Three-dimensional simulation and experimental study for optimising a vertical slot fishway

An, Ru; Jia, Li; Liang, Ruifeng; Tuo, Youcai

doi:10.1016/j.jher.2016.05.005

Cited by 36 publications

(21 citation statements)

References 9 publications

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“…These evaluations are suitable for vertical slot fishways with a low slope and where vertical velocity components are very small in practically the entire pool. For evaluation of structures with higher slopes and detailing of the region near the vertical slot, where there are important vertical components, it is necessary to use three-dimensional (3D) numerical modeling (e.g., ABDELAZIZ, 2013;AN et al, 2016;BALLU et al, 2017;MARRINER et al, 2014).…”

Section: /14mentioning

confidence: 99%

“…The flow in vertical slot fishways has been the subject of prior experimental studies (e.g., BOMBAČ et al, 2014;CALLUAUD et al, 2014;MARRINER et al, 2016;VAN DER VINNE;KATOPODIS, 1986;SOLANKI, 1992;SANAGIOTTO et al, 2012SANAGIOTTO et al, , 2011VIANA;MARTINEZ, 2014;WU;KATOPODIS, 1999) and numerical evaluations (e.g., AN et al, 2016;NOVAK, 2017;MARRINER et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…This relationship is obtained from the Bernoulli equation, assuming that velocities within the pools are insignificant and that the difference in water depth between consecutive pools produces the maximum velocity in the region of the slot, which is the potential theoretical velocity (MARRINER et al, 2014). Some studies (e.g., AN et al, 2016;LIU;ZHU, 2006;MARRINER et al, 2016;TEIJEIRO, 2004;WU;KATOPODIS, 1999) have indicated good agreement between the potential theoretical velocity and the maximum velocity in the slot. However, depending on the ratio of the aperture width to pool size (width and length), the maximum velocity may be underestimated, as reported by Bombač, Četina and Novak (2017), Calluaud et al (2014), Klein and Oertel (2015) and Sanagiotto, Rossi and Bravo (2019), among others.…”

Section: Introductionmentioning

confidence: 99%

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Three-dimensional numerical simulation of flow in vertical slot fishways: validation of the model and characterization of the flow

Sanagiotto

Rossi

Lauffer

et al. 2019

RBRH

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Vertical slot fishways allow energy dissipation as a function of the pool, longitudinal slope, baffle and vertical slot design. The mean and turbulent flow patterns in these structures must be compatible with the fish target. The design of these structures is commonly based on previous successful fishways as well as simplified theoretical equations and empirical relationships. To aid in the design of these structures, a three-dimensional hydrodynamic model was used to simulate the flow, and experimental studies were used to validate the model. The mean velocities, pressures and parameters indicative of turbulence were analyzed. The maximum flow velocities were up to 32% higher than the values obtained using a simplified theoretical equation. The evaluation of the volumetric dissipated power indicated that the mean value for the pool was lower than 150 W/m3; however, analysis of the spatial distribution showed that in some areas, the values can exceed 1000 W/m3. The results indicate that the numerical simulation was able to adequately represent the flow considering the computational cost involved. Accordingly, it can be used as a complementary tool for the design of new fishways and for the analysis of modifications in existing ones.

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Section: /14mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Three-dimensional numerical simulation of flow in vertical slot fishways: validation of the model and characterization of the flow

Sanagiotto

Rossi

Lauffer

et al. 2019

RBRH

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“…Installations of fishways play a major role in enabling anadromous fish migration, which has received extensive attention. Recently, many researchers have committed themselves to engaging in relevant research to more precisely quantitate the hydraulic structure of fishways [4][5][6], and others have studied fish swimming performance [7][8][9][10]. However, it is important to track the movement behavior of target fish considering the hydraulic conditions within a fishway [11][12][13], which remains a key factor in the design of mitigation technology.…”

Section: Introductionmentioning

confidence: 99%

Modeling Fish Movement Trajectories in Relation to Hydraulic Response Relationships in an Experimental Fishway

Tan

Lin

Gao

et al. 2018

Water

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This study developed an IBM (individual-based model) to model fish movement trajectories integrating hydraulic stimulus variables (turbulent kinetic energy (TKE), velocity (V) and strain rate (SR)) to which fish responded, and the rules for individual fish movement. The fish movement trajectories of the target fish, silver carp (Hypophthalmichthys molitrix), were applied to model fish trajectories in a 1% vertical slot fishway at a discharge of 13.5 L/s. Agreement between measured and simulated trajectories implied the plausibility of the movement rules, which illustrated that the fish movement trajectories model has the preliminary ability to track individual fish trajectories for this fishway.2 of 16 etc.). However, these models do not incorporate individual fish movement behavior with hydraulic parameters. The main challenge in modeling fish movement is linking these parameters. The hydraulic information of the fishway is regarded as a stimulus, which is the Eulerian framework, while the response of a fish to a stimulus is an individual-based framework, which can add individuals' behavior and track their movement. One advantage of the individual-based framework is its relevance to internal states, such as environmental conditions or individual heterogeneity [17][18][19][20]. Therefore, an individual-based model (IBM) approach can be applied to model fish movement trajectories in the fishway. Goodwin et al. (2006) [21] developed a model called ELAM (Eulerian-Lagrangian-agent method) using an IBM approach to model fish movement paths at a hydropower dam forebay. Later, Gao et al. (2016) [12] established an Eulerian-Lagrange fish movement model of a fishway. However, the model only considered turbulent kinetic energy (TKE) as a hydraulic stimulus factor. Validation and calibration of a model principally depends on experimental data. Therefore, it is important to consider a more refined model.Before using the IBM approach, one theory was based on the assumption that the response of fish in the experimental fishway was the same [12]. That means the physiological indices were constant, even then the physiological indices may change after a response has been made. If so, the above assumption implied that a fish swam with similar/ average velocity in all the pools in the model.Black carp (Mylopharyngodon piceus), grass carp (Ctenopharyngodon idella), silver carp (Hypophthalmichthys molitrix) and bighead carp (Hypophthalmichthys nobilis), herein called Asian carps, are the most commercially important freshwater fish species in China, especially in the Yangtze River basin. Asian carps are typical potamodromous fish and have typical migratory activities in spawning and nursery periods [8]. Most research has focused on the swimming performance of carps [8], and little is known about how the fish respond to hydraulic stimulus variables in fishways. The commonly used hydraulic parameters include flow velocity and turbulence [22,23]. It has been well recognized that the slots of fishways change the spatial distribution of th...

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“…Due to today's computing power, computational fluid dynamics (CFD) has evolved as a powerful tool for investigating the flow under varying conditions and therefore has a high potential for fishway designs, for both up-and downstream migration. Various researchers applied CFD to investigate upstream fish passages, for example to assess the hydraulic conditions in pool-type fishways [22][23][24][25][26][27] or to optimize the attraction flow of fishway entrances [28,29]. However, downstream migration numerical simulations have been rarely used.…”

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confidence: 99%

Conceptual Approach for Positioning of Fish Guidance Structures Using CFD and Expert Knowledge

et al. 2019

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The longitudinal connectivity of many rivers is interrupted by man-made barriers preventing the up- and downstream migration of fishes. For example, dams, weirs, and hydropower plants (HPP) are insuperable obstructions for upstream migration if no special measures like fish passes are put into effect. While upstream fishways have been implemented successfully and are still being optimized, the focus of current research is more and more on effective fish protection and guiding devices for downstream migration. According to current knowledge fish guidance structures (FGS) have a high potential in supporting the downstream migration by leading fishes to a bypass as an alternative to turbine passage. This work presents a structured and straightforward approach for the evaluation of potential locations of FGS combining traditional dimensioning principles with computational fluid dynamics (CFD) and novel findings from etho-hydraulic research. The approach is based on three key aspects: fish fauna, structural conditions, and hydraulic conditions, and includes three assessment criteria, which are used in an iterative process to define potential FGS locations. The hydraulic conditions can be investigated by means of hydrodynamic 3D simulations and evaluated at cross sections of potential FGS positions. Considering fundamentals of fish biology and ethology allows for rating of the flow conditions and thus for a suitability assessment of various locations. The advantage of the proposed procedure is the possibility to assess FGS configurations without implementing the FGS in the numerical model, thus limiting the computational expense. Furthermore, the implementation of various operation conditions is straightforward. The conceptual approach is illustrated and discussed by means of a case study.

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Three-dimensional simulation and experimental study for optimising a vertical slot fishway

Cited by 36 publications

References 9 publications

Three-dimensional numerical simulation of flow in vertical slot fishways: validation of the model and characterization of the flow

Three-dimensional numerical simulation of flow in vertical slot fishways: validation of the model and characterization of the flow

Modeling Fish Movement Trajectories in Relation to Hydraulic Response Relationships in an Experimental Fishway

Conceptual Approach for Positioning of Fish Guidance Structures Using CFD and Expert Knowledge

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