Multislot Fishway Improves Entrance Performance and Fish Transit Time over Vertical Slots
نویسندگان
چکیده
Pool-type fishways have been increasingly tested to improve fish passage performance and minimize migration delays. Designing cost-effective is essential for a trade-off between water uses successful longitudinal connectivity restoration. The multislot fishway (MSF) concept, which operates with 30–50% lower discharge than vertical slot (VSF), was recently developed. This study assessed compared the entrance (entrance time; entry efficiency) transit times of two cyprinids VSFs MSFs. Four configurations, same structural characteristics (slope; depth; head drop; pool width depth), operating different discharges (Q), were (VSF 1: Q = 112 L·s?1; VSF 2: 80 MSF 58 37 L·s?1). Hydrodynamics characterization performed using numerical model. Results showed that efficiency higher in MSFs VSFs, while time overall lower. Numerical modelling revealed velocities around 30% MSFs, turbulence could reach difference 70% Reynolds shear stress 50% turbulent kinetic energy. Overall, can be considered as solution balance trade-offs divergent interests uses.
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ژورنال
عنوان ژورنال: Water
سال: 2021
ISSN: ['2073-4441']
DOI: https://doi.org/10.3390/w13030275