Human effects on the residual circulations in the Lingding Bay, Zhujiang River Estuary: a case study of neap tides during flood season

Mei Jinya; Chen Yongping; Chu Nanyang; Su Min; Liu Pei; Yao Peng

doi:10.12284/hyxb2023013

Volume 45 Issue 2

Feb. 2023

Turn off MathJax

Article Contents

Article Navigation > Haiyang Xuebao > 2023 > 45(2): 27-41

Mei Jinya，Chen Yongping，Chu Nanyang, et al. Human effects on the residual circulations in the Lingding Bay, Zhujiang River Estuary: a case study of neap tides during flood season[J]. Haiyang Xuebao，2023, 45(2)：27–41 doi: 10.12284/hyxb2023013

Citation:

PDF( 5827 KB)

Human effects on the residual circulations in the Lingding Bay, Zhujiang River Estuary: a case study of neap tides during flood season

doi: 10.12284/hyxb2023013

Mei Jinya^{1, 2
,},
Chen Yongping^{1, 2},
Chu Nanyang³,
Su Min²,
Liu Pei⁴,
Yao Peng^{1, 2, 5
,
,}

1.
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
2.
College of Harbor Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China
3.
Zhuhai UM Science & Technology Research Institute, Zhuhai 519031, China
4.
The Pearl River Hydraulic Research Institute, Guangzhou 510611, China
5.
State Key Laboratory of Coastal and Office Engineering, Dalian University of Technology, Dalian 116024, China

Received Date: 2022-04-23
Rev Recd Date: 2022-08-30

Available Online: 2022-10-19

Publish Date: 2023-02-01

Abstract

Abstract

Over the past 20 years, the morphology of the Lingding Bay in the Zhujiang River Estuary has undergone anomalous changes, which is far beyond natural processes due to the influence of high intensity human activities. Hence, the resulted estuarine dynamics have inevitably influenced as well as the material transport processes. In this study, a three-dimensional model has been setup to explore the changes of residual circulation pattern in the Lingding Bay over the past 20 years and their potential impacts. The results show that the bottom residual flow along the East and West channels is turned towards the Middle Shoal area, which promotes the sedimentation there. The lateral residual circulation in the Middle Shoal depicts a layered structure of the surface to the west and the bottom to the east, mainly driven by the non-linear advection term. The large-scale sand mining in the Middle Shoal has resulted in the eastward shift of the residual circulation structure and the enhancement of the surface and bottom residual currents, which can accelerate the exchange of material between the surface and bottom layers. A longitudinal residual circulation structure exists in the West Channel with the surface layer seaward and the bottom layer landward, driven mainly by barotropic and baroclinic pressure gradient forces. Due to the effect of dredging depth, both the landward baroclinic pressure gradient force and the non-linear convection term are enhanced, the seaward-direction surface residual flow reduces by 22%, while the landward-direction bottom residual flow increases by 24%, which will weaken the exchange capacity of the water body in the western trough during the neap tide period, i.e. slow down the material export, resulting in the siltation of the western trough and the weakening of the water environment. This study can provide implications for understanding of estuarine residual circulation as well as material transport under anthropogenic disturbance.
- longitudinal residual circulation,
- lateral residual circulation,
- human activities,
- Lingding Bay,
- three-dimensional numerical model

FullText(HTML)

References(30)

References

[1]	Chen Lianghong, Gong Wenping, Zhang Heng, et al. Lateral circulation and associated sediment transport in a convergent estuary[J]. Journal of Geophysical Research: Oceans, 2020, 125(8): e2019JC015926.
[2]	Masunaga E, Arthur R S, Yamazaki H. Baroclinic residual circulation and mass transport due to internal tides[J]. Journal of Geophysical Research: Oceans, 2020, 125(4): e2019JC015316.
[3]	Zhou Zaiyang, Ge Jianzhong, van Maren D S, et al. Study of sediment transport in a tidal channel-shoal system: lateral effects and slack-water dynamics[J]. Journal of Geophysical Research: Oceans, 2021, 126(3): e2020JC016334.
[4]	Shen Qi, Huang Wenrui, Wan Yuanyang, et al. Observation of the sediment trapping during flood season in the deep-water navigational channel of the Changjiang Estuary, China[J]. Estuarine, Coastal and Shelf Science, 2020, 237: 106632. doi: 10.1016/j.ecss.2020.106632
[5]	蒋杰, 何青, 朱磊, 等. 长江口浑浊带核心区北槽水动力特征研究[J]. 海洋学报, 2019, 41(1): 11−20. Jiang Jie, He Qing, Zhu Lei, et al. Analysis of hydrodynamic features of the North Passage in the turbidity maximum, Changjiang Estuary[J]. Haiyang Xuebao, 2019, 41(1): 11−20.
[6]	Lin Lei, Liu Zhe, Xie Lian, et al. Dynamics governing the response of tidal current along the mouth of Jiaozhou Bay to land reclamation[J]. Journal of Geophysical Research: Oceans, 2015, 120(4): 2958−2972. doi: 10.1002/2014JC010434
[7]	王宗旭, 乔煜, 季小梅, 等. 珠江河口岸线变化对潮动力的影响[J]. 科学技术与工程, 2020, 20(3): 1171−1180. Wang Zongxu, Qiao Yu, Ji Xiaomei, et al. The influence of coastline changes on tidal dynamics in the Pearl River Estuary[J]. Science Technology and Engineering, 2020, 20(3): 1171−1180.
[8]	Wang Zhengbing, Jeuken M C J L, Gerritsen H, et al. Morphology and asymmetry of the vertical tide in the Westerschelde Estuary[J]. Continental Shelf Research, 2002, 22(17): 2599−2609. doi: 10.1016/S0278-4343(02)00134-6
[9]	Chu Nanyang, Yao Peng, Ou Suying, et al. Response of tidal dynamics to successive land reclamation in the Lingding Bay over the last century[J]. Coastal Engineering, 2022, 173: 104095. doi: 10.1016/j.coastaleng.2022.104095
[10]	Wong L A, Chen J C, Xue Huijie, et al. A model study of the circulation in the Pearl River Estuary (PRE) and its adjacent coastal waters: 2. Sensitivity experiments[J]. Journal of Geophysical Research: Oceans, 2003, 108(C5): 3157. doi: 10.1029/2002JC001452
[11]	Wong L A, Chen J C, Xue Huijie, et al. A model study of the circulation in the Pearl River Estuary (PRE) and its adjacent coastal waters: 1. Simulations and comparison with observations[J]. Journal of Geophysical Research: Oceans, 2003, 108(C5): 3156. doi: 10.1029/2002JC001451
[12]	王彪. 伶仃洋河口环流特征及其动力机制分析[J]. 水动力学研究与进展A辑, 2014, 29(5): 608−617. Wang Biao. Analysis on the estuarine circulation and its dynamic mechanism in the Lingdingyang Bay[J]. Chinese Journal of Hydrodynamics, 2014, 29(5): 608−617.
[13]	Lin Shicheng, Liu Guangping, Niu Jianwei, et al. Responses of hydrodynamics to changes in shoreline and bathymetry in the Pearl River Estuary, China[J]. Continental Shelf Research, 2021, 229: 104556. doi: 10.1016/j.csr.2021.104556
[14]	易侃, 龚文平. 伶仃洋河口横向环流[J]. 海洋学报, 2015, 37(3): 1−14. Yi Kan, Gong Wenping. Lateral circulation in the Lingding Estuary[J]. Haiyang Xuebao, 2015, 37(3): 1−14.
[15]	杨清书. 破解珠江河口治理挑战, 构筑粤港澳大湾区用水安全[J]. 中国环境管理, 2018, 10(1): 101−102. Yang Qingshu. Solving the challenges of managing the Pearl River Estuary and building water security in the Guangdong-Hong Kong-Macao Greater Bay Area[J]. Chinese Journal of Environmental Management, 2018, 10(1): 101−102.
[16]	罗宪林, 杨清书, 贾良文, 等. 珠江三角洲网河河床演变[M]. 广州: 中山大学出版社, 2002. Luo Xianlin, Yang Qingshu, Jia Liangwen, et al. River-Bed Evolution of the Pearl River Delta[M]. Guangzhou: Sun Yat-Sen University press, 2002.
[17]	Mao Qingwen, Shi Ping, Yin Kedong, et al. Tides and tidal currents in the Pearl River Estuary[J]. Continental Shelf Research, 2004, 24(16): 1797−1808. doi: 10.1016/j.csr.2004.06.008
[18]	Wu Ziyin, Milliman J D, Zhao Dineng, et al. Recent geomorphic change in Lingding Bay, China, in response to economic and urban growth on the Pearl River Delta, Southern China[J]. Global and Planetary Change, 2014, 123: 1−12. doi: 10.1016/j.gloplacha.2014.10.009
[19]	姚鹏. 人类活动对珠江口伶仃洋年代际动力地貌演变的贡献研究[D]. 广州: 中山大学, 2019. Yao Peng. Decadal varibility of Lingdingyang Bay morphodynamcs: the role of human activities[D]. Guangzhou: Sun Yat-sen University, 2019.
[20]	谢丽莉, 刘霞, 杨清书, 等. 人类活动驱动下伶仃洋洪季大潮水沙异变[J]. 泥沙研究, 2015(3): 56−62. doi: 10.16239/j.cnki.0468-155x.2015.03.009 Xie Lili, Liu Xia, Yang Qingshu, et al. Variations of current and sediment transport in Lingding Bay during spring tide in flood season driven by human activities[J]. Journal of Sediment Research, 2015(3): 56−62. doi: 10.16239/j.cnki.0468-155x.2015.03.009
[21]	Hydraulics D. Delft3D-FLOW User Manual. Version: 3.15[M]. Delft: Deltares, 2018.
[22]	夏维, 周争桥. 基于观测资料的珠江口附近海域夏季气象水文要素分析[J]. 海洋湖沼通报, 2021, 43(5): 60−65. doi: 10.13984/j.cnki.cn37-1141.2021.05.008 Xia Wei, Zhou Zhengqiao. Analysis of meteorological and hydrological elements in the sea around the Pearl River Estuary based on observed data in summer[J]. Transactions of Oceanology and Limnology, 2021, 43(5): 60−65. doi: 10.13984/j.cnki.cn37-1141.2021.05.008
[23]	Allen J I, Somerfield P J, Gilbert F J. Quantifying uncertainty in high-resolution coupled hydrodynamic-ecosystem models[J]. Journal of Marine Systems, 2007, 64(1/4): 3−14.
[24]	袁菲, 卢陈, 杨裕桂, 等. 珠江口伶仃洋及磨刀门盐淡水混合特征及机制分析[J]. 海洋环境科学, 2021, 40(3): 361−368, 378. doi: 10.12111/j.mes.20200018 Yuan Fei, Lu Chen, Yang Yugui, et al. Comparative analysis of the characteristics and mechanism of the salt-fresh water mixing in Lingdingyang and Modaomen Estuary, Pearl River Estuary[J]. Marine Environmental Science, 2021, 40(3): 361−368, 378. doi: 10.12111/j.mes.20200018
[25]	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. doi: 10.1175/2008JPO3952.1
[26]	Martin W D, MacCready P. Influence of large-scale tidal asymmetry on subtidal dynamics in the western Strait of Juan de Fuca[J]. Journal of Geophysical Research: Oceans, 2011, 116(C2): C02009.
[27]	Yang Gang, Wang Xiaohua, Cheng Zhixin, et al. Modelling study on estuarine circulation and its effect on the turbidity maximum zone in the Yalu River Estuary, China[J]. Estuarine, Coastal and Shelf Science, 2021, 263: 107634. doi: 10.1016/j.ecss.2021.107634
[28]	Wu Tianning, Wu Hui. Tidal mixing sustains a bottom-trapped river plume and buoyant coastal current on an energetic continental shelf[J]. Journal of Geophysical Research: Oceans, 2018, 123(11): 8026−8051. doi: 10.1029/2018JC014105
[29]	应强, 何杰, 辛文杰. 巨型人工采砂坑对伶仃洋自然演变的影响[J]. 水科学进展, 2019, 30(6): 915−922. Ying Qiang, He Jie, Xin Wenjie. Influence of giant artificial sand pits on the natural evolution of Lingding Bay[J]. Advances in Water Science, 2019, 30(6): 915−922.
[30]	欧素英. 华南不同类型热带风暴驱动下珠江口表层悬沙分布趋势[J]. 热带海洋学报, 2019, 38(3): 22−31. Ou Suying. Surface suspended sediment distribution of Pearl RiveR Estuary under tropical storms with different wind and river discharge forcing[J]. Journal of Tropical Oceanography, 2019, 38(3): 22−31.