随着土壤的通气性和渗透、排水率的改善，土壤有效水分增加。
With improvement of aeration, infiltration and drainage percent, the availability of moisture soil increases corresponsively.
提出了隧道排水率的概念，分析了隧道排水率与衬砌外水压力之间的关系。
The concept of tunnel discharge ratio is put forward; and the relation between tunnel and external water pressure on lining is analyzed.
在给定的饱和度下，未固结的多孔介质的非润湿渗透率高于排水渗透率。
At a given saturation nonwetting permeabilities for an unconsolidated porous medium are higher than the drainage permeabilities.
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