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

GUO Feng-xia; QIU Jian-li; WU Song-hua; GUO Guo-ming

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Journal of Marine Sciences ›› 2012, Vol. 30 ›› Issue (4) : 37-45.

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

GUO Feng-xia¹, QIU Jian-li¹, WU Song-hua², GUO Guo-ming³

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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.

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muddy tidal flat / topographic change / the EOF analysis

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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

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