Asymmetrical Wall Baffles to Assist Upstream Fish Passage in Box Culvert: Physical Modeling
Publication: Journal of Irrigation and Drainage Engineering
Volume 146, Issue 12
Abstract
Although waterway connectivity is a requirement for all freshwater fish, culverts have had negative impacts on freshwater river ecology. Following a recent biological study suggesting that asymmetrical wall baffles may be conducive to upstream passage of small-bodied fish, experimental modeling of plain wall baffles on one sidewall only was conducted under controlled flow conditions. The measurements were performed in a 15-m-long, 0.5-m-wide culvert barrel channel at several longitudinal and transverse locations for a broad range of discharges and baffle geometries to deliver a fine characterization of the hydrodynamics of the asymmetrically baffled channel. The physical modeling data illustrated the drastic impact of a seemingly simple boundary treatment (i.e., plain rectangular baffles) on the flow field. In practice, the installation of baffles has practical engineering implications that must not be ignored.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request. These include the tabular data corresponding to the data presented in Figs. 4–6.
Acknowledgments
The authors thank Dr. Carlos Gonzalez (Queensland Department of Transport and Main Roads), Brady Zieth (Bechtel Australia), and Dr. Hang Wang (Sichuan University) for their comments on the original study. They further thank the anonymous reviewers for their detailed comments. They acknowledge the technical assistance of Jason Van Der Gevel and Stewart Matthews (University of Queensland). The financial support through the Queensland Department of Transport and Main Roads (TMTHF1805) is acknowledged.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 146 • Issue 12 • December 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 1, 2020
Accepted: Jul 24, 2020
Published online: Sep 23, 2020
Published in print: Dec 1, 2020
Discussion open until: Feb 23, 2021
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