蒸发量与土壤湿度和地下通量关系分析公式
(1) 土壤剖面上水分随时间变化的一维模式：
式中，θ为容积含水量；t为时间；K为毛管导水率；S为土壤吸力；Z为地下水埋深。
(2) 地下水垂直通量计算模式：
式中，Z为地下水埋深；S为土壤吸力（或土壤含水量）；Q为地下水通量。
(3) 土壤毛管导水率：
式中，S为土壤吸力；a, b和n为待定常数。
(4) 土壤水分蒸发量：
式中，E为实际蒸发量；
为在一定气象条件下，蒸发层足够湿润时的最大可能蒸发量（即蒸发力）；S为蒸发层内实际土壤水分吸力；
为毛管破裂含水量之吸力；
；Q为地下水垂直向上通量；m和n为大于1的参数。
参考文献
陈科信：蒸发量与土壤湿度和地下通量关系的模式。地理学报，1988，43(2)
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