ABSTRACT:Data from 100 stations were used to prepare a generalized characterization of the extremely long dry day sequences in the United States. Maps are presented showing the magnitude of the two‐year, dry day sequences for 1 mm threshold and the coefficient of variation of the items used in the extreme value analysis. For the United States, the average coefficient of variation for dry periods is 30 percent as compared with that for maximum 24h rainfalls which is 37 percent. An example is presented for computing the longer return period
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机译：摘要： 来自 100 个站点的数据用于准备美国极长干日序列的广义表征。图中显示了 1 mm 阈值的两年旱日序列的大小以及极值分析中使用的项目的变异系数。对于美国来说，干旱期的平均变异系数为30%，而最大24小时降雨量的平均变异系数为37%。给出了一个计算较长回报期的示例
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