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本文应用经验特征函数对杭州湾北岸金汇港潮滩资料进行统计分析,用对应于3个最大特征值的3个特征函数来说明潮滩剖面的变化,即用主要反映悬沙影响的距平平均潮滩函数,主要反映推移质泥沙影响的距平准滩脊函数和距平准滩槽函数的线性组合来表示潮滩的变化,3个函数均具有明显的年周期变化的特点,能较客观地描述整个潮滩剖面随时间变化的规律,应用经验特征函数对泥质潮滩进行定量的计算和分析,是一种行之有效的方法。
In this paper, statistical analysis of tidal flat data of Jinhui Port on the north bank of Hangzhou Bay is made by using the empirical eigenfunction function. Three eigenfunctions corresponding to the three largest eigenvalues are used to illustrate the changes of tidal flat section, that is, the anomalies mainly reflecting the influence of suspended sediment The average tidal flat function, which mainly reflects the linear combination of the quasi-flat beach ridge function and the quasi-tidal flat function, implies the change of tidal flat. The three functions all have obvious characteristics of annual cycle variation. The objective of this paper is to describe the law of the whole tidal flat section changing with time objectively. It is an effective method to calculate and analyze the muddy tidal flat quantitatively by using the empirical eigenfunction.