陕西省暴雨偏态系数分析

Coefficient of Skew Analysis of Shaanxi Provincial Rainfall

采用全省126~633个长系列10 min、20 min、60 min、3 h、6 h、12 h、24 h和3 d 8个标准历时的暴雨资料,按照统一的方法并最优适线原则,计算全省8种历时点暴雨参数;分析偏变比在地域上的分布和随历时的变化规律,并与采用的3.5值计算成果进行比较;利用线性分析对与各参数之间的关系进行探讨。研究表明,《陕西省水文手册》修编中点暴雨频率计算偏变比统一采用3.5是合理的。

The application of 126 -633 long series of 10 min, 20 min, 60 min, 3 h, 6 h, 12 h, 24 h and 3 d, 8 standard rainstorm data are taken. In accordance with the unified approach and the principle of the best line, rainfall material, the article calculates the eight kinds of rainstorm parameters of the province and analyzes the deviation ratio the changing law in the geographical distribution and calendar time, then compared with the calculated value of 3.5. The relationship among the parameters is discussed by linear analysis. The research announcement is that it is reasonable to calculate the deviation ratio of the rainstorm frequency than the uniform use 3.5 value in the revision of ＂Shaanxi hydrologic handbook＂.