seepage rtow Mechanics of seepage flow is not only long historical but also young science. It has been past one and half centuries since Darcy law The grow up of oil industry in 20th promoted the develop of seepage flow. Along with correlative science develops, it is promote seepage flow again. Recently mechanics of seepage flow developed into a new stage along with develop of nonlinear mechanics; the establishment of bifurcate theory and other theory9 Mechanics of seepage flow is not only long historical but also young science. It has been past one and half centuries since Darcy law The grow up of oil industry in 20th promoted the develop of seepage flow. Along with correlative science develops, it is promote seepage flow again. Recently mechanics of seepage flow developed into a new stage along with develop of nonlinear mechanics; the establishment of bifurcate theory and other theory