Hydraulic characteristics by weir type in a pool-weir fishway

Kim, J.H.

doi:10.1016/s0925-8574(00)00125-7

Cited by 38 publications

(24 citation statements)

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“…Overall, the use of an offset orifice arrangement was found to be more beneficial for Iberian barbel, as shown by a significantly higher rate of passage success relative to a straight orifice configuration. In a study conducted to search for an optimal design of cross-walls in a pool-type fishway, Kim (2001) found that cross-walls installed in a straight configuration were preferable to the ones in an offset configuration, since the former made the flow stable and created possible resting places for fish. However, the results of his study were not validated a posteriori through the assessment of passage success by any target fish populations.…”

Section: Discussionmentioning

confidence: 99%

Passage efficiency of offset and straight orifices for upstream movements of Iberian barbel in a pool‐type fishway

Silva

Santos

Ferreira

et al. 2010

River Research & Apps

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Although coarse fish species are frequently the predominant taxa found in rivers, they are often neglected in fish passage studies. Detailed knowledge on the impact of hydraulics on the movements and swimming performance of these species is very limited. In this study, offset and straight orifices in a pool‐type fishway prototype were tested in terms of their suitability for Iberian barbel's (Luciobarbus bocagei) upstream movements. The effects of water velocity and turbulence descriptors on fish swimming performance were herein also analysed. Overall, the offset configuration was found to have a significantly higher rate of fish passage success (68%) than the straight arrangement (28%). The time taken to successfully negotiate the fishway was also significantly lower when it featured an offset configuration, particularly for small adults. Of all analysed hydraulic parameters, Reynolds shear stress (RSS) seemed to be the one that most strongly influenced the movements of Iberian barbel within the fishway. The findings provide evidence that the barbel's swimming performance and capacity to successfully migrate upstream through a fishway strongly depend on the arrangement of orifices and turbulence, in particular RSS, within a fish pass. More detailed research focusing on other ‘weak’ swimmers is recommended to improve future designs of pool‐type fishways suitable for other coarse species. Copyright © 2010 John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 99%

Passage efficiency of offset and straight orifices for upstream movements of Iberian barbel in a pool‐type fishway

Silva

Santos

Ferreira

et al. 2010

River Research & Apps

View full text Add to dashboard Cite

show abstract

“…In the lower planes, the velocity field resembles the flow structures developed in a VSF, as shown in Figure 2a-c. NOF designs exhibit more complex flow patterns, which are clearly three-dimensional. The wide variability in the circulation patterns is dependent upon the pool and cross-wall design, as well as on the discharge supplied, which can change the flow regime between streaming and plunging modes [73,84]. A surface stream with high velocities flows over the crest of the notches or slots under streaming regime (Figure 2e), whereas, under plunging regime, a water plunge from the upstream to the downstream pool is formed ( Figure 2d).…”

Section: Flow Pattern Velocity Distribution and Turbulence Levels Inmentioning

confidence: 99%

Pool-Type Fishway Design for a Potamodromous Cyprinid in the Iberian Peninsula: The Iberian Barbel—Synthesis and Future Directions

et al. 2020

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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 research on pool-type fishways for upstream passage of the Iberian barbel and derive recommendations of design criteria for pool-type fishways for this species and others of similar biomechanics capacities. Ultimately, we identify research needs to improve upstream passage of this species.

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“…Understanding and estimating the hydraulic characteristics are prerequisite to make the optimal shapes of fishways. Most of the earlier studies of fishways have been focused on the flow structure by means of hydraulic models (Wu et al, 1999;Kim, 2001) and field observations (Izumi et al, 2000). Tsujimoto and Shimizu (1996) applied a numerical simulations based on k-ε turbulence model to flows in stream-type fishways: Denil type, superactive-type, bottom baffles and Alaska steep pass.…”

Section: Introductionmentioning

confidence: 99%

A numerical study on hydraulic characteristics in the ice Harbor-type fishway

Kim

Yoon

et al. 2012

KSCE J Civ Eng

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Recently various types of fishways have been developed and constructed in order to preserve diversity of fish species and restore the riverine ecological system. Some of the fishways in Korea, however, seem to be designed and installed without careful study on their functions and swimming characteristics of target fishes. The present study aims to elucidate proper hydraulic characteristics of the Ice Harbor-type fishway. In the present study, we analyzed the hydraulic characteristics depending on changes in the spans of walls in the Ice Harbor-type fishways, by using Flow-3D, a three dimensional numerical simulation program. Two physical experiments were performed to verify the results of the program. The comparison between the physical model and the numerical model showed that the results of the numerical model are in good agreement with the physical opponent. A series of numerical simulation were performed with various pool-aspect ratios (the ratio of span of fishway to its width). The numerical simulations revealed that, as the spans of baffles widens, the flow velocities of entire area decreases and the flow velocity of orifice area increases. The results showed that the pool aspect ratio should be larger than 1.0 to avoid the streaming flow, where fish could not ascend easily. As the ratio increases, the recirculation zone develops at the vertical plane and the flow condition becomes an inclined flow, which is the proper condition for fish ascending.

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Hydraulic characteristics by weir type in a pool-weir fishway

Cited by 38 publications

References 0 publications

Passage efficiency of offset and straight orifices for upstream movements of Iberian barbel in a pool‐type fishway

Passage efficiency of offset and straight orifices for upstream movements of Iberian barbel in a pool‐type fishway

Pool-Type Fishway Design for a Potamodromous Cyprinid in the Iberian Peninsula: The Iberian Barbel—Synthesis and Future Directions

A numerical study on hydraulic characteristics in the ice Harbor-type fishway

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