Natural water balance for the whole of Switzerland and important large catchment areas

The water balance includes the main components of the water cycle. The FOEN calculates the water balance for Switzerland and its large river basins every year. The water balance includes the components of the water cycle relevant to a specific analysis area. The components are quantified by simple balance equations. The level of detail is dependent on the size of the basin under consideration. The classic water balance equation is often sufficient for large river basins: Precipitation = runoff + evaporation +/- storage changes