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Title: High fluid shear strain causes injury in silver shark: Preliminary implications for Mekong hydropower turbine design

Abstract

Fluid shear arises when two bodies of water, travelling at different velocities, intersect. Fish entrained at the interface of these two water masses will experience shear stress; which can be harmful. The stress magnitude is dependent on waterbody mass and velocity; with the fish impact largely related to body size. Elevated shear stress occurs where rapidly flowing water passes near spillways, across screens, within turbine draft tubes or other passage routes. A flume was used to determine critical tolerances of silver shark (Balantiocheilos melanopterus) to different shear stress rates generated by a high velocity jet. Fish experienced higher levels of injury and mortality as shear stress was increased. Excessive shear forces had damaging impacts on fish. Mortality occurred at shear levels higher that 600/s. It is important that developers should attempt to model potential shear profiles expected during turbine passage in selected designs. These data will be critical to determine potential impacts on fish. If the likelihood of adverse impact is high, then alternative designs which have lower shear stress could be explored.

Authors:
ORCiD logo [1];  [2];  [2];  [3];  [4];  [4];  [5];  [5]
  1. New South Wales Department of Primary Industries, Narrandera Fisheries Centre, Narrandera NSW Australia; Institute of Land, Water and Society, Charles Sturt University, Albury NSW Australia
  2. Faculty of Agriculture, Forestry and Fisheries, National University of Laos, Vientiane Lao People’s Democratic Republic
  3. New South Wales Department of Primary Industries, Port Stephens Fisheries Institute, Nelson Bay NSW Australia
  4. Institute of Land, Water and Society, Charles Sturt University, Albury NSW Australia
  5. Pacific Northwest National Laboratory, Richland WA USA
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1361950
Report Number(s):
PNNL-SA-115761
Journal ID: ISSN 0969-997X; WC0102000
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Fisheries Management and Ecology; Journal Volume: 24; Journal Issue: 3
Country of Publication:
United States
Language:
English
Subject:
mortality; mechanisms; hydro power plants; Implications; Mekong

Citation Formats

Baumgartner, L. J., Thorncraft, G., Phonekhampheng, O., Boys, C., Navarro, A., Robinson, W., Brown, R., and Deng, Z. D. High fluid shear strain causes injury in silver shark: Preliminary implications for Mekong hydropower turbine design. United States: N. p., 2017. Web. doi:10.1111/fme.12213.
Baumgartner, L. J., Thorncraft, G., Phonekhampheng, O., Boys, C., Navarro, A., Robinson, W., Brown, R., & Deng, Z. D. High fluid shear strain causes injury in silver shark: Preliminary implications for Mekong hydropower turbine design. United States. doi:10.1111/fme.12213.
Baumgartner, L. J., Thorncraft, G., Phonekhampheng, O., Boys, C., Navarro, A., Robinson, W., Brown, R., and Deng, Z. D. Thu . "High fluid shear strain causes injury in silver shark: Preliminary implications for Mekong hydropower turbine design". United States. doi:10.1111/fme.12213.
@article{osti_1361950,
title = {High fluid shear strain causes injury in silver shark: Preliminary implications for Mekong hydropower turbine design},
author = {Baumgartner, L. J. and Thorncraft, G. and Phonekhampheng, O. and Boys, C. and Navarro, A. and Robinson, W. and Brown, R. and Deng, Z. D.},
abstractNote = {Fluid shear arises when two bodies of water, travelling at different velocities, intersect. Fish entrained at the interface of these two water masses will experience shear stress; which can be harmful. The stress magnitude is dependent on waterbody mass and velocity; with the fish impact largely related to body size. Elevated shear stress occurs where rapidly flowing water passes near spillways, across screens, within turbine draft tubes or other passage routes. A flume was used to determine critical tolerances of silver shark (Balantiocheilos melanopterus) to different shear stress rates generated by a high velocity jet. Fish experienced higher levels of injury and mortality as shear stress was increased. Excessive shear forces had damaging impacts on fish. Mortality occurred at shear levels higher that 600/s. It is important that developers should attempt to model potential shear profiles expected during turbine passage in selected designs. These data will be critical to determine potential impacts on fish. If the likelihood of adverse impact is high, then alternative designs which have lower shear stress could be explored.},
doi = {10.1111/fme.12213},
journal = {Fisheries Management and Ecology},
number = 3,
volume = 24,
place = {United States},
year = {Thu Feb 09 00:00:00 EST 2017},
month = {Thu Feb 09 00:00:00 EST 2017}
}
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