Beach erosion and protection effect analysis on the upstream of the North Branch of the Changjiang (Yangtze) Estuary

JI Yongxing; LI Lu; YUAN Lin; CHEN Xuechu

doi:10.16028/j.1009-2722.2022.306

2024 Vol. 40, No. 2

Article Contents

Article navigation > Marine Geology Frontiers > 2024 > 40(2): 11-19

Next Article Previous Article

JI Yongxing, LI Lu, YUAN Lin, CHEN Xuechu. Beach erosion and protection effect analysis on the upstream of the North Branch of the Changjiang (Yangtze) Estuary[J]. Marine Geology Frontiers, 2024, 40(2): 11-19. doi: 10.16028/j.1009-2722.2022.306

Citation:

JI Yongxing, LI Lu, YUAN Lin, CHEN Xuechu. Beach erosion and protection effect analysis on the upstream of the North Branch of the Changjiang (Yangtze) Estuary[J]. Marine Geology Frontiers, 2024, 40(2): 11-19. doi: 10.16028/j.1009-2722.2022.306

Beach erosion and protection effect analysis on the upstream of the North Branch of the Changjiang (Yangtze) Estuary

1.
Shanghai Water Engineering Design and Research Institute Co. Ltd., Shanghai 200061, China
2.
Shanghai Engineering Research Center on Coastal Zone, Shanghai 200061, China
3.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China

Received Date: 14 November 2022

Publish Date: 28 February 2024

Abstract

Abstract

Abstracts: Duo to frequent construction activities in the upstream and downstream of Changjiang (Yangtze) River, and water and sediment flows from the South Branch and North Branch in the Changjiang River mouth, the upstream of the North Branch has suffered from severe erosion and recession in recent years. To reveal the evolution mechanism of the upstream of the North Branch, control the river regime change, and protect the ecological background, the underwater terrain data of the whole river course of the North Branch since 2001 were collected, and the fine measurement of underwater terrain in the construction area from 2017 to 2020 was carried out. Based on the hydrodynamic mathematical model, the beach protection measures were studied and demonstrated, and the effect of the protection measures after implementation was evaluated in fractal theory. Results show that: ① the sandbar development at the entrance of upstream of the Northern Branch leads to the increase of the curvature of the upper S-shaped principal axis, which aggravates the instability of shoal, sandbar, and beach; ② the spur-dike and berm combination can effectively prevent the erosion and retreat of the most severely scoured beach; ③ the beach tends to be stablized and the ecological base has been restored as shown by after many-year underwater topography measurement according to fractal theory calculation and evaluation. Finally, the complexity of the evolution was aggravated by the changes of shoal, sandbar and deep channel in the upstream of the North Branch, it is suggested to establish a comprehensive coordination department as soon as possible to put forward a comprehensive improvement plan to meet the multi-objective needs of water conservancy, flood control, water supply, navigation, ecology, etc.
- beach erosion /
- beach protection /
- hydrodynamic model /
- fractal dimension /
- North Branch of the Yangtze Estuary

FullText(HTML)

References

[1]	左书华,杨春松,付桂,等. 长江口入海水沙通量变化及其影响分析[J]. 海洋地质前沿,2022,38(11):56-64. doi: 10.16028/j.1009-2722.2022.076 CrossRef Google Scholar
[2]	季永兴,卢永金,莫敖全. 长江口外沙内泓河段保滩护岸对策研究[J]. 水土保持通报,2001,1:15-18. doi: 10.3969/j.issn.1000-288X.2001.01.004 CrossRef Google Scholar
[3]	朱绳祖,张国安,张卫国,等. 近期长江口崇明岛周边岸滩沉积特征及影响机制[J]. 长江流域资源与环境,2019,28(10):2441-2451. Google Scholar
[4]	DAI Z J,FAGHERAZZI S,MEI X F,et al. Linking the infilling of the North Branch in the Changjiang (Yangtze) Estuary to anthropogenic activities from 1958 to 2013[J]. Marine Geology,2016,379(11):1-12. Google Scholar
[5]	代炳珂,路川藤,韩玉芳,等. 1958年以来长江口南、北支河段河床演变及影响因素研究[J]. 水利水运工程学报,2021,2:27-37. doi: 10.12170/20210105003 CrossRef Google Scholar
[6]	DING J,SHAO Y C,WU D A. Effect of tidal currents on the transport of saline water from the North Branch in the Changjiang River estuary[J]. Journal of Oceanology and Limnology,2018,36(6):2085-2097. doi: 10.1007/s00343-018-7357-5 CrossRef Google Scholar
[7]	GUO L C,XIE W M,XU F,et al. A historical review of sediment export-import shift in the North Branch of Changjiang Estuary[J]. Earth Surface Processes and Landforms,2022,47(1):5-16. doi: 10.1002/esp.5084 CrossRef Google Scholar
[8]	李志鹏,朱建荣. 2007—2016年北支河势变化对长江口盐水入侵影响数值研究[J]. 华东师范大学学报(自然科学版),2022,3:109-124. doi: 10.3969/j.issn.1000-5641.2022.03.012 CrossRef Google Scholar
[9]	孙永涛,张金池. 长江口北支湿地分类及生境特征[J]. 湿地科学与管理,2010,6(2):49-52. doi: 10.3969/j.issn.1673-3290.2010.02.11 CrossRef Google Scholar
[10]	杨宏兵,罗锋,常曼,等. 南通市沿海滩涂资源围垦开发现状与成效[J]. 水运工程,2017,529(S1):33-36. doi: 10.16233/j.cnki.issn1002-4972.2017.s1.009 CrossRef Google Scholar
[11]	季永兴, 卢永金, 莫敖全. 崇明北沿滩涂促淤围垦水流数学模型研究（之二）[C]//第十四届全国水动力学研讨会论文集, 北京: 海洋出版社, 2000: 244-249. Google Scholar
[12]	汤臣栋. 上海崇明东滩互花米草生态控制与鸟类栖息地优化工程[J]. 湿地科学与管理,2016,12(3):4-8. doi: 10.3969/j.issn.1673-3290.2016.03.01 CrossRef Google Scholar
[13]	GU J,QIN X,CHEN W,et al. Influence of the diversion angle on flow characteristics of the North Branch of the Changjiang River Estuary[J]. Advanced Materials Research,2012(610/613):2697-2700. Google Scholar
[14]	陈美发, 卢永金, 季永兴. 崇明北沿滩涂促淤围垦水流数学模型研究（之一）[C]//第十四届全国水动力学研讨会论文集, 北京: 海洋出版社, 2000: 238-243. Google Scholar
[15]	MANDELBROT B. How long is the coast of Britain? Statistical self-similarity and fractional dimension[J]. Science,1967,156(3775):636-638. doi: 10.1126/science.156.3775.636 CrossRef Google Scholar
[16]	YILMAZER D,BERKER A N,YILMAZ Y. Fractal measures of sea,lake,strait,and dam-reserve shores:calculation,differentiation,and interpretation[J]. Physica A:Statistical Mechanics and its Applications,2021,579:126106. doi: 10.1016/j.physa.2021.126106 CrossRef Google Scholar
[17]	岳文,颜彬,张彤辉. 基于分形理论的珠江口海岸线变迁分析[J]. 海洋开发与管理,2020,37(7):38-41. Google Scholar
[18]	林松,俞晓牮,庄小冰,等. 厦门岛海岸线分形特性演变规律的研究[J]. 海洋科学进展,2020,38(1):121-129. doi: 10.3969/j.issn.1671-6647.2020.01.013 CrossRef Google Scholar
[19]	许宁,高志强,宁吉才. 基于分形维数的环渤海地区海岸线变迁及成因分析[J]. 海洋学研究,2016,34(1):45-51. doi: 10.3969/j.issn.1001-909X.2016.01.006 CrossRef Google Scholar
[20]	张云峰,张振克,刘玉卿,等. 长江口北支沉积动力变化及对人类活动的响应[J]. 人民长江,2019,50(9):24-29. doi: 10.16232/j.cnki.1001-4179.2019.09.005 CrossRef Google Scholar
[21]	李文杰,沈永明. 长江口北支中束窄工程对周边水动力及水质的影响[J]. 水运工程,2017(12):42-50,70. doi: 10.3969/j.issn.1002-4972.2017.12.009 CrossRef Google Scholar
[22]	许宝华,乔红杰. 长江口北支涌潮现状分析[J]. 长江科学院院报,2019,36(5):13-17. Google Scholar
[23]	朱巧云,张志林,乔红杰. 长江口北支河段整治工程实施后沉积物特征分析[J]. 人民长江,2019,50(10):26-31. doi: 10.16232/j.cnki.1001-4179.2019.10.005 CrossRef Google Scholar
[24]	吴华林,张俊勇,刘高峰. 长江口北支综合整治与开发思路探讨[J]. 长江流域资源与环境,2011,20(S1):9-13. Google Scholar
[25]	杨芳丽,韩婷,闫军,等. 长江口北支河段演变分析及航道治理思路初探[J]. 水运工程,2014,12:79-82. doi: 10.3969/j.issn.1002-4972.2014.06.017 CrossRef Google Scholar
[26]	林芬芬,季岚,曹慧江,等. 长江口北支河段碍航特性及治理思路[J]. 水运工程,2021,6:177-182,199. doi: 10.3969/j.issn.1002-4972.2021.07.030 CrossRef Google Scholar