Ground subsidence due to nonlinear flow through deformable porous media

An analytical solution is presented for the problem of time rate of ground subsidence and piezometric pressure distribution caused by a sudden increase in the effective stress due to an instantaneous lowering of the groundwater table in an aquifer-aquitard-aquiclude system of finite thickness, obeying a nonlinear flow law of the type v = Min. Unlike for Darcian flow the degree of subsidence and the nondimensional pore pressure distribution are found to be dependent on both the amount of groundwater fall and the thickness of the deforming medium.

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