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以一定洪涝指标建立的淮河流域近五百年洪涝变化序列为基础，采用分形理论和方法，分析了淮河流域洪涝变化的分形结构特征；计算了淮河流域不同等级洪涝序列的信息分维及其随时间的变化。结果表明，淮河流域洪涝序列是一种极不规则的Ｃａｎｔｏｒ集合；信息分维与洪涝发生的频度呈反相关关系，即洪涝程度越重，信息分维值越低，所反映的气候层次相对越高。信息分维及其变化有望成为时间序列变化趋势和气候层次的诊断指标。
Based on the series of floods in the Huaihe River Basin established by some flood indicators in recent 500 years, the fractal theory and method were used to analyze the fractal features of the flood changes in the Huaihe River Basin. The fractal dimension of floods in Huaihe River Basin was calculated. Time changes. The results show that the flood sequence in the Huaihe River Basin is a very irregular Cantor set. The information fractal dimension is inversely correlated with the occurrence frequency of floods. That is, the heavier the flood is, the lower the fractal dimension of information is, The higher. The information fractal dimension and its change are expected to become the diagnostic indicators of the time series and climate level.