History and Results of the Hydrological Co-operation of the Countries Sharing the Danube Catchment (1971-2008).- The Danube River and its Basin Physical Characteristics, Water Regime and Water Balance.- Palaeogeography of the Danube and Its Catchment.- Danube River Basin Coding.- Characterization of the Runoff Regime and Its Stability in the Danube Catchment.- Coincidence of Flood Flow of the Danube River and Its Tributaries.- Basin-Wide Water Balance in the Danube River Basin.- Thermal and Ice Regimes of the Danube River and Its Tributaries.- Sediment Regime of the River Danube (1956-1985).- Training of the Danube River Channel.- The Fords of the Danube.- Forecast Uncertainties in the Operational Flood Forecasting of the Bavarian Danube Catchment.- Sarib.