Analysis of erosion and deposition evolution of inshore shoals and channels along the Jinshanzui to Longquangang segment in the northern Hangzhou Bay

doi:10.3969/j.issn.1001-909X.2020.03.010

Abstract

Abstract: Taking Jinshanzui-Longquangang marginal shoal in the northern Hangzhou Bay as the study area, based on the measured and chart data from 1989 to 2014, we analyzed the topographic change of beach section and the variation characteristics of erosion and deposition of regional beach section along the Jinshanzui to Longquangang(JSZ-LQG) segment. The results showed that during study period there was relative stable eroded deepen channel in the study area, and the scouring and silting of the nearshore seabed showed a "fluctuating" law. The shallow area above 5 m water depth(2014) presented accreted patterns, meanwhile, seabed below 5 m water depth(2014) showed a general scouring trend since 1989. Moreover, variation of sediment discharge into the Yangtze River is an influencing factor of erosion/deposition in the study area. The typhoon waves, movement of the erosion and accretion sand body induced complexity in erosion and accretion in seabed of the JSZ-LQG segment.

Key words: seashores erosion and deposition, shoal-channel evolution, north bank of Hangzhou Bay

CLC Number:

TV148

FENG Lingxuan, JI Yongxing, ZHANG Xinyao, DAI Zhijun. Analysis of erosion and deposition evolution of inshore shoals and channels along the Jinshanzui to Longquangang segment in the northern Hangzhou Bay[J]. Journal of Marine Sciences, 2020, 38(3): 92-98.

References

[1] Core Writing Team, PACHAURI R K, MEYER L A. Climate Change 2014: Synthesis report[R]. Geneva, Switzerland: IPCC, 2014: 64-73.
[2] BESSET M, ANTHONY E J, BOUCHETTE F. Multi-decadal variations in delta shorelines and their relationship to river sediment supply: an assessment and review[J]. Earth-Science Reviews, 2019, 193: 199-219.
[3] MILLIMAN J D, FARNSWORTH K L. River discharge to the coastal ocean[M]. Cambridge, UK: Cambridge University Press, 2011: 392.
[4] DAI Zhijun, LIU J T. WEI Wen, et al. Detection of the Three Gorges Dam influence on the Changjiang(Yangtze River) submerged delta[J]. Scientific Reports, 2014, 4(1): 357-375.
[5] 陈建勇,戴志军,陈吉余,等.杭州湾北岸弧形岸段悬沙净输移分析——以龙泉—南竹港岸段为例[J].泥沙研究,2009(2):53-59.
CHEN Jianyong, DAI Zhijun, CHEN Jiyu, et al. Analysis on the net sediment transportation along arc-shaped coast in the northern bank, Hangzhou bay—a case study of Longquan-Nanzhu harbor segment [J]. Journal of Sediment Research, 2009(2): 53-59.
[6] 茅志昌,郭建强,虞志英,等.杭州湾北岸岸滩冲淤分析[J].海洋工程,2008,26(1):108-113.
MAO Zhichang, GUO Jianqiang, YU Zhiying, et al. Analysis on erosion and siltation of tidal flats in the north part of the Hangzhou Bay[J]. The Ocean Engineering, 2008, 26(1): 108-113.
[7] DAI Zhijun, LIU J T. XIE Hualiang, et al. Sedimentation in the outer Hangzhou Bay, China: The influence of Changjiang sediment load[J]. Journal of Coastal Research, 2014, 30(6): 1218-1225.
[8] 郑璐,李梦雅,王军,等.上海石化近岸海床冲淤特征与海堤稳定性分析[J].长江流域资源与环境,2015,24(8):1293-1298.
ZHENG Lu, LI Mengya, WANG Jun, et al. Analysis on the erosion-accertion changes of Shanghai Petrochemical Complex offshore seabed and the seawall stability[J]. Resources and Environment in the Yangtze Basin, 2015, 24(8): 1293-1298.
[9] 茅志昌,郭建强,赵常青.杭州湾北岸金汇潮滩冲淤分析[J].海洋湖沼通报,2006(4):9-16.
MAO Zhichang, GUO Jianqiang, ZHAO Changqing. Siltation or erosion of the Jinhui tidal flat in the north of Hangzhou Bay[J]. Transactions of Oceanology and Limnology, 2006(4): 9-16.
[10] 戴志军,张小玲,闫虹,等.台风作用下淤泥质海岸动力地貌响应[J].海洋工程,2009,27(2):63-69.
DAI Zhijun, ZHANG Xiaoling, YAN Hong, et al. Morphodynamic behavior of the mud coast in response to typhoon action[J]. The Ocean Engineering, 2009, 27(2): 63-69.
[11] 陈吉余,夏东兴,虞志英,等.中国海岸侵蚀概要[M].北京:海洋出版社,2010:165-180.
CHEN Jiyu, XIA Dongxing, YU Zhiying, et al. Summary of coastal erosion in China[M]. Beijing: China Ocean Press, 2010:165-180.
[12] 程海峰,刘杰,郑文燕,等.杭州湾北岸漕泾段岸滩冲淤演变分析[C].第十七届中国海洋(岸)工程学术讨论会论文集,2015:47-53.
CHENG Haifeng, LIU Jie, ZHENG Wenyan, et al. Analysis of erosion and siltation evolution of the North Bank of Caojing Bay[C]. Proceedings of the 17th China Offshore Engineering Symposium, 2015: 47-53.
[13] 虞志英,楼飞.长江口南汇嘴近岸海床近期演变分析——兼论长江流域来沙量变化的影响[J].海洋学报,2004,26(3):47-53.
YU Zhiying, LOU Fei. The evolvement characteristics of Nanhuizui foreland in the Changjiang Estuary, China[J]. Acta Oceanologica Sinica, 2004, 26(3): 47-53.
[14] 刘苍字,虞志英.杭州湾北岸的侵蚀/淤积波及其形成机制[J].福建地理,2000,15(3):12-15.
LIU Cangzi, YU Zhiying. Erosion/deposition wave and its formation mechanism in the north bank of Hangzhou Bay[J]. Fujian Geography, 2000, 15(3): 12-15.
[15] DAI Zhijun, FAGHERAZZI S, MEI Xuefei, et al. Decline in suspended sediment concentration delivered by the Changjiang (Yangtze) River into the East China Sea between 1956 and 2013[J]. Geomorphology, 2016, 268: 123-132.
[16] CHEN Jiyu, LIU Cangzi, WALKER Z C J. Geomorphological development and sedimentation in Qiantang Estuary and Hangzhou Bay[J]. Journal of Coastal Research, 1990, 6(3): 559-572.
[17] 王颖,刘桦,张景新.杭州湾北岸水下地形冲淤演变分析[J].水道港口,2011,32(3):173-178.
WANG Ying, LIU Hua, ZHANG Jingxin. Analysis on scouring-silting evolution of sea bottom near north bank of Hangzhou Bay[J]. Journal of Waterway and Harbor, 2011, 32(3): 173-178.
[18] 曹佳,茅志昌,沈焕庭.杭州湾北岸岸滩冲淤演变浅析[J].海洋学研究,2009,27(4):1-9.
CAO Jia, MAO Zhichang, SHEN Huanting. A brief analysis of scour and silting of the tidal flats at the north bank of the Hangzhouwan Bay[J]. Journal of Marine Sciences, 2009, 27(4):1-9.
[19] 赖晓鹤.三峡建坝后河床冲刷过程与机理及其对入海泥沙通量的影响和预测[D].上海:华东师范大学,2017.
LAI Xiaohe. The process and mechanism of river channel erosion below Three Gorges Dam-its effect and prediction to sediment load intu sea[D]. Shanghai: ECNU, 2017.
[20] 何小燕,冯凌旋,严婧,等.近期杭州湾北岸金山岸段滩势演变机制及趋势分析[J].海洋地质前沿,2018,34(4):1-7.
HE Xiaoyan, FENG Lingxuan, YAN Jing, et al. Morphological evolution and future development of the Jinshan coast at the north bank of Hangzhou bay[J]. Marine Geology Frontiers, 2018, 34(4): 1-7.
[21] 黄赛花,吴彦坤,孙志林.海湾工程对杭州湾北岸深槽潮流的影响[J].浙江大学学报:理学版,2015,42(5):605-611.
HUANG Saihua, WU Yankun, SUN Zhilin. Impact of the gulf projects on the tidal currents of deep channel in the northern coast of Hangzhou Bay[J]. Journal of Zhejiang University(Science Edition), 2015, 42(5): 605-611.
[22] YING Ming, ZHANG Wei, YU Hui, et al. An overview of the China Meteorological Administration Tropical Cyclone Database[J]. Journal of Atmospheric & Oceanic Technology, 2014, 31(2): 287-301.
[23] 许灵静,杨波,江文胜.台风对杭州湾水交换影响的定量研究[J].中国海洋大学学报(自然科学版),2016,46(6):29-41.
XU Lingjing, YANG Bo, JIANG Wensheng. Quantitative study on water exchange affected by typhoons in the Hangzhou Bay[J]. Journal of Ocean University of China, 2016, 46(6): 29-41.
[24] 徐卢笛,贺治国,潘佳佳,等.风暴潮过程中波浪对地形演变影响的数值研究[J].水力发电学报,2019,38(3):23-31.
XU Ludi, HE Zhiguo, PAN Jiajia, et al. Numerical study of wave effects on changes in offshore morphology during storm surges[J]. Journal of Hydroelectric Engineering, 2019, 38(3): 23-31.