Author(s): Damien Calluaud; Gerard Pineau; Alain Texier; Laurent David

Linked Author(s): Damien Calluaud, Laurent David

Keywords: Eco-hydraulics; fish passage; instantaneous flow; PIV; turbulent flow; vertical slot fishway

Abstract: 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.

DOI: https://doi.org/10.1080/00221686.2014.906000

Year: 2014