中文摘要：

针对现有集对理论径流分类差异性细化不全面的现象,全面考虑径流5类丰枯分级标准的同-性、轻度差异性、中度差异性、重度差异性和对立性5种特性,建立五元集对分析法对水库流域径流丰枯进行分类研究,并与频率分析法和四元集对分析法分类结果进行对比.实例研究结果表明：所研究的水库流域年径流丰枯类型交替出现,特丰年、丰水年、平水年、枯水年和特枯年发生的概率分别为4%、9%、45%、33%和9%,平水年居多,其次为枯水年;水库流域45年水文序列中,后23年的水文极值年出现频率较前22年有较大增加,变化环境下的水文极值现象在该流域有所体现;五元集对分析法全面考虑集对理论差异性,能充分体现流域径流丰枯类型,较其余方法更能反映年径流实际丰枯,在水文水资源分析计算中有-定的推广应用价值.

英文摘要：

In view of the inadequate classification of runoff in present set pair theory, a Five-element Set Pair Analysis Method which comprehensively considered id en tity, mild , moderate and serious differences and antagonism according to the five - level classification of runoff was established to study the annual runoff classification in reservoir watershed and compared with the Frequency Analysis and Four-element Set Pair Analysis. The case study shows that the incidence of extra high flow year, high flow year, normal flow year, low flow year and extra low flow year is 4 % , 9 % , 4 5 % , 3 3 % and 9% , respectively. Namely, normal flow year is the majority; that the hydrological extreme year appeared more frequently in the last 23 years than that appeared in the first 22 year s, and the extreme hydrological phenomenon under the changing environment reflected in the reservoir watershed basin. The Five-element Set Pair Analysis can fully describe the types of runoff because it comprehensively considered the difference of the Set Pair Analysis theory. Compared with other methods, the Five-element Set Pair Analysis is better in reflecting the actual situation of runoff, and it is worthwhile to be promoted in the analysis and calculation of hydrology and water resources.