The present revitalization trend subordinates the usefulness of former adjustments to ecological demands. After the recent flood experiences it is unavoidable that within the frame of these studies also the proposals of flood control measures established on the basis of hydrological analysis with mathematical models, computer technologies and GIS would be solved. The scenario states of changes of economical land use for catchment areas, as well as presumed influences of these changes on hydrological regime, especially on the regime of proposed flow rate, should be respected.