Abstract

Hydropower is the most common form of renewable energy, and countries worldwide are considering expanding hydropower to new areas. One of the challenges of hydropower deployment is mitigation of the environmental impacts including water quality, habitat alterations, and ecosystem connectivity. For fish species that inhabit river systems with hydropower facilities, passage through the facility to access spawning and rearing habitats can be particularly challenging. Fish moving downstream through a hydro facility can be exposed to a number of stressors (e.g., rapid decompression, cavitation, blade strike and collision, turbulence, and shear forces), which can affect fish survival in direct and indirect ways. Many studies have investigated the effects of hydroturbine passage on fish; however, the comparability among studies is limited by variation in the metrics and biological endpoints used. Future studies investigating the effects of hydroturbine passage should focus on using metrics and endpoints that are...

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