What question did this study set out to answer?

This study aims to investigate the hydraulic behavior of vertical double-slot fishways to promote better fish passage.

Study of the turbulent flow inside vertical double-slot fishway for different slopes and discharges

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Randomized trial characterizes hydraulic flow in a vertical double-slot fishway, suggesting design improvements for fish passage.

This study aims to investigate the hydraulic behavior of vertical double-slot fishways to promote better fish passage.
Conducted laboratory experiments on a scaled model of vertical double-slot fishways using particle image velocimetry.
Analyzed different slopes (4–7.5%) and discharges (4.8–7.0) to examine flow characteristics and patterns.
Identified hydraulic zones through unsteady flow analysis and measured key parameters like velocity and turbulent kinetic energy.
A symmetrical flow topology with two main jets was observed, with 30.7% of the pool being favorable for fish passage.
Increasing slope led to wider jets, higher velocities, and a reduction in favorable areas for fish passage.
Discharge coefficients were found to be lower than in traditional one-slot fishways, indicating potential challenges for migratory fish.

Lejeune et al. (2026) studied this question.

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