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为了了解吉林省降水资源的时空分布,本文用相似分区法,把全省分为三个降水区,并对各区降水资源进行评价。由于年降水量为常态分布,4—9月降水量经柯尔莫哥洛夫——斯米尔诺夫检验,证明也呈常态分布,所以根据常态分布求算出各降水区的理论保证率。本文最后用降水距平值作出各区降水量的理论保证率曲线,可以查找全省各站各级降水保证率。
In order to understand the spatial and temporal distribution of rainfall resources in Jilin Province, this paper divided the province into three precipitation areas using similar zoning method and evaluated the precipitation resources in each area. As the annual precipitation is the normal distribution, April-September precipitation by the Kolmogorov-Smirnov test proved normal distribution, so calculated according to the normal distribution of the theoretical rate of each rainfall area. At the end of this paper, we use the anomaly value of precipitation to make the theoretical guarantee rate curve of precipitation in each area, and we can find the precipitation guarantee rate at all levels of the province.