It is an experimentally confirmed fact that a soil substantially changes its material properties when subjected to external loading. Apart from that, the soil, when subjected to a certain loading history, has the ability to memorize the highest level of loading mathematically represented by over-consolidation ratio, and so called initial void ratio. The paper presents basic resources for the evaluation of the numerical codes for soils affected by floods. One of them is research project FLAMIS describing the flood in 2002 in the region of the South Bohemia. All substantial influences, such as suction, piping etc., can change the over consolidation and porosity inside the subsoil. This affects the upper structure due to collapses of the soil skeleton following by the stress redistribution. Time dependent progress of influence zone can be used for the fast estimation of this phenomenon in the subsoil. Numerical examples are carried out using professional code GEO 5 FEM from FINE Ltd.