The planned project has two main objectives:1. Adapting flood retention reservoirs, on the Hungarian and Ukrainian sides, to one uniform system. Further development and updating of the Ukrainian complex flood-prevention development programme developed in 2001. Specifying the technical parameters of flood retention reservoirs, further development of planned technical solutions. 2. Developing the Hungarian-Ukrainian hydrological forecasting system. Further development of the flood forecast and information system covering the Upper-Tisza river basin above Tokaj, as the result of which data and information will be accessible on-line to every concerned party and institution. 2.1 Developing such a common IT system, which satisfies the specific and common demands of local, central, and other nations’ (Romanian, Slovakian) labor organizations. 2.2. Common further development of the flood forecast system (Ultra short-term, 1-6 hours quantitative precipitation forecast (Auto-NowCasting) and continuous hydrological forecast of the Tisza river basin above Tokaj. Expected Results: Laying the technical foundation for the parameters of reservoirs planned and under implementation in both countries. Enhance flood safety in the entire Upper-Tisza region. Enhance time-allowance necessary for flood prevention with the further development of a modern hydrological forecasting system.