论文部分内容阅读
利用南宁气象站1953—2014年共62a的逐分钟降雨资料,建立南宁市暴雨强度公式和重现期2a历时30、60、90、120、150、180min以5min为单位时段的设计暴雨雨型。结果表明:(1)P-Ⅲ分布曲线对南宁市各历时降雨量的拟合效果最好。(2)采用P-Ⅲ分布、最小二乘法参数组合方法计算南宁市暴雨强度公式误差较小。(3)历时30min的设计暴雨雨型雨峰位置处于整场降雨过程的1/2分位,历时60-180min的雨峰位置基本处于整场降雨过程的1/3分位。雨峰处降雨强度随着历时的增加而增加。
Based on the minute-by-minute rainfall data of Nanning meteorological station from 1953 to 2014, a rainstorm model was designed for rainstorm intensity of Nanning city and the period of recurrence 2a was 30,60,90,120,150,180min in 5min. The results show that: (1) The P-Ⅲ distribution curve has the best fitting effect on the rainfalls of various periods in Nanning. (2) The P-Ⅲ distribution and the method of least squares method to calculate the formula of rainstorm intensity in Nanning are less error. (3) The duration of rainstorm rainstorm peaked at 30min was in the second half of the whole rainfall course, and the rainstorm peak lasting 60-180min was almost 1/3 of the rainstorm. Rainfall rainfall intensity increases with time.