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为研究水库汛期分期基本原则,以构皮滩水库控制流域洪水为例,分别采用模糊集合分析法和圆形分布法研究了水库汛期分期问题。模糊集合分析法确定的主汛期为6月28日～8月7日;圆形分布法确定的主汛期不考虑洪水量级为6月2日～8月12日,考虑洪水量级为6月4日～8月5日;后者考虑了个别出现时间较早洪水,偏保守,且洪水取样时段对主汛期划分影响较小,洪水取样量级对主汛期划分有一定影响。水库入汛判断标准宜以模糊集合分析法为基础,汛期分期宜以圆形分布法为准。
In order to study the basic principles of flood season staging in reservoir, taking flood control of watershed in Goupitan Reservoir as an example, the staging of flood season in reservoirs was studied by fuzzy set analysis and circular distribution respectively. The main flood season determined by fuzzy set analysis is from June 28 to August 7; the main flood season determined by the circular distribution method does not consider the flood level from June 2 to August 12, considering the flood level as June From the 4th to the 5th of August, the latter considered the earlier occurrence of some floods, the more conservative, and the sampling period of the flood had little effect on the division of the main flood season. The magnitude of the flood sampling had a certain impact on the division of the main flood season. Judging criteria of reservoir flood should be based on fuzzy set analysis method, flood season staging should be based on circular distribution method.