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Salmon are on course for extinction. The move to free Irish rivers needs to gather momentum

20.12.2020 Europe’s rivers fragmented by one million barriers A study published in the scientific journal “Nature” with the participation of IGB shows: Europe has some of the most fragmented rivers in the world. On average, there is about one barrier per 1.4 kilometres of stream, in Germany even two barriers per kilometre. Small transverse structures with an impoundment height of less than two metres account for the lion’s share. The study also shows opportunities for reconnecting streams and rivers. The study, led by researchers at Swansea University’s ...

European rivers are fragmented by over one million barriers Healthy rivers are flowing rivers, say researchers. Europe’s main rivers coloured by basins. Thickness is proportional to stream order. Credit: EEA, Copenhagen, 2012. Free-flowing rivers are crucial harbingers and guardians of life. They not only provide humans with clean water for drinking, agriculture, and other economic activities, they also house around 40% of the world’s species of fish. However, Europe’s rivers have become increasingly constricted due to dams, as well as many smaller, less visible barriers that, neverthe...