Event Title

Session A2 - A historical perspective on downstream passage at hydroelectric plants in Swedish rivers

Location

UMass Amherst

Event Website

http://fishpassage.ecs.umass.edu/Conference2012/

Start Date

5-6-2012 2:10 PM

End Date

5-6-2012 2:30 PM

Description

Downstream passage problems have been studied mainly in Europe and North America, but not so much in the rest of the world, and have focused on anadromous species, particularly salmonids. Relatively few studies have been conducted on other migratory species. Moreover, in many cases bypass facilities for downstream migrants have been implemented without evaluating their effectiveness or if effectiveness has been evaluated, it has often been shown to be low. We will provide a brief historical review of downstream bypass problems in Sweden. This is followed by a description of the Swedish situation today, with focus on several case studies that have evaluated downstream bypass efficiency in rivers of different sizes and for several different species. We have divided Swedish rehabilitation history into four periods: Fish migration and natural reproduction (pre 1900s), Fish ladders and racks with unknown function (1900-1935), The compensatory stocking and turbine passage era (1935-2000), and the modern approach of rehabilitating regulated rivers to allow natural reproduction. We will give examples of recent rehabilitation on Swedish rivers including measures such as inclined racks and bypasses/traps and guiding/skimming walls and we will present the results from their evaluation.

Comments

I, Olle Calles, was born in Uppsala in 1974, and grew up in Uppland and Dalarna. I got my M.Sc. in Biology at Uppsala University in 2000, which included one year stint as an exchange student at James Cook University, Townsville, Australia. After my studies in Uppsala I worked with various projects at the County Board in Gavleborg, before starting a PhD-position at Karlstad University in 2001. I finished my PhD in early 2006 and spent some 1½ years doing research and lecturing before being accepted for a postdoctoral fellowship at Politecnico di Torino, Italy, in 2008. After my return to Sweden and Karlstad University in 2009, I have held a position as assistant professor, which was co-funded by The Knowledge Foundation (Swedish: KK-stiftelsen), E.ON Hydropower and Karlstad University.

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Jun 5th, 2:10 PM Jun 5th, 2:30 PM

Session A2 - A historical perspective on downstream passage at hydroelectric plants in Swedish rivers

UMass Amherst

Downstream passage problems have been studied mainly in Europe and North America, but not so much in the rest of the world, and have focused on anadromous species, particularly salmonids. Relatively few studies have been conducted on other migratory species. Moreover, in many cases bypass facilities for downstream migrants have been implemented without evaluating their effectiveness or if effectiveness has been evaluated, it has often been shown to be low. We will provide a brief historical review of downstream bypass problems in Sweden. This is followed by a description of the Swedish situation today, with focus on several case studies that have evaluated downstream bypass efficiency in rivers of different sizes and for several different species. We have divided Swedish rehabilitation history into four periods: Fish migration and natural reproduction (pre 1900s), Fish ladders and racks with unknown function (1900-1935), The compensatory stocking and turbine passage era (1935-2000), and the modern approach of rehabilitating regulated rivers to allow natural reproduction. We will give examples of recent rehabilitation on Swedish rivers including measures such as inclined racks and bypasses/traps and guiding/skimming walls and we will present the results from their evaluation.

http://scholarworks.umass.edu/fishpassage_conference/2012/June5/28