VERSTECKT HINTER DEN MITTELWERTEN. DIE VARIABILITAT DES ABFLUSSREGIMES

The present paper is focused on the deviation of single-year runoff patterns from the long-term mean flow regime. The extent of this interannual variability of monthly discharges is analysed on the basis of Swiss flow data. A new statistical parameter to quantify this variability is introduced. The results clearly show that the types of flow regimes currently used in Switzerland are excellently suited to estimate the inter-annual runoff variability of a basin which consists of two components: the year-to-year-fluctuation of the seasonal runoff pattern and the changes in the mean annual runoff.