Hydraulic design criteria of the modified meander C-type fishway using the combined experimental and CFD models

Baharvand, Saman; Lashkar-Ara, Babak

doi:10.1016/j.ecoleng.2021.106207

Cited by 10 publications

(2 citation statements)

References 22 publications

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“…The zones complimentary to the jet zones act as recirculation zones where the species rest amid the migration for a few minutes to several days (DVWK, 2002; Haro et al, 2008; Silva et al, 2020; Baharvand and Lashkar-Ara, 2021). With an increase in b r , the volume of low-velocity regions reduces.…”

Section: Resultsmentioning

confidence: 99%

Experimental and numerical investigation on the hydraulic design criteria for a step-pool nature-like fishway

Kalathil

Chandra

2023

Progress in Physical Geography: Earth and Environment

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Hydraulic considerations specific for the design of step-pool nature-like fishways (NLFs) are limited to the body dimensions of the target species. Additional hydraulic criteria for flow depth, maximum values for each of pool depth, velocity, and turbulent kinetic energy in terms of the weir opening width and discharge can help design an optimum step-pool NLF. The present study developed design charts and rating curves based on numerical modeling using the computational fluid dynamics software FLOW-3D® HYDRO. Instantaneous velocity measurements on a 1:4 scaled physical model of a step-pool nature-like fishway designed as per the available design guidelines have been used to validate the numerical model. The hydrodynamics of the fishway with respect to the weir opening ratio b r (0.10, 0.25, 0.45, 0.65, and 1.00) and discharge Q (0.1–1.5 m3/s) was analyzed through numerical simulations on a prototype scale. The simulation results showed that the maximum flow velocity and the averaged velocity over the crest at b r = 0.10 and 0.25 are considerably lower than at b r > 0.25. The maximum turbulent kinetic energy and energy dissipation factors for the tested range of discharges were within recommended limits for b r = 0.10 and 0.25. The present study outcome in terms of the design charts and rating curves that illustrate the relationship between different variables can be used for an optimum design and ease in field implementation. In addition, the bed structure of the step-pool NLF presented in this study can be used to recreate full-scale or pilot models.

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Section: Resultsmentioning

confidence: 99%

Experimental and numerical investigation on the hydraulic design criteria for a step-pool nature-like fishway

Kalathil

Chandra

2023

Progress in Physical Geography: Earth and Environment

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“…These fishways may still experience low efficiency in actual operation, so different scholars have also tried to transform and optimize such classic structures [6]. The new style of fishways includes Tai Chi style, C-type, and various combinations of different fishways [7][8][9][10]. Exploring different types of new fishways is one of the popular directions in the current related fields.…”

Section: Introductionmentioning

confidence: 99%

Research on the Hydraulic Characteristics of Island Fishways by Experimental and Numerical Methods

Zeng

Mou

et al. 2023

Water

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With the development of hydraulic structures, rivers are becoming fragmented, and their connectivity is greatly affected. Important migratory routes through which fish complete their life processes are hindered. In severe cases, it may lead to the extinction of fish species. As facilities commonly used to assist fish upstreaming, fishways are significant for environmental remediation and have received attention from different scholars. This article proposed a new type of fishway, inspired by Tesla valves with obstructing reverse flow characteristics and classic fishway structures. Due to its characteristic of introducing a water-blocking island structure, it was denominated as an island-style fishway. This work studied an island fishway through a combination of physical models and numerical simulations. The results show that this fishway could achieve various flow patterns suitable for fish migration, and the flow rate control was stable. This study also explored the impact of island spacing arrangement on the turbulent structure of the pool chamber. It was found that when the island distance is set at 1.5d, indicators such as flow velocity and turbulent kinetic energy could achieve significant control effects. However, inappropriate d values might cause adverse effects. This research could provide reference ideas for the design of new fishways.

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Multi-model streamflow prediction using conditional bias-penalized multiple linear regression

Jozaghi

Shen

Ghazvinian

et al. 2021

Stoch Environ Res Risk Assess

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Hydraulic design criteria of the modified meander C-type fishway using the combined experimental and CFD models

Cited by 10 publications

References 22 publications

Experimental and numerical investigation on the hydraulic design criteria for a step-pool nature-like fishway

Experimental and numerical investigation on the hydraulic design criteria for a step-pool nature-like fishway

Research on the Hydraulic Characteristics of Island Fishways by Experimental and Numerical Methods

Multi-model streamflow prediction using conditional bias-penalized multiple linear regression

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