An Investigation on Lateral Intrusion Process of Water into Porous Media under Different Upstream Boundary Conditions

抄録

This paper deals with the lateral intrusion process of water into porous media consisting of large grain size, which seems to simulate the storm water storage into pervious road sub-base from a side drainage channel, under constant water level and constant inflow discharge conditions. The common fundamental equations for solid-liquid multiphase flows with the inertia term are used as the basic model. The fundamental characteristics of lateral intrusion process are firstly investigated theoretically using the depth averaged equations with the inertia term and the viscous or turbulent drag force terms in the momentum equation. It is pointed out that there are distinct two power law regions with respect to time in the unsteady intrusion processes. The theoretical results are verified by carrying out the vertical 2-D numerical simulation and simple hydraulic experiment.