棉花滩水库分期设计洪水的研究及应用

结合棉花滩水库汛期洪水的变化规律,在分析年最大值法和分期设计洪水各自优缺点的基础上,采用成因分析法、变点分析法、数理统计法研究了棉花滩水库汛期的分期规律,并采用分期频率组合方法研究年最大值法频率分析计算结果与分期年最大值法的量化关系。结果表明,三种方法确定的棉花滩水库汛期分期是一致的,即5～6月为主讯期,7～8月为次讯期。

Research Into Design Flood by Stages for Reservoir Mianhuatan and Its Application

On the base by analyzing respective virtue and defect of the design flood by stages and annual maximum design flood, the paper analyzes the optimal relationbetween stages and annualmaximum design floodof the Mianhuatan reservoir, which uses the origin analytic method,mathematical statistics method and average value change-point analytic method, and from the frequency combination principleof design floodes, discuss the optimal relation between stages and annualmaximum design flood. Thispaper has certain theoretical significance and broad practical application value.The result indicated that it is accordant to determine the flood season of Mianhuatan reservoir with the three methods, namely May to June is primarily flood seasons and July to August is the inferior flood seasons.