Abstract: Interface element such as Goodman’s interface element is often used in consolidation analysis by FEM. With shear stiffness and normal stiffness, Goodman’s element can model the mechanical property of the interface. However, how to simplistically simulate its seepage characteristics deserves further investigation. Similar thing occurs with seepage along geosynthetics. The authors resolved the problems in a simple way, and verified it with a case analysis. It is thought that the method is not only suitable for consolidation problem, but also very useful in general seepage analysis.