Journal
ECOLOGICAL ENGINEERING
Volume 132, Issue -, Pages 41-48Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ecoleng.2019.03.010
Keywords
Weir; Overshot; Undershot; Sluice gate; Fish passage; Strike; Shear; Decompression
Funding
- Australian Centre for International Agricultural Research
Ask authors/readers for more resources
Many riverine fish species disperse downstream as eggs, juveniles, or adults, which can expose them to injury and death at hydraulic structures. Low-head weirs are one example of a structure that can kill fish, and this impact has been shown to be substantially higher for undershot weirs when compared to overshot weirs. In this study, autonomous sensor devices were released at an overshot and undershot weir under similar discharges to assess what stressors maybe contributing to differences in the survival rates of fish. Although the undershot weir was more likely to expose fish to rapid decompression, the intensity of decompression was mild and it is more likely that higher levels of fluid shear at the undershot are more damaging to early life stage and small-bodied fish. Both weirs showed potential for strike, but this could be managed through improvements in design.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available