抄録
The Richards equation is adopted as a fundamental equation for the solution of unsaturated infiltration flow. At the first stage, a new boundary condition has been introduced and its accuracy has been cross checked with experiments. At the second stage, on the lumping process of non-dimensional form of Richards equation, a compensation factor has been proposed to equalize the semi-lumped equations. Finally, the relation between storage and discharge has been achieved by fully lumped equations.
