中文摘要：

年径流丰枯不仅与年径流大小有关,而且与径流的时程分配有关。传统径流分类方法仅考虑到年径流大小,而未考虑时程分配信息。以长江寸滩水文站55 a逐月流量资料为依据,选用集对分析法,以分类集合与分类标准集合构造集对,用联系度描述集对的关系并进行年径流丰枯分类。提出了联系度、联系度元数K及联系数的确定方法。研究表明,集对分析法较常规方法更能反映年径流丰枯实际,在水文水资源分析计算中具有一定的推广应用价值。

英文摘要：

The dry - wet of annual runoff is related to the amount of annual runoff and its distribution within a year. The traditional dry - wet classification methods only consider the amount of annual runoff but ignore the distribution. On the basis of the monthly runoff data at Cuntan Hydrological station for 55 years, the set pair analysis method （SPA） is adopted to construct the set pair by the classification set and standard set; the relationship of the set pair is expressed by the connective degree, and the annual runoff classification is conducted. The method for determining the connection degree, the dimension of connection and the numbers of connection degree is put forward. The results show that the amount of runoff and its distribution has been fully considered by SPA, so the method is worth popularizing in the field of hydrological calculation.