Forecast of river water levels for 2 to 4 days for 20 stations on the Danube, Tisza, Sava and Morava and hydrological situation and tendencies for small and medium watercourses in the Republic of Serbia. It is updated once a day. FEATURES: - water level for the current day for the Danube, Tisza, Sava and Morava - change of river water level, water flow, water temperature, border of regular and emergency flood defense - hydrological situation and tendencies for small and medium watercourses - r