Unobstructed and Obstructed Turbulent Flow in Gravel Bed Rivers |
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Authors: | Hans M Tritico Rollin H Hotchkiss |
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Affiliation: | 1Graduate Research Assistant, Dept. of Civil Engineering, Washington State Univ., P.O. Box 642910, Pullman, WA 99164-2910. E-mail: tritico@mail.wsu.edu 2Director, Albrook Hydraulics Laboratory, Dept. of Civil Engineering Washington State Univ., P.O. Box 642910, Pullman, WA 99164-2910.
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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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Keywords: | Turbulent flow River beds Fish habitats Cohesionless sediment Gravel |
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