大暴雨雨滴平均谱的研究

RESEARCH ON THE MEAN SPECTRUM OF THE RAIN STORM

摘要: 根据不同地区的许多观测表明,雨滴平均谱的极限状态趋于指数形式1,2。1984年8月10日至10日受8407号台风减弱为低压的影响,长春降了大暴雨,降水量为112.3mm,从10日06时30分开始,用滤纸色斑法,每隔5分钟观测一次雨滴谱,到11日04时,共取雨滴谱259份。本文根据这次层状云大暴雨雨滴谱资料,研究了指数形式雨滴谱ND=N0e-λD的参数N0和λ的确定,并对不同方法拟合的经验公式进行了误差计算,选出这次大暴雨的最佳雨滴平均谱的经验公式。

Abstract: Based on the data of raindrop spectra of stratiformis rain storm in Changchun on 10-11,Aug. 1984,the parameters N0 and λ, for raindrop size distribution of the form ND=N0e-λD were researched. The errors of different ways which got N0 and λ were calculated. The results show that N0 and λ as a function of I are the best way to establish raindrop size distribution.