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中文摘要：
水文典型年是水文计算重要的成果之一。现行的水文典型年的选取方法主要针对单一水文站点的水文时间序列，并不适合应用于由多个支流组成的复杂流域，特别是在各支流间的水文情势不同步的情况下，现行方法的局限性更加明显。基于层次分析和集合理论，从实际出发，提出层次交集法，即首先选取一系列准典型年，再从准典型年中确定研究区域的典型年。通过实例研究验证了该方法的有效性，也表明该方法对水文计算理论和实践具有重要意义。
英文摘要：
Hydrological typical year is one of the important achievements of hydrologic calculation. The current method with typical year selection mainly aims at one single hydrological series, which is not suitable for a complex basin with multi-branches. When hydrologic regime of different tributaries is not coordinate, the limitation of current method is more obvious. Based on hierarchy analysis and set theory, according to the experience in practice, this paper put forward the hierarchical intersection method（HIM）, i. e. a series of quasi-typical years are selected firstly, and then the typical year of the study area are identified from quasi-typical years. Finally, the case study successfully verified the effectiveness of the method. The results show that the method is great im- portance to hydrological calculation theory and practice.
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