Mean Flow Characteristics in a Rock-Ramp-Type Fish Pass
Publication: Journal of Hydraulic Engineering
Volume 140, Issue 2
Abstract
Detailed mean flow characteristics generated by a staggered arrangement of boulders in a rock-ramp-type naturelike fish pass were investigated experimentally at three different channel slopes (5%, 3%, and 1.5%). The results showed that this type of fish pass can produce adequate water depth and favorable flow velocity suitable for fish passage. Three different characteristic velocity regions were identified, namely, downstream of boulders (wake region), intermediate region, and upstream of boulders. Some general correlations were developed for predicting the flow depth and velocity in a rock-ramp fish pass as a function of normalized discharge. Moreover, a flow-resistance analysis based on basic concepts for wake-interference flow regime in this fish pass has resulted in a general equation for the average velocity. This study improves the understanding of the complex flow characteristics in a rock-ramp fish pass.
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Acknowledgments
This research was made possible through grants from the Natural Sciences and Engineering Research Council of Canada and Diavik Diamond Mines, Inc. The authors wish to thank Gregory Courtice for his invaluable help in the lab measurements. The authors are also grateful to Felipe Justo Breton, Perry Fedun, and Chris Krath for building the experimental arrangement.
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Information
Published In
Journal of Hydraulic Engineering
Volume 140 • Issue 2 • February 2014
Pages: 156 - 168
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Dec 28, 2012
Accepted: Aug 8, 2013
Published online: Aug 10, 2013
Discussion open until: Jan 10, 2014
Published in print: Feb 1, 2014
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