Turning Pools in Stepped Fishways: Biological Assessment via Fish Response and CFD Models

With the aim of building more compact fishways and adapting them to field conditions improve their location by fish, it is common use turning pools, reducing longitudinal development construction. However, depending on design, pools may affect hydraulic performance fishway consequently fish passage. To study these phenomena, in a vertical slot different configurations submerged notches with bottom orifice types were assessed. Both studied using numerical 3D models via OpenFOAM, computational fluid dynamics software, combination responses, assessed PIT (Passive Integrated Transponder) tag telemetry for three species potamodromous cyprinids several fishways. Results show differences between hydrodynamics straight lower values hydrodynamic variables pools. Regarding behavior, ascent was slower but no effect passage success without being problem migration. This information validates as key design component species.