Mean Flow Characteristics in a Rock-Ramp-Type Fish Pass

Baki, Abul Basar M.; Zhu, David Z.; Rajaratnam, N.

doi:10.1061/(asce)hy.1943-7900.0000816

Cited by 61 publications

(47 citation statements)

References 32 publications

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“…(), as well as Baki et al . (, ), analyzed the flow field and turbulence in a typical salmonid fish ramp. Their results showed that flow velocities occurring in the fishway would allow the passage of C .…”

Section: Discussionmentioning

confidence: 99%

Hydropower Development, Riverine Connectivity, and Non-sport Fish Species: criteria for Hydraulic Design of Fishways

et al. 2016

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Hydropower barriers are among the most conspicuous anthropogenic alterations to natural riverine connectivity, resulting in species-specific effects linked to dispersal abilities, especially swimming performance. They may present a particular problem for small-bodied 'non-sport fish', such as those that characterize the freshwater communities of temperate regions in the Southern Hemisphere. Recent studies have suggested that nature-like fishways could ensure passage of diverse fish assemblages through hydropower barriers. Through experiments performed in a swim tunnel, we present, for the first time, fishway design criteria for two non-sport species endemic to Chile, a country experiencing rapid hydropower development. In`cremental velocity tests showed that Cheirodon galusdae and juveniles of Basilichthys microlepidotus were capable of very similar standardized critical swimming speeds of 69.7 and 69.6 cm s À1 , respectively. When expressed in units of body lengths, C. galusdae was capable of very high critical speeds of 16.2 bl s À1, whereas for B. microlepidotus, this was 7.6 bl s À1 . However, fixed velocity tests revealed that the swimming endurance of the latter species was slightly higher. Dimensionless analysis showed a clear relationship between fatigue time and fish Froude number, similar to that already described for subcarangiforms. Based on these results, we present fishway design curves indicating a transition from sustained to prolonged swimming at a fishway length of 15 m. Our results show that the swimming capacity of these species is well-suited to the mean flow velocity field described for nature-like fishways. However, more work is required to understand the effects of turbulence on the passage of non-sport species.

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Section: Discussionmentioning

confidence: 99%

Hydropower Development, Riverine Connectivity, and Non-sport Fish Species: criteria for Hydraulic Design of Fishways

et al. 2016

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“…Under these conditions, the flow is usually explained by means of relative energy dissipation and friction factors in SPNFs (Oertel and Schlenkhoff, 2012). These variables will depend on the configuration of the boulder arrangements (boulder size, shape and concentration), the slope (Oertel and Schlenkhoff, 2012;Cassan and Laurens, 2016) and also on the submergence ratio (Oertel and Schlenkhoff, 2012;Baki et al, 2014). Likewise, more studies under these experimental conditions are necessary to evaluate the performance of the proposed equations.…”

Section: 3mentioning

confidence: 99%

Villemonte's approach: a general method for modeling uniform and non-uniform performance in stepped fishways

Fuentes‐Pérez

García‐Vega

Sanz‐Ronda

et al. 2017

Knowl. Manag. Aquat. Ecosyst.

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-Stepped fishways are the most popular solutions to enable the free movement of fish fauna through weirs and dams. Given the flow variation of rivers throughout the year, successful fish migration through stepped fishways relies on the accurate discharge calculation and their modeling under variable scenarios. This study aims to propose a general method for flow and water level calculation of stepped fishways, unifying different findings in specialized literature. To achieve this purpose, the relation defined by Villemonte is used and tested under laboratory and field case studies. This study shows that the hydraulic behavior of a wide range of stepped fishway typologies can be explained based on a single equation, as well as the need of calibration of the coefficients involved in this equation for different subtypes. Furthermore, the proposed method enables the water level modeling under variable boundary conditions, which in turns allows the analysis of stepped fishways hydraulic performance under different river scenarios. The comparison of the hydraulic parameters in the fishways with the physical capacities and preferences of fish will contribute to the fulfillment of their main objective: allow free movement of fish fauna.Keywords: discharge coefficient / flow measurement / vertical slot fishway / pool and weir fishway / nature-like fishway Résumé -L'approche de Villemonte : une méthode générale de modélisation de la performance uniforme et non uniforme dans les échelles à poissons. Les échelles à poissons sont les solutions les plus populaires pour permettre la libre circulation de la faune piscicole à travers les seuils et les barrages. Compte tenu de la variation de débit des cours d'eau tout au long de l'année, la migration réussie des poissons par ces passes à poissons repose sur le calcul exact de la décharge et sa modélisation dans des scénarios variables. Cette étude a pour but de proposer une méthode générale de calcul du débit et du niveau d'eau des échelles à poissons, synthétisant différents résultats de la littérature spécialisée. Pour atteindre cet objectif, la relation définie par Villemonte est utilisée et testée dans des études de cas en laboratoire et sur le terrain. Cette étude montre que le comportement hydraulique d'une large gamme de typologies de poissons en gradins peut être expliqué sur la base d'une seule équation, avec besoin d'étalonnage des coefficients impliqués dans cette équation pour différents sous-types. De plus, la méthode proposée permet de modéliser le niveau de l'eau dans des conditions aux limites variables, ce qui permet, à son tour, d'analyser la performance hydraulique des passes de poissons en escaliers selon différents scénarios de rivières. La comparaison des paramètres hydrauliques dans les passes à poissons avec les capacités physiques et les préférences des poissons contribuera à la réalisation de leur objectif principal : permettre la libre circulation de la faune aquatique.Mots-clés : coefficient de décharge / mesure de débit / passe à fentes vert...

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“…Recent recognitions of the ecological impacts of culverts on fish passage led to reconsiderations of culvert design guidelines (Behlke et al, ; Chorda, Larinier, & Font, ; Hotchkiss & Frei, ). Roughness‐induced effects on fish swimming performance were investigated in a number of recent studies (Baki, Zhu, & Rajaratnam, ; Cassan, Tien, Courret, Laurens, & Dartus, ; Lacey & Rennie, ). Low‐velocity regions, and associated flow features, were observed and taken advantage of by the fish (David, Calluaud, Pineau, & Texier, ; Johnson & Rice, ).…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional numerical simulations of smooth, asymmetrically roughened, and baffled culverts for upstream passage of small‐bodied fish

Zhang

Chanson

2018

River Research & Apps

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Traditional box culvert designs lead to development of high velocity zones in the culvert barrel that often impede upstream migration of fish. Herein, three‐dimensional Reynolds‐averaged Navier‐Stokes (RANS)‐ and Large eddy simulation (LES)‐based computational fluid dynamics (CFDs) simulations were performed to compare the effectiveness of smooth, asymmetrically roughened, and corner‐baffled barrels, in creating low‐velocity zones (LVZs) and providing opportunity for upstream passage of small‐bodied fish. The results revealed distinctive benefits provided by the asymmetrically roughened and corner‐baffled barrels relative to the smooth barrel. Cross‐sectional asymmetry, corners, and obstructions are important factors that contribute to the generation of LVZs conducive to fish passage, albeit contiguity of LVZs is required, particularly for weak swimmers. The study demonstrates the adequacy and effectiveness of CFD models to complement traditional laboratory studies in understanding basic mechanisms beneficial to fish passage and to provide insights into future designs.

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Mean Flow Characteristics in a Rock-Ramp-Type Fish Pass

Cited by 61 publications

References 32 publications

Hydropower Development, Riverine Connectivity, and Non-sport Fish Species: criteria for Hydraulic Design of Fishways

Hydropower Development, Riverine Connectivity, and Non-sport Fish Species: criteria for Hydraulic Design of Fishways

Villemonte's approach: a general method for modeling uniform and non-uniform performance in stepped fishways

Three‐dimensional numerical simulations of smooth, asymmetrically roughened, and baffled culverts for upstream passage of small‐bodied fish

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