Under Article 4 Waters Protection Act, the flow rate Q347 is the flow rate which, averaged over ten years, is reached or exceeded on an average of 347 days (95th percentile) per year and which is not substantially affected by damming, abstraction or inflow of water.

Last modification 13.03.2021

Top of page


Office of the National Centre for Climate Services NCCS
Federal office of meteorology and climatology MeteoSwiss
Operation Center 1
P.O. Box
CH-8058 Zurich-Airport

Angela Michiko Hama


Print contact