集对分析法在云南径流丰枯分类中的应用

The Application of the Set Pair Analysis Method to Annual Runoff High Flow and Low Flow Classification in Yunnan

年径流丰枯分类既取决于年径流本身大小,又与年内时程分配的特点有关,以云南省七星桥站为例进行实例研究,利用集对分析法,建立径流丰枯状态的分级标准,用集对的联系度描述年径流丰枯状态的同异反程度。集对分析法既反映了年径流的大小,又兼顾了径流的时程分配信息,分类结果较常规法更实际、客观。

The annual runoff high flow and low flow classification not only depends on the size of the annual runoff flow but also on the characteristics of the time duration distribution in a year. Taking the Qixingqiao Hydrological Station in Yunnan Province as an example in the study, the set pair analysis method was used to establish the standards for classification of the runoff high flow and low flow states and the set pair relationship was used to describe the degree of similarity and difference of the annual high flow and low flow states in the paper. The set pair analysis method not only reflects the size of the annual runoff, also obtains the information on distribution of time duration of the runoff. The classification results proved satisfied, practical and objective.