Parameter’s Sensitivity in Water Storage Modelling for Unsaturated Soils

In many branchs of soil science, hydraulic engineering and agriculture, modelling of water infiltration in unsaturated soil is a major problem. The study of two-phases flow in unsaturated zones has started since the announcement of the famous law of Darcy for infiltration flow (1856). This law was extended by Buckingham (1907) to some infiltration flows in unsaturated porous media. The resulting equation, combined with the mass conservation law, involves a strong non linearity in some terms which generates some numerical disruptions that affect the simulation results.