Unobstructed and Obstructed Turbulent Flow in Gravel Bed Rivers
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Volume 131, Issue 8
Abstract
An acoustic Doppler velocimeter was used to characterize turbulence in two gravel bed rivers. Data were collected in unobstructed flow and compared to recent investigations. Additional data collected in the wake of emergent boulders indicate that mean flow velocity, turbulent kinetic energy, gradients in the streamwise velocity, and Reynolds stress downstream from large rocks deviate from unobstructed flow results, but similar turbulence patterns are found behind each boulder. Results of this study are discussed with regard to natural channel design and fish habitat.
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Acknowledgments
This study has been funded by the Northwest Power Planning Council and Bonneville Power Administration through the Innovative Projects Program, No. 22022. Mark Stone and Patrick Flanagan’s efforts on this project are greatly appreciated. A special thanks is extended to the USGS for the use of their ADV probe and collaborative efforts. Further thanks is extended to the reviewers for their invaluable comments.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 131 • Issue 8 • August 2005
Pages: 635 - 645
Copyright
© 2005 ASCE.
History
Received: Nov 6, 2002
Accepted: Oct 27, 2004
Published online: Aug 1, 2005
Published in print: Aug 2005
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