The pearson distribution and the logarithmic normal distribution are used respectively to fit the asymptotic distributions of yearly maximum of the daily precipitation in chengdu during the period between 1951 and 1999 摘要利用1951 ~ 1999年成都日降水量年极大值的记录，通过统计推断，找出了成都日降水量年极大值遵循的渐近分布。
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The paper in the context of the statistic - dynamic analyses the heterogeneity of spatial distribution of the precipitation . the generality of the spatial probability distribution model of the precipitation was explored 本文从陆面过程的物理机制出发，利用统计? ?动力学方法，阐述了中国区域的月降水量和日降水量的空间分布非均匀性，并寻求适宜的空间分布概率密度函数进行描述。
