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对中国 1 60个水库年最高水位纪录资料的统计特性进行了分析 .研究结果表明 ,水库年最高水位为独立随机变量 ,可用三参数 (均值、Cv 和 Cs)对数正态分布描述 ,其参数与水库特性和水文地区有关 ,宜采用概率权重矩法估计。建立的多元回归方程对工程应用是有益的。在设计标准期内 ,水库年最高水位的分布可近似表示为正态分布 ,这对水库大坝结构安全设计的可靠性估计是十分有用的
The statistical characteristics of record data of the highest water level of 160 reservoirs in China are analyzed.The results show that the highest water level in the reservoir is an independent random variable and the lognormal distribution can be described by three parameters (mean, Cv and Cs) Relevant to reservoir characteristics and hydrological areas, the probability weight moment method should be used to estimate. The established multiple regression equation is useful for engineering applications. During the design standard period, the distribution of the highest annual water level in a reservoir can be approximated by a normal distribution, which is very useful for estimating the reliability of dam safety design in a reservoir