本文指出了皮尔逊三型分布用于波高频率分析计算所存在的缺点;论述了应用极值广型分布原理计算沿海港湾工程设计的波高频率;提出了新的特大值处理方法。 一 用皮尔逊三型分布计算港湾工程的波高频率分布有下列主要缺点: 第一,皮尔逊三型分布有均值、C_v和C_s三个参数。我国大多数测站只有十几年波高连续观测资料,每年选取一个最大波高,则系列内只有十几个数据。用这样短的系列计算波高的均值及 This paper points out the shortcomings of Pearson’s three-type distribution for wave-height frequency analysis and calculation; discusses the application of extremum wide-type distribution theory to calculate wave-height frequency of coastal harbor engineering design; and proposes a new super-large value processing method. A Pierson three-type distribution of harbor engineering wave frequency distribution has the following major shortcomings: First, the Pearson three distribution mean, C_v and C_s three parameters. Most of our stations only have a continuous wave observation data of more than ten years and choose a maximum wave height every year, only a dozen data in the series. Use such a short series to calculate the mean and