The phreatic evaporation intensity at groundwater depth of zero meter is contained in the commonly used Empirical Formulae of Phreatic Evaporation,and it s thought that it can be replaced by the evaporation intensity of water surface.However,differences in evaporation quantity calculation will be caused by the different water-bearing pores and the different exchanging space directly with atmosphere for different types of soil.This paper analyzed and compared the two conditions that when E0 was the evaporati
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