Using transparent fish to observe barotrauma associated with downstream passage through hydropower turbines

Pflugrath, Brett D.; Dowell, Frederick E.; Brown, Richard S.

doi:10.1002/rra.3676

Using transparent fish to observe barotrauma associated with downstream passage through hydropower turbines

Journal Article · Tue Jul 21 00:00:00 EDT 2020 · River Research and Applications

DOI:https://doi.org/10.1002/rra.3676· OSTI ID:1770375

^[1]; Dowell, Frederick E. ^[1]; Brown, Richard S. ^[1]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

During downstream passage of hydroelectric facilities, fish can be injured by rapid decompression; this is especially noted during hydroturbine passage. The rapid decrease in pressure can cause barotrauma as undissolved gas expands according to Boyle’s law. However, it is difficult to see barotrauma occurring within the body of the fish in real time. In order to determine if transparent fish could provide greater insight into barotrauma, five species of transparent tropical fish were exposed to rapid decompressions so internal injuries could be viewed noninvasively. Before and after photos were taken to review the injuries and high speed video allowed observations of barotrauma pathways in vivo. High speed video recordings show the expansion of the swim bladder and subsequent release of gas through the mouth and gills, and into the body cavity when the swim bladder ruptured. Post-decompression photographs show that many internal injuries were visible and included hemorrhaging and the presence of emphysema within the body cavity and tissues. These observations provide new opportunities to understand the pathways and effects of barotrauma.

View Accepted Manuscript (DOE)

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 1770375

Report Number(s):: PNNL-SA--151922

Journal Information:: River Research and Applications, Journal Name: River Research and Applications Journal Issue: 8 Vol. 36; ISSN 1535-1459

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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13 HYDRO ENERGY
60 APPLIED LIFE SCIENCES
emphysema
gas emboli
high‐speed video
pressure simulation
rapid decompression
swim bladder

Using transparent fish to observe barotrauma associated with downstream passage through hydropower turbines

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References (20)

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