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

Bravo‐Córdoba, Francisco Javier; Fuentes‐Pérez, Juan Francisco; Valbuena-Castro, Jorge; Paredes, Andrés Martínez de Azagra; Sanz‐Ronda, Francisco Javier

doi:10.3390/w13091186

Cited by 16 publications

(8 citation statements)

References 46 publications

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“…To date, Reynolds-averaged Navier–Stokes (RANS) turbulence simulation techniques are the most popular alternative for fishway modelling. Compared with other methods, RANS methods have demonstrated a good accuracy and computational cost [ 9 , 14 , 40 ]. In the study, the RNG k - ε model and the method of VOF were used.…”

Section: Methodsmentioning

confidence: 99%

“…There are two types of fishways: technical fishways and nature-like fishways. At present, many scholars have studied the technical fishway, especially for the vertical-slot fishway; they have mainly studied the flow characteristics of the common pool or the turning pool [ 7 , 8 , 9 ], and analyzed the effects of pool geometry changes such as the length and width of the pool, the layout of the vertical slots, the bottom slope and the macro-roughness on the flow conditions [ 10 , 11 , 12 , 13 , 14 ]. For the complex turbulent flow in the vertical-slot fishway, researchers also used more sophisticated turbulent models such as the detached eddy simulation and the large eddy simulation to study the velocity and eddy [ 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Parameters of Pool Geometry on Flow Structure in Nature-like Fishway

Wang

Zhu

et al. 2022

IJERPH

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Many uncertainties such as variable irregular structure and complex flow conditions bring difficulties to the design of a nature-like fishway. This study defines the main factors and parameters affecting flow conditions such as permeability ratio, offset ratio, bottom slope and pool length to simplify and generalize the irregular geometry of the nature-like fishway. According to the engineering requirements of the Mopiling nature-like fishway, the effect of the above parameters of pool geometry on the flow structure is investigated through a 3D turbulent numerical simulation, and the parameter thresholds are summarized according to the optimization of the flow conditions. The results show that under the same conditions, the maximum velocity of the control section increases with the increase in permeability ratio, bottom slope and pool length, and the offset ratio has limited effect on the maximum velocity of the control section. It is recommended that when the bottom slope is 1/250 and the pool length is 10 m, the permeability ratio should not be greater than 0.30 and the offset ratio should be located between 0.15 and 0.60. When the bottom slope is adjusted to 1/200, it is recommended to control the permeability ratio below 0.20, the offset ratio between 0.30 and 0.60, and the pool length can be adjusted to 8 m. Within the above threshold range of the design parameters, the maximum velocity in the fishway can be basically controlled at about 1.0 m/s. The mainstream in the pool is clear and the flow pattern is good, which can basically satisfy the requirements of fish passing. The relevant design parameters and optimization strategies can provide reference for similar projects.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Parameters of Pool Geometry on Flow Structure in Nature-like Fishway

Wang

Zhu

et al. 2022

IJERPH

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“…Therefore, solutions to control and reduce the negative effects of various dams have been considered (Katopodis, 2005; Katopodis & Aadland, 2006). Fishways, which are hydraulic structures, contribute to solving fish migration problems (Bravo‐Córdoba, Fuentes‐Pérez, Valbuena‐Castro, Martínez de Azagra‐Paredes, & Sanz‐Ronda, 2021; Katopodis & Williams, 2012), although challenges exist to meet the biological requirements of multiple fish species, particularly non‐salmonids (Hershey, 2021). These structures, dedicated to either upstream or downstream migrations, facilitate fish movements in rivers and allow species to reach their spawning grounds and feeding areas.…”

Section: Introductionmentioning

confidence: 99%

“…Biological requirements for fish migration include reaching suitable spawning grounds, finding food, avoiding unfavourable conditions, or expanding habitats (Bombač, Četina, & Novak, 2017; Katopodis & Aadland, 2006). Construction, operation and use of suitable fishways can successfully facilitate upstream and downstream passage of fish (Bravo‐Córdoba et al, 2021; Hershey, 2021; Katopodis & Williams, 2012; Noonan, Grant, & Jackson, 2012). In examining important and effective parameters for designing these structures in the past, the focus has usually been on the relationship between maximum water velocities and fish burst speeds, the ability and endurance to swim steadily, and the ability to swim along critical paths (e.g., Wang, An, Li, & Li, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Due to their technical characteristics, pool and weir fishways with plunging or streaming flow (Ead, Katopodis, Sikora, & Rajaratnam, 2004) are the most commonly used facilities for upward movements of fish. Vertical slot fishways, on the other hand, have the advantage of allowing fish to move from one pool to another without having to jump and can swim to any desired depth (Bravo-C ordoba et al, 2021;Katopodis, 2005). These studies have shown the importance of hydraulic parameters on the characteristics of fishways that aim to create a suitable environment for fish migration.…”

mentioning

confidence: 99%

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Numerical study of the effect of a V‐shaped weir on turbulence characteristics and velocity in V‐weir fishways

Shahabi

Ahadiyan

Ghomeshi

et al. 2022

River Research & Apps

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Fishways are used to allow fish to migrate around water infrastructure, whether movements are in the upstream or downstream direction. Hydrodynamic conditions within various fishways, including turbulence levels, are important for successful fish passage. A numerical hydrodynamic study was conducted for V-weir fishways, which assist species migrating upstream. The variables investigated included, fishway slopes of 4%, 7%, and 10%, relative spacing between weirs of 1.3, 2.6, and 4 (D/L, ratio of distance between weirs to pool width), and weir angles of 22.5 , 40 , and 60 . Turbulence characteristics, including turbulent kinetic energy (TKE), Reynolds shear stress (RSS), turbulent intensity (TI), turbulent dissipation (TD), as well as maximum water velocity, were examined by CFD (computational fluid dynamics) simulation using a re-normalized group or RNG turbulence model. The CFD was calibrated with flow measurements made in a physical model of the V-weir fishway in laboratory control experiments. Based on inferences from fish passage literature, the results showed that, in the range of parameters studied, a weir angle of 22.5 , a slope of 10% and relative spacing between weirs of 1.3 and 2.6 were assessed as offering the best potential performance for several species and sizes of fish, while the latter has lower cost as it requires fewer weirs. The V-weir fishway may be adaptable for smaller fish.

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Bidirectional connectivity in fishways: A mitigation for impacts on fish migration of small hydropower facilities

Bravo‐Córdoba

García‐Vega

Fuentes‐Pérez

et al. 2023

Aquatic Conservation

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1. Most freshwater fish need to move freely through rivers to complete their life cycles. Thus, river barriers (e.g. dams, culverts and gauging stations) may delay, hinder or even block their longitudinal movements, affecting fish conservation.The most widespread solution to allow upstream fish migration are fishways, whereas downstream migration is basically facilitated through spillways, turbines or specific solutions such as bypass systems.2. So far, studies and scientific discussions concerning bidirectional movements through fishways are scarce and focused on large dams and reservoirs, mainly with large migratory species such as salmonids, rather than smaller facilities and lesser known species.3. This study investigated bidirectional movements through a small run-of-the-river hydropower plant with a pool-and-orifice type fishway, using the Iberian barbel (Luciobarbus bocagei), a potamodromous cyprinid, as the target species. Passive integrated transponder and radio tracking data were collected over 4 years and combined to characterize upstream and downstream movements. The study focused primarily on fish movements through the fishway, but also estimated the multiple associated routes of passage.4. The results show diverse fish movements with inter-and intra-annual variability, with several individuals performing bidirectional movements and even some fish returning over the years. The documented movements and observations indicate that fishways can serveas an effective bidirectional migration corridor for fish, potentially enhancing the conservation efforts for potamodromous species. This study supports the decision to use fishways as an overall mitigation tool to reduce the impact of small hydropower facilities on fish.

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

Cited by 16 publications

References 46 publications

Effect of Parameters of Pool Geometry on Flow Structure in Nature-like Fishway

Effect of Parameters of Pool Geometry on Flow Structure in Nature-like Fishway

Numerical study of the effect of a V‐shaped weir on turbulence characteristics and velocity in V‐weir fishways

Bidirectional connectivity in fishways: A mitigation for impacts on fish migration of small hydropower facilities

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