We considered in Chapter 5 the flow of fluid (water) through porous geologic materials, commonly called seepage, when the skeleton of the material is assumed to be rigid. In practice, however, it is common that the deformations in the soil skeleton take place simultaneously with fluid flow through the pores, and there occurs relative motion between fluid and solid (soil). In other words, the deformation and flow are coupled and influence each other. One of the specializations of water flow through porous and deforming geologic medium is called consolidation in the geotechnical literature [1-3].