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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/hess-2019-518
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2019-518
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 21 Oct 2019

Submitted as: research article | 21 Oct 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Hydrology and Earth System Sciences (HESS).

Anthropogenic Influence on the Rhine water temperatures

Alex Zavarsky and Lars Duester Alex Zavarsky and Lars Duester
  • Federal Institute of Hydrology, Department G4- Radiology and Monitoring, Koblenz, Germany

Abstract. River temperature is an important parameter for water quality and an important variable for physical, chemical and biological processes. River water is also used by production facilities as cooling agent.We introduce a new way of calculating a catchment-wide air temperature and regressing river temperature vs air temperatures. As a result the meteorological influence and the anthropogenic influence can be studied separately. We apply this new method at four monitoring stations (Basel, Worms, Koblenz and Cologne) along 5 the Rhine and show that the long term trend (1979–2018) of river water temperature is, next to the increasing air temperature, mostly influenced by decreasing nuclear power production. Short term changes on time scales < 5 years are due to changes in industrial production. We found significant positive correlations for this relationship.

Alex Zavarsky and Lars Duester
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Status: open (until 16 Dec 2019)
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Alex Zavarsky and Lars Duester
Alex Zavarsky and Lars Duester
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Short summary
River water temperature is an important parameter for water quality and an important variable for physical, chemical and biological processes. River water is also used as cooling agent by power plants and production faclilities. We study long term trends in river water temperature and correlate them to meteorological influences as well as power production or eceonomc indexes.
River water temperature is an important parameter for water quality and an important variable...
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