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受气候变化、人类活动等诸多因素影响 ,水文情势产生变异问题 ,以灰色差异信息理论为基础 ,建立差异信息相对测度体系和最优信息二分割模型 ,模型可判别水文时间序列的变点存在、位置并量化变异度。选用珠江三角洲网河区洪水资料进行水文变异分析 ,推断点清晰、变异关系明确 ,为水文时间变异点的推估提供了新的途径。
Due to climate change, human activities and many other factors, the variation of hydrological conditions is a problem. Based on the gray difference information theory, a two-part model of relative information of difference information and optimal information is established. The model can identify the change points of hydrological time series. Position and quantify the degree of variation. Hydrology variation analysis was conducted using the flood data in the area of the Pearl River Delta and the river was clear. The deduced points were clear and the variation was clear. This provided a new way to estimate the time variation of hydrology.