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Waters Protection Ordinance
(WPO)

English is not an official language of the Swiss Confederation. This translation is provided for information purposes only and has no legal force.

of 28 October 1998 (Status as of 1 January 2021)

Art. 41 e Serious harm due to hydropeaking

There is ser­i­ous harm to in­di­gen­ous flora and fauna and to their hab­it­ats due to hy­dropeak­ing where:

a.
the flow rate for up­surge is at least 1.5 times great­er than for down­surge; and
b.
the site-spe­cif­ic quant­ity, com­pos­i­tion and di­versity of the plant and an­im­al com­munit­ies are changed to their det­ri­ment, in par­tic­u­lar be­cause reg­u­larly and in an un­nat­ur­al man­ner fish are run ashore, fish spawn­ing grounds are des­troyed, aquat­ic an­im­als are washed away, tur­bid­ity arises or the wa­ter tem­per­at­ure is altered in an un­law­ful man­ner.