华东师范大学学报(自然科学版) ›› 2018, Vol. 2018 ›› Issue (2): 170-180.doi: 10.3969/j.issn.1000-5641.2018.02.018

• 河口海岸学 • 上一篇    

长江口洪季南北槽落潮分流分沙比观测研究

杨万伦, 道付海, 栾华龙, 葛建忠, 丁平兴   

  1. 华东师范大学 河口海岸学国家重点实验室, 上海 200062
  • 收稿日期:2017-02-23 出版日期:2018-03-25 发布日期:2018-03-22
  • 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. E-mail:pxding@sklec.ecnu.edu.cn
  • 作者简介:杨万伦,男,硕士研究生,研究方向为河口海岸泥沙运动力学及其工程应用.E-mail:312695238@qq.com.
  • 基金资助:
    国家自然科学基金（41476076）

Study of the ebb sediment diversion ratios during wet season in the South and North Passage, Changjiang Estuary

YANG Wan-lun, DAO Fu-hai, LUAN Hua-long, GE Jian-zhong, DING Ping-xing   

  1. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
  • Received:2017-02-23 Online:2018-03-25 Published:2018-03-22

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摘要： 基于2015年洪季水文观测资料，分析了长江口洪季北槽大小潮期间落潮分流和分沙特征，及其差异和原因.观测结果显示：北槽大潮和小潮落潮分流比均值分别为41.9%和43.1%，大潮和小潮落潮分沙比均值分别为35.1%和39.0%，大小潮差异较小，故大潮落潮分沙情况可近似代表当月落潮分沙情况.大小潮期间北槽落潮分沙比与南北槽断面平均流速之比、断面平均含沙量之比和断面面积之比有关，而观测结果显示大小潮周期内南北槽断面面积比值、断面含沙量比值、断面流速比值均无较大差异.因此，大小潮北槽落潮分流和分沙情况差异不大.

关键词: 长江口, 洪季, 大小潮, 落潮分沙比

Abstract: This study investigates the characteristics of the ebb water and sediment diversion ratios during wet season in the North Passage, Changjiang Estuary and the reasons for the differences within neap-spring tidal cycles based on field measurements. The results of the measurements indicate that the averaged ebb flow diversion ratios of the North Passage in spring and neap tide are 41.9% and 43.1%, respectively, while the averaged ebb sediment diversion ratios of the North Passage in spring and neap tide are 35.1% and 39%,the averaged ebb sediment diversion ratios of the North Passage in spring can approximate representatively ebb sediment diversion status. The ebb sediment diversion ratio of the North Passage is dependent on the ratios of mean flow velocity, suspended sediment concentration and section areas of the North and South Passage. And these parameters show minor changes within neap-spring tidal cycles. Therefore, it can be concluded that the differences of ebb flow and sediment diversions of the North Passage within neap-spring tidal cycles are limited.

Key words: Changjiang Estuary, wet season, neap-spring tide, ebb sediment diversion ratio

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