Abstract
This paper described new generalized governing equation associated with groundwater behavior considering physical properties of wide range of porous media from soil material, soft rock to hard rock based on Biot's two phase mixture theory. Through the investigation of physical meaning of each term constituting the generalized equation, physical effect on the feature of groundwater-flow by means of interaction between volumetric strain of porous media and pore water was made clear, and from an engineering viewpoint, a new criterion is proposed, which clarifies the applicable methods to various type of design of seepage problem.
