Modification of vertical slot fishway flow with a supplementary cylinder

The paper reports on the experimental results of a vertical slot fishway (VSF) study. Particle image velocimetry and Acoustic Doppler Velocimetry were used to estimate the effects of a supplementary cylinder, appropriately positioned inside existing VSFs, on the hydraulic parameters and the instanta...

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Bibliographic Details
Published in:Journal of hydraulic research 2014-09, Vol.52 (5), p.614-629
Main Authors: Calluaud, Damien, Pineau, Gerard, Texier, Alain, David, Laurent
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Cylinders
Dust
Earth sciences
Earth, ocean, space
Eco-hydraulics
Exact sciences and technology
Fish
fish passage
Fluid dynamics
Fluid flow
Fresh water ecosystems
Fundamental and applied biological sciences. Psychology
Hydraulics
Hydrology
Hydrology. Hydrogeology
instantaneous flow
PIV
Swimming
Synecology
Turbulence
Turbulent flow
vertical slot fishway
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Summary:The paper reports on the experimental results of a vertical slot fishway (VSF) study. Particle image velocimetry and Acoustic Doppler Velocimetry were used to estimate the effects of a supplementary cylinder, appropriately positioned inside existing VSFs, on the hydraulic parameters and the instantaneous flow patterns. Special attention was paid to the analysis of the spatial flow distribution and to the instantaneous flow dynamics initiated by the addition of a cylinder. Modifications of velocity amplitudes, flow fluctuations and vorticity values were quantified for two dimensions of VSF. The contribution of a supplementary cylinder has been quantified in order to "smooth" the effects of turbulence and to facilitate the passage of the largest number of fish irrespective of their size or swimming capacity. The results provided insights on the control of the fishway turbulence, which might help engineers to develop effective systems for the passage of fish with low swimming capabilities.
ISSN:0022-1686
1814-2079
DOI:10.1080/00221686.2014.906000