The Hydrology Division of the Swiss Federal Office for the Environment is operating temperature monitoring stations at more than 80 river sites. In addition to interannual temperature cycles, different diurnal variations can be observed. Water temperature data is displayed in real-time (hourly updates). Therefore the ranking of the stations may change.
http://storymaps.geo.admin.ch/storym...ymap4/?lang=en
http://storymaps.geo.admin.ch/storym...ymap4/?lang=en