基于动态权重的水文时间序列相似性分析方法

水文时间序列相似性分析对于洪水预报、防洪调度等具有参考作用.针对洪水特征的关注重点随研究问题的不同而变化,构建了由过程形态和特征值组成的相似指标体系和加权综合相似性度量指标,提出了基于动态权重的相似性分析方法.引入混合交叉赋权法的原理,在不同研究问题中对相似指标赋予不同权重,然后利用相似指标结合权重查找出相似水文时间序...

Similarity Analysis Method of Hydrological Time Series Based on Dynamic Weight

The similarity analysis of hydrological time series plays an important role in flood forecasting and flood.control operation.The focus on flood characteristics varies with different research issues.The similarity index system composed of process shape and characteristic value and the weighted comprehensive similarity measurement index were constructed.A similarity analysis method was proposed based on dynamic weight.The principle of hybrid cross weighting method was introduced to give different weights to similar indexes for different research problems.The similar indexes combined with weight were used to find out similar hydrological time series.Taking the similarity analysis of historical flood process of Beibei station in Jialingjiang River as an example to verify the method,the results show that the proposed method can effectively identify similar floods,which is feasible in practical problem.