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讨论了次降雨入渗补给系数的定义及其在地下水资源计算评价中的作用；依据统计理论，评价了次降雨入渗补给系数的一般统计特征；在此基础上，进行该系数的确定性模型研究及其相应的检验，说明了次降雨入渗补给系数的实际分布和伽马模型及威布尔模型具有很好的一致性．
The definition of sub-rainfall infiltration recharge coefficient and its role in the calculation and evaluation of groundwater resources are discussed. According to the statistical theory, the general statistical characteristics of sub-rainfall infiltration recharge coefficient are evaluated. On this basis, the deterministic model The study and its corresponding tests show that the actual distribution of sub-rainfall infiltration recharge coefficient is in good agreement with the gamma model and Weibull model.