Rhine basin: Low flow monitoring by the International Commission for the Protection of the Rhine

Hintergrundbild Rheingebiet
Rhine - Basel Rheinhalle
Rhine - Maxau
Rhine - Worms
Rhine - Mainz
Rhine - Kaub
Rhine - Andernach
Rhine - Cologne
Rhine - Lobith
Link to the ICPMS low flow monitoring.
  • Current flow at gauge has not yet fallen below the 2-year NM7Q threshold.
    no / very frequent low flow (Q ≥ 2-year NM7Q)
  • Current flow at gauge has fallen below the 2-year NM7Q threshold, but not yet undershot the 5-year NM7Q threshold.
    frequent low flow (Q < 2-year NM7Q)
  • Current flow at gauge has fallen below the 5-year NM7Q threshold, but not yet undershot the 10-year NM7Q threshold.
    less frequent low flow (Q <5-year NM7Q)
  • Current flow at gauge has fallen below the 10-year NM7Q threshold, but not yet undershot the 20-year NM7Q threshold.
    rare low flow (Q < 10-year NM7Q)
  • Current flow at gauge has fallen below the 20-year NM7Q threshold, but not yet undershot the 50-year NM7Q threshold.
    very rare low flow (Q < 20-year NM7Q)
  • Current flow at gauge has fallen below the 50-year NM7Q threshold.
    extremely rare low flow (Q < 50-year NM7Q)
  • There are no up-to-date flow data available.
    no up-to-date flow data
  • ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  • Trend (water level at gauge):
  • The water level at the gauge has risen more than 10 cm in the last 4 hours.
    rise of more than 10 cm in 4 hours
  • The water level at the gauge has risen more than 5 cm in the last 4 hours.
    rise of more than 5 cm in 4 hours
  • The water level at the gauge has risen / fallen up to 5 cm in the last 4 hours.
    rise / fall up to 5 cm in 4 hours
  • The water level at the gauge has fallen more than 5 cm in the last 4 hours.
    fall of more than 5 cm in 4 hours
  • The water level at the gauge has fallen more than 10 cm in the last 4 hours.
    fall of more than 10 cm in 4 hours

The monitoring of the occurrence of low flow and its classification is carried out by comparing current flows at the gauge with threshold values of the NM7Q (smallest mean flow values of 7 consecutive days) of the reference time series 1961-2010 for statistical return intervals of 2 to 50 years - see ICPR Report No. 248: Inventory of the low water conditions on the Rhine.
With the uniform ICPR low-water monitoring on the entire Rhine, current low-water events can be directly classified in a comparative manner and possible changes in low-water discharges can be detected.
In addition, the water temperature is displayed. Further parameters relevant for water quality and ecology can be found on the Undine information platform, among others here.

Underlying data: Wasserstraßen- und Schifffahrtsverwaltung des Bundes [DE] (Pegelonline) / Rijkswaterstaat [NL] (Waterinfo) / Federal Office for the Environment FOEN [CH] (Hydrological data and forecasts ) / Bundesanstalt für Gewässerkunde.
The time of the water levels / flow rates is given in CET (winter time). No liability or guarantee is assumed for the up-to-dateness, correctness and completeness of the information and data provided.

Water temperature of the Rhine at water quality monitoring sites - raw data -

Weil am Rhein (km 171.4)
Karlsruhe (km 359.2)
Koblenz (km 590.3)
Bad Honnef (km 640.0)
Bimmen-Lobith (km 865.0)

Low flow