The EOF analysis on the profile change of tidal flat among groins

Abstract

Abstract: The Empirical Orthogonal Function analysis (EOF analysis) is often used to analyze the raw data based on the multivariate statistical method. This method was applied to analyze the evolution of muddy tidal flat after the construction of the groins located in Zhejiang Rui'an. In the paper, the deviation matrix was split to the spatial and temporal eigenfunctions. The linear combination of three main empirical eigenfunctions was used to reflect the topographic change of tidal flat, which represent the overall change, seasonal change and accidental disturbance of the tidal flat respectively. In order to get general laws of muddy tidal evolution after the establishment of the groins, the relationship between dynamic process and geomorphology was discussed preliminary in this paper. Based on the coastal dynamic geomorphology theory, the factors that impact the tidal flat change in both spatial and temporal were discussed and the dynamic relationship between geomorphology and impact factors was analyzed. The second eigenfunction corresponding dynamic process was expounded in detail, and the result shows that wave is the main factor affecting the seasonal variation of muddy tidal flat in Zhejiang Rui' an.

Key words: muddy tidal flat, topographic change, the EOF analysis

CLC Number:

P737

GUO Feng-xia, QIU Jian-li, WU Song-hua, GUO Guo-ming. The EOF analysis on the profile change of tidal flat among groins[J]. Journal of Marine Sciences, 2012, 30(4): 37-45.

References

[1] WINANT C D, INMAN D L, NORDSTROM C E.Description of seasonal beach changes using empirical eigenfunctions[J]. Journal of Geophysical Research, 1975,80(15):1980-1 986.
[2] CHEN Zi-shen.Analysis on spatial and temporal processes of beach profile variations[J]. Marine Science Bulletin, 2000,19(2): 42-48.
陈子藥. 海滩剖面时空变化过程分析[J].海洋通报, 2000,19(2): 42-48.
[3] CHEN Zi-shen, LI Chun-chu.Analysis on geomorphological dy-namics of beach profile of intermediate transitional zone in arc-shaped shore[J]. Marine Science, 1990(2):6-12.
陈子燊,李春初.弧形海岸中间过渡带海滩剖面地貌动态分析[J].海洋科学,1990(2):6-12.
[4] CHEN Zi-shen.Progress in studies on the shapes and dynamics of beach profiles[J]. Marine Science Bulletin,1997,16(1):86-91.
陈子樂. 海滩剖面形态与地形动态研究进展[J].海洋通报,1997, 16(1):86-91.
[5] JIN Qing-xiang, LAO Zhi-sheng, GONG Min.The EOF method on analysis muddy temporal variations located in north Hangzhou Bay, Jinhui[J]. Acta Oceanologica Sinica, 1988, 10(3):327-333.
金庆祥,劳治声,龚敏.应用经验正交函数分析杭州湾北岸金汇港泥质潮滩随时间的变化[J].海洋学报,1988,10(3):327-333.
[6] XU Xing-huang, SUN Ting-zhao, HUANG Jin-peng. Investiga-tion on the effect of accelerating silt accumulation of the composite of groin system and detached dike[J]. Coastal Engineering, 1985,3(1):15-23.
许星煌,孙庭兆,黄晋鹏.丁坝群和顺岸坝组合工程促淤效果研究[J].海洋工程,1985,3(1):15-23.
[7] The Coastal Zone and Tidal Marsh Resources Comprehensive Sur-vey. Wenzhou experimentsite area report[M]. Shanghai: East China Normal University Press, 1981.
全国海岸带和海涂资源综合调查温州试点工作队.全国海岸带和海涂资源综合调查.温州试点区报告文集[M].上海:华东师范大学出版社,1981.
[8] MARCP,DEAN R G. Prediction of beach planforms and littoral controls[J]. Coastal Engineering, 1978,110:1 818-1 837.
[9] WANG Shang-yi, ZHOU Ben-fan. Calculation of coastal sediment rate[J]. Acta Oceanologica Sinica, 1991,13(5):692-702.
王尚毅,周本凡.沿岸输沙率计算[J].海洋学报,1991, 13(5):692-702.
[10] ISAO I.Nearshore dynamics and coastal processes[J]. WANG Wen-hai translated. Coastal Engineering,1995, 14(2):55-66.
ISAO I.海滩地貌及其变化[J].王文海译.海岸工程,1995,14(2):55-66.
[11] QIU Jian-li.Shoreline change numerical simulation and equilibri-um shore-arc analysis of embayed muddy coast[J]. Oceanologiaet Limnologia Sinica, 1991,22(4):369-375
邱建立. 港湾淤泥质海岸的岸线变化数值模拟和平衡岸弧分析[J].海洋与湖沼,1991,22(4):369-375.
[12] ROBERT S Y,DAVID M B.Discussion of the generalized model for simulating shoreline change(GENESIS)[J]. Journal of Coast-al Research,1995,11(3):875-886.
[13] PRICE W A.Predication changes in the plan shape beaches[J]. Coastal Engineering, 1972,72:1 321-1 329.

[1]	GONG Zhaohui, SHI Lianqiang, ZHANG Daheng, ZHANG Huaguo, . Comparative study on remote sensing of coastlines and reclamation of typical bays in China and Vietnam: Taking Fangcheng Bay and Haiphong Port as examples [J]. Journal of Marine Sciences, 2022, 40(3): 62-72.
[2]	WANG Jiuyao, ZHOU Jieqiong, WU Ziyin, ZHU Chao, ZHAO Di‘’neng, . Wavelet decomposition of small-scale submarine sand wave based on bottom-moored in situ observation [J]. Journal of Marine Sciences, 2022, 40(2): 32-41.
[3]	CAO Wenting, ZHANG Huaguo, LI Rui. Change characters of coastline and tidal flat in the islands with different principle functions in the Zhoushan Archipelago from 1986 to 2017 [J]. Journal of Marine Sciences, 2021, 39(4): 123-131.
[4]	LIN Mingxiang, CAI Tinglu, WANG Xinkai, XIA Xiaoming. Temporal and spatial evolution characteristics of the coastline in Sanmen Bay, Zhejiang in past 100 years [J]. Journal of Marine Sciences, 2021, 39(1): 47-55.
[5]	LUO Zhengyu, ZHANG Li, CHEN Bowei, SUN Hao, BI Jingpeng. Analysis of the spatial and temporal variation of Thailand coastline from 1990 to 2020 [J]. Journal of Marine Sciences, 2021, 39(1): 56-66.
[6]	WANG Yanbing, HAN Xibin, HU Zhilong, ZHAO Ning, YANG Fanlin, GE Qian, XU Dong, GAO Jinyao. Morphology, distribution and evolution process of submarine canyons in the Asian Continental Margin [J]. Journal of Marine Sciences, 2020, 38(4): 48-57.
[7]	XIA Hantao, LONG Yuannan, LIU Cheng, LIU Xiaojian. Spatio-temporal evolution analysis of the coastline inthe Pearl River Delta from 1973 to 2018 [J]. Journal of Marine Sciences, 2020, 38(2): 26-37.
[8]	ZHANG Zhiyi, XU Dong, HAN Xibin, WANG Yanbing, HU Zhilong, GE Qian, YANG Fanlin. High-precision geomorphological characteristics of the seafloor near the Yap-Mariana Trench [J]. Journal of Marine Sciences, 2020, 38(1): 27-41.
[9]	HAN Zhi-yuan, XIE Hua-liang, QIANG Hai-yang, LI Huai-yuan. Evolution research on subaqueous delta of Liaohe Estuary in recent 50 years [J]. Journal of Marine Sciences, 2019, 37(3): 64-72.
[10]	SU Ze-guo, TANG Yong, LI He, DONG Yan-hui, FANG Yin-xia, WANG Wei-yang, ZHU Zhi-min. The geomorphological features and tectonic evolution in the Northern Seychelles Plateau [J]. Journal of Marine Sciences, 2019, 37(2): 16-27.
[11]	LIU Cong-shu, DING Wei-wei, YIN Shao-ru, FANG Peng-gao, DING Hang-hang. Geomorphology, sedimentary characteristics and controlling factors of submarine canyons in the northern continental slope of the South China Sea [J]. Journal of Marine Sciences, 2019, 37(2): 28-43.
[12]	ZHENG Yu-jun, SHI Lian-qiang, XU Dai-lu, JIANG Zu-yin, GUO Jun-li. Analysis on the rules of spatial and temporal distribution of salt marsh in Yancheng coastal area over the past 30 years and its influencing factors [J]. Journal of Marine Sciences, 2018, 36(3): 57-66.
[13]	SUI Yan, ZAHNG Li, MU Xiao-dong, WANG Zhi-yong, LI Tong, WANG Heng, ZHEN Jia-ning. Coastline change monitoring and analysis with remote sensing in Hainan Island [J]. Journal of Marine Sciences, 2018, 36(2): 36-43.
[14]	HUANG Ri-peng, LI Jia-lin, YANG Lei, HE Gai-li, FENG Bai-xiang. Landform intensity index of artificial construction and its characteristics of spatial pattern evolution in coastal zone of Xiangshangang Bay [J]. Journal of Marine Sciences, 2018, 36(1): 46-57.
[15]	XIAO Rui, JIANG Xue-zhong. Study on defining the river-sea boundary based on B-L curve [J]. Journal of Marine Sciences, 2017, 35(3): 42-53.