HYDRODYNAMICAL MODELLING USED IN FLOOD PLAIN ZONING AND DESIGNATION - PLANS AND REALITY DURING THE FLOOD IN 2002 IN THE CZECH REPUBLIC

摘要

The paper is dealing with applications of detailed mathematical models focused on designation of flood zoning at particular reaches and provides an analysis of general impacts on flood protection measures in the whole river basin. The authors want to contribute to the unsolved problems of continuing urbanization and economic growth in the areas exposed to floods, associated with further increase of population and related danger of potential economic and cultural damages. It is necessary to designate these areas as flood plain areas or areas exposed to special floods and to regulate adequately their use. This task is impossible to fulfill without strong and well tested Hydroinformatics tools as DEM, hydrodynamic models and GIS tools. For making strategic decisions concerning the implementation and extent of flood protection measures, it is necessary to know areas exposed to flood danger (define active and passive zones in flood plain areas) and characteristics of natural and special floods (flood hydrographs, duration of floods, flow velocity in flood plain areas, etc.).