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Basis for determining Q347 flow rate

The Water Protection Act specifies how appropriate residual flows can be determined. This applies to new water withdrawals and also to existing withdrawals for which concessions have to be renewed. Anyone who withdraws water from a permanent (non-seasonal) watercourse - for power generation, irrigation or cooling purposes - requires a licence. This will only be granted if appropriate residual flows are maintained in the river- or streambed. The residual flow regulations are only applicable to new water withdrawals and to existing withdrawals when a concession expires and has to be renewed. The Q347 discharge is one of the fundamental parameters for setting minimum residual water flow. Measurements or suitable estimation methods are required to determine the Q347. The map “Grundlagen zur Bestimmung der Abflussmenge Q347” combines measured and modelled data. The modelled data represents rough estimates which can be improved by application of more advanced methods. In general, an estimate obtained in this way must be checked by performing a short-term measurement.

Data and Resources

Additional information

Identifier
83e6752a-e668-4ade-9ad5-fd9d555d35da@bundesamt-fur-umwelt-bafu
Title for URL of the dataset
grundlagen-zur-bestimmung-der-abflussmenge-q347
Schedule the publication of the dataset
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Issued date
January 1, 2000
Modification date
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Conforms to
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Update interval
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Temporal coverage
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Publisher Information
Bundesamt für Umwelt / Abteilung Hydrologie
Contact points
hydrologie@bafu.admin.ch
Languages
  • English
  • German
  • French
  • Italian
Url
https://www.bafu.admin.ch/bafu/de/home/themen/wasser/zustand/wasser--methoden/bestimmung-der-abflussmenge-q347.html
Relations
Spatial
Schweiz
Related datasets
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Documentation
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Keywords
Terms of use
https://opendata.swiss/terms-of-use#terms_open
Metadata Access
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