A simple scaling model for extreme rainfall
A simple scaling model for extreme rainfall
复制标题
极端降雨的简单比例模型
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
G. Pegram
中科院分区：
文献类型：
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作者：
M. Menabde;A. Seed;G. Pegram
将简单尺度假设应用于降雨的强度-历时-频率(IDF)描述。结果表明，年最大平均雨强序列的累积分布函数在30分钟至24小时的范围内具有简单的标度性质，在某些情况下为48小时。这一行为是通过检查矩的标度特性和与数据拟合的极值分布的参数标度来证明的。给出了反映标度行为的IDF关系的简单解析公式。一旦为一个地区的一个或一组量规获得了定标参数，该公式就可以直接根据从每日数据分析获得的信息来计算选定重现期和持续时间短于一天的降雨量。
The simple scaling hypothesis is applied to the intensity‐duration‐frequency (IDF) description of rainfall. It is shown that the cumulative distribution function for the annual maximum series of mean rainfall intensity has a simple scaling property over the range 30 min to 24 hours and in some instances to 48 hours. This behavior is demonstrated through an examination of the scaling properties of the moments and the scaling of the parameters of an extreme value distribution fitted to the data. A simple analytical formula for the IDF relationship is proposed, which embodies the scaling behavior. Once the scaling parameter has been obtained for a gauge or set of gauges in a region, this formula enables the calculation of rainfall amounts, of a chosen return period and duration shorter than a day, directly from the information obtained from the analysis of daily data.