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Articoli di riviste sul tema "Fishways"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Zhai, Yuheng, and Li Jiang. "EVALUATING FISH PASSAGE EFFICIENCY IN VERTICAL SLOT FISHWAYS USING THE ANALYTIC HIERARCHY PROCESS." Stavební obzor - Civil Engineering Journal 33, no. 2 (2024): 230–45. http://dx.doi.org/10.14311/cej.2024.02.0016.

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Based on the Analytic Hierarchy Process (AHP), a comprehensive evaluation system has been developed to assess the performance of vertical slot fishways. This system incorporates 30 factors related to fish passing efficiency, thereby facilitating a detailed analysis of hydraulic characteristics, engineering layout, operation management, and monitoring. For its practical application, the vertical slot fishway at the Laolongkou Hydro-junction project’s comprehensive evaluation was assessed and consequently rated as "Operating Excellently". This rating accurately reflects the fishway’s operational

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2

Gilja, Gordon, Eva Ocvirk, and Robert Fliszar. "Experimental Investigation of the Reynolds Shear Stress Exceedance Rate for the Injury and Disorientation Biocriteria Boundary in the Pool-Orifice and Vertical Slot Type Fishways." Applied Sciences 11, no. 16 (2021): 7708. http://dx.doi.org/10.3390/app11167708.

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Fragmentation of rivers has a negative impact on river’s ecological status which can be improved by the construction of fishways next to obstacles in rivers that prevent a free migration. Flow field characteristics are key factors in the design process of hydraulically efficient fishways—flow and turbulence patterns in a functional fishway allow fish to enter, progress through and exit with minimum time/energy expenditure. The aim of this paper is an experimental study of the flow field characteristics measured in the physical fishway model with the goal of providing information on the Reynold

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3

Yu, Fei, Jia Yuan Wang, and Li Quan Xie. "Hydrodynamic Characteristics in Ecological Arc-Shaped Baffle Fishway." Applied Mechanics and Materials 212-213 (October 2012): 1119–22. http://dx.doi.org/10.4028/www.scientific.net/amm.212-213.1119.

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Fishways are hydraulic structures allowing fishes upstream migration through engineering constructions in the rivers. The Denil type has a wide application and the main components are flat baffles. In this paper, we present a new type of baffle (arc-shaped baffle) to ameliorate the hydrodynamic characteristics in the fishway. The main improvement of arc-shaped baffle fishway is the alteration that the flat baffles are replaced by arc-baffles. In order to investigate the influence of water flow on migratory fish in the arc-baffle fishway, model tests were conducted. Based on the experimental re

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4

Schwalme, Karl, William C. Mackay, and Dieter Lindner. "Suitability of Vertical Slot and Denil Fishways for Passing North-Temperate, Nonsalmonid Fish." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 11 (1985): 1815–22. http://dx.doi.org/10.1139/f85-227.

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A vertical slot fishway and two Denil fishways (of 10 and 20% slope) built into a weir on the Lesser Slave River (55°18′N, 115°45′W) were studied from May 12 to June 25, 1984, to determine how effectively these designs pass north-temperate, nonsalmonid fishes. Thousands of spottail shiner (Notropis hudsonius), substantial numbers (> 100) of northern pike (Esox lucius), longnose sucker (Catostomus catostomus), white sucker (Catostomus commersoni), immature yellow perch (Perca flavescens), and lesser numbers of burbot (Lota lota), adult yellow perch, lake whitefish (Coregonus clupeaformis), a

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5

Baumgartner, Lee J., Craig A. Boys, Ivor G. Stuart, and Brenton P. Zampatti. "Evaluating migratory fish behaviour and fishway performance: testing a combined assessment methodology." Australian Journal of Zoology 58, no. 3 (2010): 154. http://dx.doi.org/10.1071/zo10035.

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To provide passage for migratory native fish, a series of 14 vertical-slot and lock fishways are being constructed on the Murray River in south-eastern Australia. Three of these vertical-slot fishways, at Locks 7, 9 and 10, have a conservative slope (1V : 32H) and are designed with internal hydraulics suitable for the passage of a broad size range of fish (30–1000 mm long). An assessment of these fishways was performed using a combined trapping survey and passive integrated transponder (PIT) approach to determine fishway effectiveness at passing an entire fish community. Fish were trapped with

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6

Rajaratnam, N., C. Katopodis, and A. Mainali. "Pool-orifice and pool-orifice-weir fishways." Canadian Journal of Civil Engineering 16, no. 5 (1989): 774–77. http://dx.doi.org/10.1139/l89-112.

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This technical note presents a method of analyzing the flow in pool-orifice fishways by dividing it into vertical slot and submerged orifice flow regimes. For a pool-orifice-weir fishway, with flow through the orifice as well as over the weir, a method has been suggested for predicting the total flow rate in the fishway. Experimental observations are presented in support of these methods. Key words: open-channel flow, hydraulics, fishways, turbulent flow.

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7

Zheng, Tiegang, Zhipan Niu, Shuangke Sun, Jiayue Shi, Haitao Liu, and Guangning Li. "Comparative Study on the Hydraulic Characteristics of Nature-Like Fishways." Water 12, no. 4 (2020): 955. http://dx.doi.org/10.3390/w12040955.

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Due to the complex structure and the multiformity of boulder arrangements, there is currently no perfect design criterion for nature-like fishways. This paper proposes four types of nature-like fishways arranged with an impermeable partition wall (IPW), a semi-permeable partition wall (SPPW) or a fully permeable partition wall (FPPW). The hydraulic characteristics of these fishways were investigated experimentally. The results show that the discharge of the fishway arranged with a FPPW was almost twice that of an IPW fishway, and the discharge of a SPPW fishway was between the two extremes. Th

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8

Bravo-Córdoba, Francisco Javier, Juan Francisco Fuentes-Pérez, Jorge Valbuena-Castro, Andrés Martínez de Azagra-Paredes, and Francisco Javier Sanz-Ronda. "Turning Pools in Stepped Fishways: Biological Assessment via Fish Response and CFD Models." Water 13, no. 9 (2021): 1186. http://dx.doi.org/10.3390/w13091186.

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With the aim of building more compact fishways and adapting them to field conditions to improve their location by fish, it is common to use turning pools, reducing the longitudinal development of the construction. However, depending on their design, turning pools may affect the hydraulic performance of the fishway and consequently the fish passage. To study these phenomena, turning pools in a vertical slot and in different configurations of submerged notches with bottom orifice fishway types were assessed. Both types of fishways were studied using numerical 3D models via OpenFOAM, a computatio

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9

Castro-Santos, Theodore, Xiaotao Shi, and Alex Haro. "Migratory behavior of adult sea lamprey and cumulative passage performance through four fishways." Canadian Journal of Fisheries and Aquatic Sciences 74, no. 5 (2017): 790–800. http://dx.doi.org/10.1139/cjfas-2016-0089.

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This article describes a study of PIT-tagged sea lamprey (Petromyzon marinus) ascending four fishways comprising three designs at two dams on the Connecticut River, USA. Migration between dams was rapid (median migration rate = 23 km·day−1). Movement through the fishways was much slower, however (median = 0.02–0.33 km·day−1). Overall delay at dams was substantial (median = 13.6–14.6 days); many fish failed to pass (percent passage ranged from 29% to 55%, depending on fishway), and repeated passage attempts compounded delay for both passers and failers. Cox regression revealed that fishway entr

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10

Masumoto, Taku, Masahiko Nakai, Takashi Asaeda, and Mizanur Rahman. "Effectiveness of New Rock-Ramp Fishway at Miyanaka Intake Dam Compared with Existing Large and Small Stair-Type Fishways." Water 14, no. 13 (2022): 1991. http://dx.doi.org/10.3390/w14131991.

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The migration of fish is influenced by the unique environmental characteristics of the destination and migratory habitat preferences. There are three fishways in Miyanaka Intake Dam. The rock-ramp fishway was newly established in 2012, creating an environment with different flow velocities and water depths. The purpose of this study was to investigate the effectiveness of the new rock-ramp fishway for native fish through two surveys. In the first survey, traps were installed during the survey period in all three fishways and all fish were caught. The run-up environment was quantified by measur

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11

Stuart, Ivor G., Brenton P. Zampatti, and Lee J. Baumgartner. "Can a low-gradient vertical-slot fishway provide passage for a lowland river fish community?" Marine and Freshwater Research 59, no. 4 (2008): 332. http://dx.doi.org/10.1071/mf07141.

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Fishways are commonly used to restore native fish movements in regulated rivers. In the Murray-Darling Basin, Australia, 14 fishways are to be built by 2011 to improve passage along 2225 km of the river. The first of these fishways, constructed in 2003, is a vertical-slot design with low water velocities (0.98–1.4 m s–1) and turbulence (average 42 W m–3). This design was selected to provide passage for individuals between 20 and 1000 mm long. To determine passage success, trapping and a remote automated passive integrated transponder (PIT) tag reading system was used from October 2003 to Febru

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12

Sanz-Ronda, Francisco Javier, Juan Francisco Fuentes-Pérez, Ana García-Vega, and Francisco Javier Bravo-Córdoba. "Fishways as Downstream Routes in Small Hydropower Plants: Experiences with a Potamodromous Cyprinid." Water 13, no. 8 (2021): 1041. http://dx.doi.org/10.3390/w13081041.

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Fish need to move upstream and downstream through rivers to complete their life cycles. Despite the fact that fishways are the most commonly applied solution to recover longitudinal connectivity, they are not considered viable for downstream migration. Therefore, alternative facilities are recommended to facilitate downstream migration. However, a few recent studies have disagreed with this general assumption, showing the potential for bidirectional movements. This study advances our understanding of the potential of fishways for downstream migration by studying their efficiency in a run-of-th

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13

Fuentes-Pérez, Juan Francisco, Ana García-Vega, Francisco Javier Bravo-Córdoba, and Francisco Javier Sanz-Ronda. "A Step to Smart Fishways: An Autonomous Obstruction Detection System Using Hydraulic Modeling and Sensor Networks." Sensors 21, no. 20 (2021): 6909. http://dx.doi.org/10.3390/s21206909.

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Stepped fishways are structures that allow the free movement of fish in transversal obstacles in rivers. However, the lack of or incorrect maintenance may deviate them from this objective. To handle this problem, this research work presents a novel low-cost sensor network that combines fishway hydraulics with neural networks programmed in Python (Keras + TensorFlow), generating the first autonomous obstruction/malfunction detection system for stepped fishways. The system is based on a network of custom-made ultrasonic water level nodes that transmit data and alarms remotely and in real-time. I

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14

Rajaratnam, N., and C. Katopodis. "Hydraulics of steeppass fishways." Canadian Journal of Civil Engineering 18, no. 6 (1991): 1024–32. http://dx.doi.org/10.1139/l91-125.

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This paper presents the results of an experimental study on the hydraulics of steeppass fishways. Using theoretical considerations and experimental observations, an expression has been developed that relates the flow rate, slope of the fishway, and depth of flow. It was also found that the characteristic (similarity) velocity profile found earlier, for smaller values of depth to width ratio,y0/b, with the maximum velocity near the bottom, changes to a rather symmetrical profile with the maximum velocity occurring somewhere near the mid-depth for larger values of y0/b. A correlation has also be

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15

Branco, Paulo, Ana Margarida Mascarenhas, Gonçalo Duarte, et al. "Vertical Slot Fishways: Incremental Knowledge to Define the Best Solution." Biology 12, no. 11 (2023): 1431. http://dx.doi.org/10.3390/biology12111431.

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River artificial fragmentation is arguably the most imperilling threat for freshwater-dependent fish species. Fish need to be able to freely move along river networks as not only spawning grounds but also refuge and feeding areas may be spatially and temporally separated. This incapacity of free displacement may result in genetic depletion of some populations, density reduction and even community changes, which may in turn affect how meta-community balances are regulated, potentially resulting in functional resilience reduction and ecosystem processes’ malfunction. Fishways are the most common

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16

Cooper, Bethany, Lin Crase, and Lee J. Baumgartner. "Estimating benefits and costs: a case of fish passages in Lao PDR and the development of the Lower Mekong Fishway Support Tool." Marine and Freshwater Research 70, no. 9 (2019): 1284. http://dx.doi.org/10.1071/mf19156.

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Fishways are often presented as a parsimonious way of assisting water infrastructure development in developing countries while preserving some ecosystem values. More specifically, fishways help preserve migratory freshwater fish species, which are often a main source of protein and other nutrients for many rural communities. To date, much of the literature regarding fishway development focuses on increasing understanding of the interaction between the fish populations and engineering interventions. Accordingly, there is limited analysis that considers fishway construction relative to the speci

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17

Aoki, Muneyuki, Masayuki Nitta, Tomoaki Funakoshi, and Taisei Sato. "A Novel Roughness and Flow Pattern for Steep Stream-Type Fishways: Preliminary Insights." Water 14, no. 16 (2022): 2540. http://dx.doi.org/10.3390/w14162540.

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The purpose of this study was to allow fish to move upstream past barriers or difficult sections of passage, even on steep stream-type fishways. Therefore, the authors devised a roughness arrangement to raise the water depth in the fishway and reduce its flow velocity. Roughness was used as a group in the arrangement so as to expect afflux effects. Water depth was raised and the flow velocity was reduced around the roughness groups, which allowed fish to hold position and move upstream. Although rapid flow was locally formed in some spots in the fishway, its area was small, enabling the fish t

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18

Pennock, Casey A., David Bender, Jordan Hofmeier, et al. "Can fishways mitigate fragmentation effects on Great Plains fish communities?" Canadian Journal of Fisheries and Aquatic Sciences 75, no. 1 (2018): 121–30. http://dx.doi.org/10.1139/cjfas-2016-0466.

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Fishways are a common tool for mitigating the effects of habitat fragmentation on fish, but their utility in low-gradient, sand-bed rivers of the Great Plains is not well studied. The Lincoln Street Fishway on the Arkansas River became operational in 2015 and was built specifically to pass small-bodied threatened fishes. We compared current and historical surveys up- and downstream of the barrier to test the effect of the fishway on community structure and conducted tagging experiments to test the ability of fishes to move into and through the fishway. Differences in community structure and sp

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19

Silva, Ana T., María Bermúdez, José M. Santos, Juan R. Rabuñal, and Jerónimo Puertas. "Pool-Type Fishway Design for a Potamodromous Cyprinid in the Iberian Peninsula: The Iberian Barbel—Synthesis and Future Directions." Sustainability 12, no. 8 (2020): 3387. http://dx.doi.org/10.3390/su12083387.

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The Iberian barbel (Luciobarbus bocagei) is one of the most common cyprinids in the Iberian Peninsula, whose migratory routes are often hampered by anthropogenic barriers. Fishways might be an effective mitigation measure if they integrate designed operational characteristics that account for the biomechanical requirements of this species. Understanding the flow conditions inside the fishway, and how barbel responds to the hydrodynamics of the flow is imperative to improve free migratory routes with minimum energetic cost associated. Herein, we analyze and synthesize the main findings of resea

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Sanz-Ronda, Bravo-Córdoba, Sánchez-Pérez, et al. "Passage Performance of Technical Pool-Type Fishways for Potamodromous Cyprinids: Novel Experiences in Semiarid Environments." Water 11, no. 11 (2019): 2362. http://dx.doi.org/10.3390/w11112362.

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Endemic freshwater fish from semiarid environments are among the most threated species in the world due to water overexploitation and habitat fragmentation problems. Stepped or pool-type fishways are used worldwide to reestablish longitudinal connectivity and mitigate fish migration problems. Many of them are being installed or planned in rivers of semiarid environments, however, very few studies about fish passage performance through pool-type fishways has been carried out to date on these regions. The present work focuses on the passage performance of two potamodromous cyprinids endemic of t

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21

Mallen-Cooper, M. "Swimming ability of juvenile Australian bass, Macquaria novemaculeata (Steindachner), and juvenile barramundi, LAtes calcarifer (Bloch), in an experimental vertical-slot fishway." Marine and Freshwater Research 43, no. 4 (1992): 823. http://dx.doi.org/10.1071/mf9920823.

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Australian bass, Macquaria novemaculeata, and barramundi, Lates calcarlfer, are catadromous fish that spawn in estuaries and the juveniles migrate upstream into fresh water. Lowland fishways in the range of these species therefore need to accommodate these juvenile fish. The swimming abilities of three size classes (fork length (LCF) + s.d.: 40 * 3 mm, 64 + 5 mm and 93 + 8 mm) of juvenile Australian bass and one size class (43 4 mm total length) of juvenile barramundi were tested in an experimental vertical-slot fishway. Water velocity was calculated from the head loss in water level between a

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Maeda, Shigeya, Yuri Yoshida, Kanuka Yoshinari, and Naoki Takahashi. "Effective Placement Strategies for Portable Fishways in Agricultural Drainage Canals: A Numerical Investigation." Sustainability 15, no. 23 (2023): 16283. http://dx.doi.org/10.3390/su152316283.

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Agricultural drainage canals that connect upstream fish spawning areas to downstream rivers and lakes serve as crucial habitats for migrating fish. However, disconnections, such as drops and chutes, have been constructed in these canals due to agricultural modernization and flood control measures, hindering the movement of fish that find it difficult to ascend in fast-flowing currents. Portable fishways offer a promising solution to reconnect waterbodies in agricultural canals, as they can be easily removed during high water discharges to avoid impeding the canals’ drainage function. In additi

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Keefer, Matthew L., Christopher C. Caudill, Tami S. Clabough, et al. "Fishway passage bottleneck identification and prioritization: a case study of Pacific lamprey at Bonneville Dam." Canadian Journal of Fisheries and Aquatic Sciences 70, no. 10 (2013): 1551–65. http://dx.doi.org/10.1139/cjfas-2013-0164.

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Fishways designed for salmonids often restrict passage by non-salmonids, and effective tools are needed both to identify passage problems for nontarget species and to inform remediation planning. In this case study, we used migration histories from 2170 radio-tagged adult Pacific lamprey (Entosphenus tridentatus) to identify locations of poor passage (bottlenecks) at a large, multifishway dam. Over 10 years, 49% of tagged lamprey that entered fishways failed to pass the dam. Models accounting for repeated attempts by individual lamprey indicated successful passage strongly depended on attempte

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Zeng, Guorui, Maosen Xu, Jiegang Mou, Keke Wang, and Yun Ren. "Research on the Hydraulic Characteristics of Island Fishways by Experimental and Numerical Methods." Water 15, no. 14 (2023): 2592. http://dx.doi.org/10.3390/w15142592.

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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 c

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Rodríguez, Álvaro, María Bermúdez, Juan R. Rabuñal, and Jerónimo Puertas. "Fish tracking in vertical slot fishways using computer vision techniques." Journal of Hydroinformatics 17, no. 2 (2014): 275–92. http://dx.doi.org/10.2166/hydro.2014.034.

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Vertical slot fishways are hydraulic structures which allow the upstream migration of fish through obstructions in rivers. The appropriate design of these devices should take into account the behavior and biological requirements of the target fish species. However, little is known at the present time about fish behavior in these artificial conditions, which hinders the development of more effective fishway design criteria. In this work, an efficient technique to study fish trajectories and behavior in vertical slot fishways is proposed. It uses computer vision techniques to analyze images coll

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Peake, S., F. WH Beamish, R. S. McKinley, D. A. Scruton, and C. Katopodis. "Relating swimming performance of lake sturgeon, Acipenser fulvescens, to fishway design." Canadian Journal of Fisheries and Aquatic Sciences 54, no. 6 (1997): 1361–66. http://dx.doi.org/10.1139/f97-039.

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Fishways have traditionally been designed to provide safe passage for jumping fish and only recently have nonjumping species been considered. Concern over dwindling populations of lake sturgeon, Acipenser fulvescens, has focused attention on fishway designs that accommodate its swimming abilities. The objective of this study was to derive a model that relates swimming endurance of lake sturgeon to length and flow characteristics of fishways. Endurance at sustained and prolonged swimming speeds (those maintainable for more than 20 s) increased with water temperature but was independent of tempe

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Qi, Shengzhe, Chenghua Fu, and Meiling Xie. "Analysis of Two-Dimensional Hydraulic Characteristics of Vertical-Slot, Double-Pool Fishway Based on Fluent." Water 16, no. 12 (2024): 1695. http://dx.doi.org/10.3390/w16121695.

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Research shows that the novel vertical-slot, double-pool fishway can reduce the flow velocity at the vertical slots of the fishway, enhance the efficiency of the water flow in the chambers, and increase the fish passage area and migratory corridor for fish. Utilizing Fluent, two-dimensional and three-dimensional models of the novel fishway were established, and numerical simulation analysis was conducted on their hydraulic characteristics. The results indicate that the flow velocity at the cross-section of the middle vertical slot in the fishway pool decreases horizontally from left to right a

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Bravo-Córdoba, Francisco Javier, Ana García-Vega, Francisco Fuentes-Pérez Juan, Leandro Fernandes-Celestino, Sergio Makrakis, and Francisco Javier Sanz-Ronda. "Bidirectional connectivity in fishways: A mitigation for impacts on fish migration of small hydropower facilities." Aquatic Cpnservation: Marine and Freshwater Ecosystems 33, no. 6 (2023): 549–65. https://doi.org/10.1002/aqc.3950.

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Most freshwater fish need to move freely through rivers to complete their life cycles. Thus, river barriers 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. 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 salmo

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Quaresma, Ana L., Filipe Romão, and António N. Pinheiro. "A Comparative Assessment of Reynolds Averaged Navier–Stokes and Large-Eddy Simulation Models: Choosing the Best for Pool-Type Fishway Flow Simulations." Water 17, no. 5 (2025): 686. https://doi.org/10.3390/w17050686.

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Fishways are an important solution for mitigating the ecological impacts of river barriers, with their hydrodynamics playing a key role in their effectiveness. Computational fluid dynamics (CFD) is now one of the main tools to predict and characterize flow hydrodynamics, but choosing the most suitable turbulence model is considered one of its main challenges. Although substantial research has been carried out on vertical slot fishways, where the flow is predominantly two-dimensional, studies on pool-type fishways with bottom orifices remain scarce. In this study, three Reynolds averaged Navier

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Makrakis, Sergio, Francisco Javier Sanz-Ronda, Francisco Javier Bravo-Cordoba, et al. "Enhancing Fish Passage Efficiency: Lessons from UHE Porto Primavera’s Fish Ladder." Sustainability 16, no. 23 (2024): 10704. https://doi.org/10.3390/su162310704.

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Dams severely affect aquatic environments and block the longitudinal migration of fish. In order to mitigate the negative effects generated by these developments, fish passes, or fishways, are implemented in dams with the purpose of restoring river connectivity and allowing the movement of migrants. Nevertheless, fishways in neotropical areas often face design and construction issues that can reduce their efficiency and selectively disadvantage species with limited swimming capabilities. This study analyzes how a fish ladder on the Paraná River influences the black armored catfish (Rhinelepis

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Puzdrowska, Marta, and Tomasz Heese. "Turbulent Kinetic Energy in Bolt Fishway." AgriEngineering 1, no. 2 (2019): 265–82. http://dx.doi.org/10.3390/agriengineering1020020.

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The paper presents an analysis the spatial distribution of turbulent kinetic energy (TKE) for bolt fishways, including the impact of additional spillway slots and fixed channel development. The research was done for two models, each containing a different arrangement of slots. The presented results of research for bolt fishways were obtained as an effect of laboratory tests. The measurements were done for three components of instant flow velocity magnitude (speed). Analysis of the results was done for a 3D flow structure using Matlab software. In the case of bolt fishways, significant differen

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Romão, Filipe, Ana L. Quaresma, José M. Santos, Susana D. Amaral, Paulo Branco, and António N. Pinheiro. "Multislot Fishway Improves Entrance Performance and Fish Transit Time over Vertical Slots." Water 13, no. 3 (2021): 275. http://dx.doi.org/10.3390/w13030275.

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Pool-type fishways have been increasingly tested to improve fish passage performance and minimize migration delays. Designing cost-effective fishways is essential for a trade-off between water uses and successful longitudinal connectivity restoration. The multislot fishway (MSF) concept, which operates with 30–50% lower discharge than a vertical slot fishway (VSF), was recently developed. This study assessed and compared the entrance performance (entrance time; entry efficiency) and transit times of two cyprinids for VSFs and MSFs. Four configurations, with the same structural characteristics

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Keefer, Matthew L., Michael A. Jepson, Tami S. Clabough, and Christopher C. Caudill. "Technical fishway passage structures provide high passage efficiency and effective passage for adult Pacific salmonids at eight large dams." PLOS ONE 16, no. 9 (2021): e0256805. http://dx.doi.org/10.1371/journal.pone.0256805.

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Fishways have been widely used for upstream passage around human-built structures, but ‘success’ has varied dramatically. Evaluation of fishway success has typically been conducted at local scales using metrics such as fish passage efficiency and passage time, but evaluations are increasingly used in broader assessments of whether passage facilities meet population-specific conservation and management objectives. Over 15 years, we monitored passage effectiveness at eight dams on the Columbia and Snake rivers for 26,886 radio-tagged spring-summer and fall Chinook Salmon O. tshwaytscha, Sockeye

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34

Zhang, Di, Chunming Liu, Xiaotao Shi, Yakun Liu, and Yingmin Qu. "A novel H-shape fishway with excellent hydraulic characteristics." Journal of Hydrology and Hydromechanics 71, no. 1 (2023): 64–79. http://dx.doi.org/10.2478/johh-2022-0026.

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Abstract Fishway design not only takes into account the swimming abilities of target fishes, but also considers the hydrodynamic characteristics within the fishway. In this study, the flow fields of one vertical-slot fishway (i.e. VSF), five T-shape fishways (i.e. TSF-1~TSF-5) and two H-shape fishways (i.e. HSF-1 and HSF-2) are numerically simulated by solving the three-dimensional Reynolds-averaged Navier-Stokes equations and the K-Omega-SST turbulence model. The numerical results clearly indicate that the hydrodynamic properties of HSF-2 are overall superior to the remaining seven cases, in

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35

Rajaratnam, N., C. Katopodis, and S. Lodewyk. "Hydraulics of offset baffle culvert fishways." Canadian Journal of Civil Engineering 15, no. 6 (1988): 1043–51. http://dx.doi.org/10.1139/l88-137.

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Abstract (sommario):

This paper presents the results of an experimental study on the hydraulics of culverts with offset baffles to pass fish. Using analytical considerations and experimental observations, a flow equation has been developed between the discharge, diameter, depth, and slope for a culvert fish way with the standard offset baffle system. The velocity field at the slot has also been evaluated. Some further experiments were performed to assess the effect of baffle spacing and height on the hydraulics of the culvert fishway. Key words: culverts, fishways, baffles, hydraulics, open-channel flow, turbulent

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36

Quaresma, Ana, and António Pinheiro. "Modelling of Pool-Type Fishways Flows: Efficiency and Scale Effects Assessment." Water 13, no. 6 (2021): 851. http://dx.doi.org/10.3390/w13060851.

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In this study, the 3D numerical modelling of flow in a pool-type fishway with bottom orifices was performed using computational fluid dynamics (CFD) software (FLOW-3D®). Numerical results were compared with experimental data obtained from acoustic Doppler velocimetry (ADV) and particle image velocimetry (PIV) measurements. Several hydrodynamic variables that influence fishways efficiencies, such as flow depths, flow patterns, water velocity, turbulent kinetic energy, Reynolds normal stresses, and Reynolds shear stress parallel to the bottom component, were qualitatively and quantitatively comp

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37

Dong, Mengxue, Guorui Zeng, Maosen Xu, Jiegang Mou, and Yunqing Gu. "Influence of Valvular Structures on the Flow Characteristics in an Island-Type Fishway." Water 16, no. 16 (2024): 2336. http://dx.doi.org/10.3390/w16162336.

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Abstract (sommario):

Fishways act as ecological corridors, enabling migratory fish species to surmount barriers such as weirs or dams, which are crucial for the restoration of river ecosystems. The island-type fishway is a novel design that utilizes a combination of island structures and valvular configurations to dissipate the kinetic energy of water flow, decelerate the water velocity, and thus reduce the challenge faced by fish attempting to ascend the watercourse. The impact of valvular configurations on the hydrodynamic characteristics within an island-type fishway was explored. The results showed that the ma

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38

Shen, Chunying, Ruiguo Yang, Mingming Wang, Shihua He, and Shan Qing. "Application of Vortex Identification Methods in Vertical Slit Fishways." Water 15, no. 11 (2023): 2053. http://dx.doi.org/10.3390/w15112053.

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Abstract (sommario):

The reproduction and survival of fish are often negatively affected by the construction of dams and other hydroelectric projects, which cut off their migratory routes. Building effective fish passage facilities that allow fish to pass through dams smoothly alleviates the negative impact of hydroelectric projects on the ecological environment, thus protecting the diversity of aquatic species and preventing the extinction of indigenous fish. Vertical slit fishways are highly effective, but turbulence inside the fishway pools directly affects fish passage. In this study, the large-eddy simulation

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39

Wang, Junming, Yuanfeng Gong, Wupeng Deng, Enshun Lu, Xinyu Hu, and Daode Zhang. "Fish Detection in Fishways for Hydropower Stations Using Bidirectional Cross-Scale Feature Fusion." Applied Sciences 15, no. 5 (2025): 2743. https://doi.org/10.3390/app15052743.

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Abstract (sommario):

Fishways can effectively validate the effectiveness and rationality of their construction, optimize operational modes, and achieve intelligent scientific management through fish species detection. Traditional fish species detection methods for fishways are unsuitable due to inefficiency and disruption of the fish ecological environment. Therefore, combining cameras with target detection technology provides a better solution. However, challenges include the limited computational power of onsite equipment, the complexity of model deployment, low detection accuracy, and slow detection speed, all

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40

Duarte, Bernardo Alan de Freitas, Isabella Cristina Resende Ramos, and Hersília de Andrade e. Santos. "Reynolds shear-stress and velocity: positive biological response of neotropical fishes to hydraulic parameters in a vertical slot fishway." Neotropical Ichthyology 10, no. 4 (2012): 813–19. http://dx.doi.org/10.1590/s1679-62252012000400014.

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Abstract (sommario):

The barriers created by dams can cause negative impacts to aquatic communities, and migratory fish species are directly affected. Fishways have been developed to allow the upstream passage of fishes through dams. In Brazil, after the implementation of environmental laws, these structures have been built based on European and American fishway designs. Studies have shown selectivity for different neotropical fishes in some Brazilian fishways, and the main challenge has been to promote upstream passage of a large number of diverse fish species. The patterns of flow circulation within the fish lad

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41

Zhang, Jian, Tianpeng Ruan, and Tingxin Xu. "Simulation study on hydraulic characteristics of Changzhou fishway based on FLUENT." Journal of Physics: Conference Series 2756, no. 1 (2024): 012024. http://dx.doi.org/10.1088/1742-6596/2756/1/012024.

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Abstract (sommario):

Abstract Guangxi Changzhou Fishway is the first significant water conservancy project above the mouth of the Pearl River and also the first large fishway independently designed in China. It is the primary migration channel for six kinds of state-level protected fish, such as Chinese sturgeon and a typical vertical slit fishway. This paper takes the Changzhou fishway as the research object, based on the theory of fluid mechanics, and adopts the method of combining theoretical analysis, experimental research, and numerical simulation to study the flow field of different water depths in the pond.

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42

G. Doupé, Robert, David L. Morgan, and Howard S. Gill. "Prospects for a restorative fishery enhancement of Lake Kununurra: a high-level tropical impoundment on the Ord River, Western Australia." Pacific Conservation Biology 11, no. 2 (2005): 136. http://dx.doi.org/10.1071/pc050136.

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Abstract (sommario):

The high-level irrigation water supply dams of the Ord River in tropical Western Australia impede the movement of Barramundi Lates cafcarifer and other tropical fish species. A recreational Barramundi fishery enhancement of Lake Kununurra using a fishway has been widely promoted as advancing fishery conservation and the reformation of land and water management practices within the greater Ord River region. Of the fishways considered here, none have been found to admit Barramundi in the numbers and size classes necessary to establish or maintain the recreational fishery. Reasons for this includ

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43

Chen, Chang Chun, La Chun Wang, Jie Song, and Xue Zhang Cao. "The Development and Ecological Responses of Fishways under the Legislative Trend of Environmental Flows in China." Applied Mechanics and Materials 361-363 (August 2013): 949–53. http://dx.doi.org/10.4028/www.scientific.net/amm.361-363.949.

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Abstract (sommario):

Fishways play an important role in the mitigation of negative influence of hydraulic projects on fish, and can help maintain river connectivity and fish migration in river ecological systems. Based on the current situation of fishways construction in China, this paper demonstrated the legislative prospect of environmental flows, and analyzed the historical reason of depression of fishways. Focusing on adaptable measures of fishways development to legislative and ecological water requirements, four proposals were provided, which included strengthening the supervision, promoting the ecological i

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44

Sanagiotto, Daniela, Júlia Rossi, and Juan Bravo. "Applications of Computational Fluid Dynamics in The Design and Rehabilitation of Nonstandard Vertical Slot Fishways." Water 11, no. 2 (2019): 199. http://dx.doi.org/10.3390/w11020199.

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Abstract (sommario):

Vertical slot fishways are increasingly common structures for the passage of a wide variety of migratory fish and contribute to the maintenance of fish diversity in fragmented rivers. These structures are designed with several geometric arrangements and, consequently, flow patterns through them can be shaped to present suitable characteristics for the fish species. To aid in the design of vertical slot fishways, a three-dimensional numerical model was used to simulate the flow for different geometric configurations. An existing vertical slot fishway with nonstandard dimensions was initially mo

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45

Schemmel, Avery, David L. Smith, Marcela Politano, Damian Walter, and Jeremy Crossland. "Assessing Zebra Mussels’ Impact on Fishway Efficiency: McNary Lock and Dam Case Study." Water 16, no. 12 (2024): 1671. http://dx.doi.org/10.3390/w16121671.

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Abstract (sommario):

The Columbia River Basin faces a threat from the potential invasion of zebra mussels (Dreissena polymorpha), notorious for their ability to attach to various substrates, including concrete, which is common in fishway construction. Extensive mussel colonization within fishways may affect fish passage by altering flow patterns or creating physical barriers, leading to increased travel times, or potentially preventing passage altogether. Many factors affect mussel habitat suitability including vectors of dispersal, water parameters, and various hydrodynamic quantities, such as water depth, veloci

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46

Heneka, Patrick, Markus Zinkhahn, Cornelia Schütz, and Roman B. Weichert. "A Parametric Approach for Determining Fishway Attraction Flow at Hydropower Dams." Water 13, no. 5 (2021): 743. http://dx.doi.org/10.3390/w13050743.

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Abstract (sommario):

High discharges at hydropower plants (HPP) may mask fishway attraction flows and, thereby, prevent fishes from locating and using fishways critical for their access to upstream spawning and rearing habitats. Existing methods for determining attraction flows are either based on simple guidelines (e.g., a proportion of HPP discharge) that cannot address the spatial and temporal complexity of tailrace flow patterns or complicated studies (e.g., combinations of detailed hydraulic and biological investigations) that are expensive and time-consuming. To bridge this gap, we present a new, intermediat

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47

Rajaratnam, N., C. Katopodis, and R. Paccagnan. "Field studies of fishways in Alberta." Canadian Journal of Civil Engineering 19, no. 4 (1992): 627–38. http://dx.doi.org/10.1139/l92-072.

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Abstract (sommario):

This paper presents a detailed account of field studies performed on one pool-weir and several Denil and vertical slot fishways in the province of Alberta. The pictures show the broad features of the flow. The velocity profiles obtained in the field studies have confirmed the measurements made in the laboratory on scale models and have enhanced the general picture, particularly for the vertical slot fishways. This paper provides hydraulic engineers with information for understanding the primary hydraulic characteristics of fishways. Key words: fishways, field studies, hydraulics, open-channel

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48

LARINIER, M. "BAFFLE FISHWAYS." Bulletin Français de la Pêche et de la Pisciculture, no. 364 supplément (2002): 83–101. http://dx.doi.org/10.1051/kmae/2002109.

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49

Nakai, Masahiko, Taku Masumoto, Takashi Asaeda, and Mizanur Rahman. "Improving the efficiency of adaptive management methods in multiple fishways using environmental DNA." PLOS ONE 19, no. 4 (2024): e0301197. http://dx.doi.org/10.1371/journal.pone.0301197.

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Abstract (sommario):

Dams and weirs impede the continuity of rivers and transit of migratory fish. To overcome this obstacle, fishways are installed worldwide; however, management after installation is important. The Miyanaka Intake Dam has three fish ladders with different flow velocities and discharges and has been under adaptive management since 2012. Fish catch surveys, conducted as an adaptive management strategy, place a heavy burden on fish. Furthermore, a large number of investigators must be mobilized during the 30-day investigation period. Thus, a monitoring method using environmental DNA that exerts no

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50

Rajaratnam, N., C. Katopodis, and N. McQuitty. "Hydraulics of culvert fishways II: slotted-weir culvert fishways." Canadian Journal of Civil Engineering 16, no. 3 (1989): 375–83. http://dx.doi.org/10.1139/l89-061.

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Abstract (sommario):

This paper presents the results of an experimental study on the hydraulics of culvert fishways with a slotted-weir baffle system. Six designs with two baffle heights and three spacings were tested. A flow equation has been developed to predict the flow depth for any given discharge, diameter, and slope. The barrier velocity that would exist at the slot in the baffles has also been predicted in a general manner. This relatively simple slotted-weir baffle system has been found to match the performance of the more complicated but frequently used offset baffle system of similar dimensions. Key wor

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