Miljøtiltak i vassdrag med erfaringer fra Nord-Norge / Remedial measures in watercourses with experiences from northern Norway
Hydropower development has reduced the discharge in many Norwegian rivers and watercourses. This in turn, has affected fish communities and the biological diversity of these rivers in a negative way. Sills have been used extensively as remedial measures in regulated rivers for a long time. More varied measures are used today such as adjusting the river course in different ways to the existing discharge conditions. Remedial measures aimed at enhancing conditions for fish and biological diversity are also applied in channelized rivers with flood protection works. Experience from projects in northern Norway show that rebuilding old flood protection works and reopening old floodways and meander bends can be important remedial measures.