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用分形理论对洪峰散点序列进行了分析，发现洪峰散点序列在一定尺度范围内表现出了自相似性，初步证明洪峰散点序列是一种分形。提出了用分形理论划分洪水分期的方法，并以雅垄江小得石站洪水分期研究为例。结果显示，用分形法划分的洪水分期和传统的经验方法划分的洪水分期基本一致，但和传统方法相比，新方法的优点较为客观。
The fractal theory is used to analyze the scattered point sequence of the flood peak. It is found that the scattered point sequence of the flood peak exhibits self-similarity within a certain range of scales. It is initially proved that the flood peak sequence is a fractal. A method of dividing the flood staging by fractal theory is proposed. The flood staging of Xiaodateishi Hydropower Station in Ya’luo River is taken as an example. The results show that the flood stages divided by the fractal method and the traditional empirical methods are basically the same, but the advantages of the new method are more objective than the traditional methods.