近60年来长江河口河势变化及其对水动力和盐水入侵的影响Ⅱ.水动力

鲍道阳; 朱建荣

doi:10.3969/j.issn.0253-4193.2017.02.001

近60年来长江河口河势变化及其对水动力和盐水入侵的影响Ⅱ.水动力

doi: 10.3969/j.issn.0253-4193.2017.02.001

华东师范大学河口海岸国家重点实验室, 上海 200062

基金项目: 国家自然科学基金项目（41476077）；上海市科委重点项目（14231200402）。

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出版历程
- 收稿日期: 2016-03-04
- 修回日期: 2016-05-07

The effects of river regime changes in the Changjiang Estuary on hydrodynamics and salinity intrusion in the past 60 years Ⅱ. Hydrodynamics

State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China

摘要

摘要: 本文基于本系列论文Ⅰ中数值化的长江河口20世纪50年代、70年代海图获得的岸线和水深资料，以及2012年水深实测资料，设置不同年代模式网格，考虑径流量、潮汐和风应力作用，建立长江河口水动力和盐水入侵三维数值模式，模拟和分析不同年代潮汐潮流、单宽余通量、分汊口水通量和分流比，及其河势变化对它们的影响。最大潮差在3个年代间的变化主要在北支区域，50年代至70年代，北支潮差减小，减小区域集中在北支中段，2012年相比70年代北支潮差增大。单宽水通量在50年代北港大于南港，北支下段向上游输运、上段量值较小，在70年代南港大于北港，北支下段量值较小、上段向下游，在2012年南北港水通量较为接近，北港稍大，整个北支水通量向上游。定量给出了50、70年代和2012年南北支、南北港大潮期间和小潮期间涨潮、落潮和净水量和分流比，结合河势变化分析了不同年代间的变化原因。
- 长江河口 /
- 河势变化 /
- 潮差 /
- 潮流 /
- 单宽余通量 /
- 分流比
Abstract: In this paper, with the digitized data of 1950s and 1970s and measured date of 2012, model grids were designed. Considering the effects of runoff, tide and wind stress, a 3D numerical model of Changjiang Estuary was built to simulate and analyze the tide, residual water transport, water flux and split ratio in bifurcations and the effects of river regime changes on them. The changes of the maximum tidal range occurs mainly in the North Branch, the tidal range of middle reaches of the North Branch decreased from 1950s to 1970s, and increased from 1970s to 2012.In 1950s, the residual water transport was greater in the North Channel than in the South Channel,transported toward the upper reaches in the lower reaches of the North Branch and its value was low in the upper reaches of the North Branch. In 1970s, the residual water transport was greater in the South Channel than in the North Channel, transported toward the lower reaches in the upper reaches of the North Branch and its value was low in the lower reaches of the North Branch. In 2012, the residual transport was equivalent in the North Channel and the South Channel,transported toward the upper reaches in the North Branch. The flood, ebb and net water split ratio during spring and neap tide in the North and South Branch, and the North and South Channel in the three times was given and the reason of change was analyzed based on the change of river regime.
- Changjiang Estuary /
- river regime change /
- tidal range /
- tidal current /
- residual transport /
- split ratio

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参考文献(13)

朱建荣, 胡松. 河口形状对河口环流和盐水入侵的影响[J]. 华东师范大学学报(自然科学版), 2003(2):68-73. Zhu Jianrong, Hu Song. Impact of the estuarine funnel shape on the estuarine circulation and saltwater intrusion[J]. Journal of East China Normal University (Natural Science), 2003(2):68-73.

Li Lu, Zhu Jianrong, Wu Hui, et al. A numerical study on water diversion ratio of the Changjiang (Yangtze) Estuary in dry season[J]. Chinese Journal of Oceanology and Limnology, 2010, 28(3):700-712.

Wu Hui, Zhu Jianrong, Choi B H. Links between saltwater intrusion and subtidal circulation in the Changjiang Estuary:A model-guided study[J]. Continental Shelf Research, 2010, 30(17):1891-1905.

Liu Gaofeng, Zhu Jianrong, Wang Yuanye, et al. Tripod measured residual currents and sediment flux:Impacts on the silting of the Deepwater Navigation Channel in the Changjiang Estuary[J]. Estuarine, Coastal and Shelf Science, 2011, 93(3):192-201.

王彪, 朱建荣, 李路. 长江河口涨落潮不对称性动力成因分析[J]. 海洋学报, 2011, 33(3):19-27. Wang Biao, Zhu Jianrong, Li Lu. A study on the dynamics of the asymmetry between flood and ebb in the Changjiang Estuary[J]. Haiyang Xuebao, 2011, 33(3):19-27.

宋永港, 朱建荣, 吴辉. 长江河口北支潮位与潮差的时空变化和机理[J]. 华东师范大学学报(自然科学版), 2011(6):10-19. Song Yonggang, Zhu Jianrong, Wu Hui. Spatial and temporal variations and mechanism of the tidal level and range in the North Branch of the Changjiang Estuary[J]. Journal of East China Normal University (Natural Science), 2011(6):10-19.

裘诚, 朱建荣. 长江河口北支上口不规则周期潮流的动力机制[J]. 海洋学报, 2012, 34(5):20-30. Qiu Cheng, Zhu Jianrong. Numerical analysis of tide current with irregular periods at the mouth of the upper North Branch in Changjiang River estuary[J]. Haiyang Xuebao, 2012, 34(5):20-30.

陈泾, 朱建荣. 长江河口北支新村沙围垦工程对盐水入侵的影响[J]. 华东师范大学学报(自然科学版), 2014(4):163-172. Chen Jing, Zhu Jianrong. Impact of the reclamation project of Xincunsha on the saltwater intrusion in the North Branch of the Changjiang Estuary[J]. Journal of East China Normal University (Natural science), 2014(4):163-172.

李林江, 朱建荣. 长江口南汇边滩围垦工程对流场和盐水入侵的影响[J]. 华东师范大学学报(自然科学版), 2015(4):154-162. Li Linjiang, Zhu Jianrong. Impacts of the reclamation project of Nanhui tidal flat on the currents and saltwater intrusion in the Changjiang Estuary[J]. Journal of East China Normal University (Natural science), 2015(4):154-162.

Yuan Rui, Zhu Jianrong. The effects of dredging on tidal range and saltwater intrusion in the Pearl River Estuary[J]. Journal of Coastal Research, 2015, 31(6):1357-1362.

赵士清. 长江口三维潮流的数值模拟[J]. 水利水运科学研究, 1985(1):23-31. Zhao Shiqing. Numerical simulation of three-dimensional tidal current in the Yangtze River Estuary[J]. Hydro-science and Engineering, 1985(1):23-31.

赵士清. 长江口南支河段潮流的数值计算[J]. 水利学报, 1983(1):56-60. Zhao Shiqing. Numerical simulation of tidal current in the North Branch of the Yangtze River estuary[J]. Shuili Xuebao, 1983(1):56-60.

朱建荣,鲍道阳. 近60年来长江河口河势变化及其对水动力和盐水入侵的影响Ⅰ.河势变化[J].海洋学报,2016,38(12):11-22. Zhu Jianrong, Bao Daoyang. The effects of river regime changes in the Changjiang Estuary on hydrodynamics and salinity intrusion in the past 60 years I. River regime changes[J]. Haiyang Xuebao, 2016,38(12):11-22.

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