If the infiltration intensity is less then the saturated permeability coefficient, the surface soil finally reaches to an unsaturated infiltration stage instead of saturated infiltration stage.
当降雨强度小于土体的饱和渗透系数时，表层土体达不到饱和状态，最终的稳定入渗只能达到一个非饱和入渗状态。
For complexity and diversity of unsaturated soil behaviors, there lies a great difference in permeability characteristics between unsaturated soil and saturated soil.
由于非饱和土的复杂性和多变性，其渗透特性明显不同于饱和土，并且试验难度较大。
And damp in saturated soil was larger than that in unsaturated one.
对于同一类土，饱和土体阻尼作用大于非饱和土体。
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