【Key words】 saturated-unsaturated; steady-unsteady; seepage; FEM; boundary conditions; possible exit surface; rainfall infiltration; drainage hole; anti-seepage curtain; drainage substructure; seepage in fracture
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在饱和非饱和渗流计算中，非饱和渗流参数的选择至关重要。
The unsaturated seepage parameter is important in analysing saturated, unsaturated seepage.
特别是在岩土工程和水利工程中研究降雨入渗下饱和非饱和水气两相渗流具有重要意义。
It has important meaning for the saturate-unsaturated two phase flow study in raining in rock soil engineering and hydraulic engineering.
采用有限元方法作为数值模拟手段，编制了考虑地表入渗的饱和非饱和渗流有限元计算程序。
Finite element method is used as numerical simulation means and a program used to calculate saturated unsaturated seepage due to surface infiltration is worked out.
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