Karlstad University, Hudiksvall municipality, the county board in Gävleborg and Dam Removal Europe are arranging an international seminar on dam removal in Hudiksvall, Sweden, 24-26 September 2018. The aim of Dam Removal Europe is to restore European rivers by removing dams, and in that way ensure the preservation of free-flowing rivers full of fish.

Several different aspects of dam removal will be discussed during the three-day seminar, such as effects of dams on migratory fish and whole ecosystems, social issues, hydro-industry perspectives and existing policies. The seminar will also include presentations of case studies and a visit to dam removal sites.

Read more and register for the seminar here!

I somras hade Nature en nyhetsartikel om dammrivningar och vandrande fiskar i USA: Dam removals: Rivers on the run. Artikeln tar upp den ökade mängden dammrivningar, potentiella problem med sediment från resarvoaren och efterföljande ökning av vandrande fiskbestånd.

“At Condit, fish were seen returning within weeks of the explosion. Two years later, the total exceeded 5,500, including steelhead and spring Chinook (Oncorhynchus tshawytscha), which had been effectively extirpated from the river, says Jody Lando, a quantitative ecologist with Stillwater Sciences in Portland, Oregon, who reported her results in May at an aquatic-sciences meeting in Portland… …But other parts of the United States have also seen dramatic fish returns. On south-central Wisconsin’s Baraboo River, the removal of a string of dams has allowed sturgeon to reach their former spawning grounds. And in New England, the destruction of two dams 7–9 metres high on Maine’s Kennebec River and one of its tributaries has allowed Atlantic alewives (Alosa pseudoharengus) to repopulate 100 kilometres of previously blocked-off river. In 1999, before the first dam was taken out, no alewives were recorded in the upper part of the watershed, says Serena McClain, head of river restoration for American Rivers. By 2013, the annual run had rebounded to around 3 million.”

Vi har tidigare på bloggen skrivit om restaureringsprojektet i Penobscot river där en restoration trust, kraftbolag, naturvårdsorganisationer, delstatsregering, indian förvaltning och den federala staten samarbetar för att riva bort ett par vattenkraftverk och samtidigt öka kraftproduktionen på återstående.

Här följer ett inslag från CBS News om floden som “runs wild once more”…: