中上游河道微冲刷、拦门沙滩顶仍保持淤积外移、口门外侧近海域冲刷的态势略有增强, 而其影响原因与历史时期的自然因素影响为主略有差异, 近期人类高强度活动的影响贡献率增大。首先, 南支至南港和北港中上游河段河床发生普遍冲刷, 河床沙活动较活跃, 床面微地貌沙波发育更明显, 而口门外侧海域地形略有冲刷蚀退, 这些变化与流域来沙锐减有直接关系;北支、北港口门、南槽和北槽河道拦门沙河段呈淤积, 尤其北槽主航道的拦门沙河段6m水深浚深为12.5m后回淤量很大, 这些与拦门沙河道动力结构环境、河口和海域再悬浮泥沙补给有关;局部河段出现强冲和强淤现象, 与近期河口工程建造有关。所以, 长江河口近期正处在对自然因素变化和人类活动增强的自我缓慢地自动调整和适应过程之中。故然, 开展此类研究有其重要的现实意义。
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出版历程
  • 收稿日期:  2014-10-27
  • 修回日期:  2015-01-07

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