Analysis of hydrodynamic features of the North Passage in the turbidity maximum, Changjiang Estuary

Jiang Jie; He Qing; Zhu Lei; Lin Jianliang

doi:10.3969/j.issn.0253-4193.2019.01.002

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Jiang Jie, He Qing, Zhu Lei, Lin Jianliang. Analysis of hydrodynamic features of the North Passage in the turbidity maximum, Changjiang Estuary[J]. Haiyang Xuebao, 2019, 41(1): 11-20. doi: 10.3969/j.issn.0253-4193.2019.01.002

Citation:

Jiang Jie, He Qing, Zhu Lei, Lin Jianliang. Analysis of hydrodynamic features of the North Passage in the turbidity maximum, Changjiang Estuary[J]. Haiyang Xuebao, 2019, 41(1): 11-20. doi: 10.3969/j.issn.0253-4193.2019.01.002

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Analysis of hydrodynamic features of the North Passage in the turbidity maximum, Changjiang Estuary

doi: 10.3969/j.issn.0253-4193.2019.01.002

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

Received Date: 2017-12-06
Rev Recd Date: 2018-04-27

Abstract

Abstract

Based on the observations of full depth in the North Passage (NP) during the flood season in 2015, an analysis of horizontal flow, residual flow structure and boundary layer features in the middle-lower sections of NP was further conducted. The research reveals that the tidal current vectors during spring tide shows clear vertical variations. A lateral water transport to the north of the channel appears in the study site. The lateral flow velocity (depth-averaged) varies from -0.10 m/s to 0.39 m/s during spring tide while -0.13 m/s to 0.25 m/s during neap tide. Lateral advection plays an important role in the longitudinal mass transport and hydrodynamics. There is a significant variation in the residual flow vertical distribution, with an approximately zero value at the bottom. The residual flow is stronger in the neap tide. Suspended bed sediments can be seen as a supply for the turbidity maximum. There are great errors in the logarithmic velocity fitting law based on the traditional "six points" method. To gain the precise bottom boundary layer parameters, we need to focus on the high-resolution velocity profile in the 1 m water column above the bed.
- North Passage,
- lateral flow,
- residual flow,
- bottom boundary layer

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References(20)

References

沈焕庭, 潘定安. 长江河口最大浑浊带[M]. 北京:海洋出版社, 2001:39-40. Shen Huanting, Pan Dingan. Turbidity Maximum in the Changjiang Estuary[M]. Beijing:China Ocean Press, 2001:39-40.

Glangeaud L. Transport et sedimentation clans1'estuairc et a l'embouchure de La Gironde[J]. Bulletin of Geological Society of France, 1938, 8:599-630.

Festa J F, Hansen D V. Turbidity maxima in partially mixed estuaries:a two-dimensional numerical model[J]. Estuarine and Coastal Marine Science, 1978, 7(4):347-359.

Allen G P, Salomon J C, Bassoullet P, et al. Effects of tides on mixing and suspended sediment transport in macrotidal estuaries[J]. Sedimentary Geology, 1980, 26(1/3):69-90.

沈焕庭, 郭成涛, 朱慧芳, 等. 长江河口最大浑浊带的变化规律及成因探讨[M]. 北京:科学出版社, 1984:76-89. Shen Huanting, Guo Chengtao, Zhu Huifang, et al. Discussion on Variations and Formation of the Turbidity Maximum in the Changjiang Estuary[M]. Beijing:Science Press, 1984:76-89.

田向平. 珠江河口伶仃洋最大混浊带研究[J]. 热带海洋, 1986, 5(2):27-35. Tian Xiangping. A study on turbidity maximum in Lingdingyang Estuary of the Pearl River[J]. Tropical Oceanography, 1986, 5(2):27-35.

时钟, 陈伟民. 长江口北槽最大浑浊带泥沙过程[J]. 泥沙研究, 2000(1):28-39. Shi Zhong, Chen Weiming. Fine sediment transport in turbidity maximum at the North Passage of the Changjiang Estuary[J]. Journal of Sediment Research, 2000(1):28-39.

Jiang Chenjuan, de Swart H E, Li Jiufa, et al. Mechanisms of along-channel sediment transport in the North Passage of the Yangtze Estuary and their response to large-scale interventions[J]. Ocean Dynamics, 2013, 63(2/3):283-305.

Li Xiangyu, Zhu Jianrong, Yuan Rui, et al. Sediment trapping in the Changjiang Estuary:observations in the North Passage over a spring-neap tidal cycle[J]. Estuarine, Coastal and Shelf Science, 2016, 177:8-19.

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.

Song Dehai, Wang Xiaohua, Cao Zhenyi, et al. Suspended sediment transport in the Deepwater Navigation Channel, Yangtze River Estuary, China, in the dry season 2009:1. Observations over spring and neap tidal cycles[J]. Journal of Geophysical Research:Oceans, 2013, 118(10):5555-5567.

沈焕庭, 吴加学, 刘新成, 等. 长江河口物质通量[M]. 北京:海洋出版社, 2001:11-153. Shen Huanting, Wu Jiaxue, Liu Xincheng, et al. Material Flux of the Changjiang Estuary[M]. Beijing:China Ocean Press, 2001:11-153.

Scully M E, Geyer W R, Lerczak J A. The influence of lateral advection on the residual estuarine circulation:a numerical modeling study of the Hudson River Estuary[J]. Journal of Physical Oceanography, 2009, 39(1):107-124.

Nunes R A, Simpson J H. Axial convergence in a well-mixed estuary[J]. Estuarine, Coastal and Shelf Science, 1985, 20(5):637-649.

Huzzey L M, Brubaker J M. The formation of longitudinal fronts in a coastal plain estuary[J]. Journal of Geophysical Research, 1988, 93(C2):1329-1334.

Cheng Peng, Wilson R E, Chant R J, et al. Modeling influence of stratification on lateral circulation in a stratified estuary[J]. Journal of Physical Oceanography, 2009, 39(9):2324-2337.

Lerczak J A, Geyer W R. Modeling the lateral circulation in straight, stratified estuaries[J]. Journal of Physical Oceanography, 2004, 34(6):1410-1428.

汪亚平, 高抒, 贾建军. 海底边界层水流结构及底移质搬运研究进展[J]. 海洋地质与第四纪地质, 2000, 20(3):101-106. Wang Yaping, Gao Shu, Jia Jianjun. Flow structure in the marine boundary layer and bedload transport:a review[J]. Marine Geology & Quaternary Geology, 2000, 20(3):101-106.

李文祥, 张静怡, 徐小明. 长江口潮流速垂线分布规律研究[J]. 水文, 2010, 30(3):68-70, 76. Li Wenxiang, Zhang Jingyi, Xu Xiaoming. Study on vertical distribution of Yangtze Estuary tidal velocity[J]. Journal of China Hydrology, 2010, 30(3):68-70, 76.

van Rijn L C. Principles of sediment transport in rivers, estuaries and coastal seas, Part Ⅰ:Edition 1993[M]. The Netherlands:Aqua Publications, 1993.

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