Attraction efficiency in natural-like fishways according to weir operation and bed change in Nakdong River, Korea

Baek, Kyong Oh; Ku, Young Hun; Kim, Jae Won

doi:10.1016/j.ecoleng.2015.09.055

Cited by 14 publications

(9 citation statements)

References 9 publications

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“…Rodríguez, Agudo, Mosqueira, & González, , Keefer et al, , Fould & Lucas ) and whether these profiles were within the range of species swimming abilities or their relative influence on passage success (Branco, Santos, Katopodis, Pinheiro, & Ferreira, ; Castro‐Santos, ; Haro, Castro‐Santos, Noreika, & Odeh, ; Santos et al, ). However, it is known that important metrics of fishway performance, such as fish guidance and attraction, also depend on species behaviour, their migration timing, and motivation (Kemp, ), which in turn can be influenced by environment factors such as river discharge, water temperature, turbidity, light intensity, among others (e.g., Baek, Ku, & Do, ; Green, Lindmark, Lundstrom, & Gustavsson, ; Haro & Kynard, ; Larinier, ; Noonan et al, ). These variables can dramatically change, at different scales, near hydraulic infrastructures, diminishing or modifying abiotic cues (Hardisty, ), and the stimulus for the upstream migration of species.…”

Section: Introductionmentioning

confidence: 99%

Proposals for optimizing sea lamprey passage through a vertical‐slot fishway

et al. 2019

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Movement of sea lamprey through a vertical-slot fishway (built at the Coimbra dam, in central Portugal) was continuously monitored between 2013 and 2016 by a video recording system. Visual count data were used to quantify the overall successful movements and identify seasonal and circadian patterns of fishway use. Explicative models (Boosted Regression Trees) were used to study the relationship between frequency of successful movements during the species migration peak and environmental variables. The aim of the study was to identify predictors that may be related with successful sea lamprey upstream migration through the fishway. Collected information was used to support further management recommendations for optimizing the fishway performance. During the 4-year study, near 50,000 lampreys successfully negotiated the Coimbra dam fishway reaching the upper stretch of river Mondego.Migratory peak occurred between April and May with an increase in passages during the night period (between 11 p.m. and 6 a.m.). It was observed an increase in use frequency that was related with the combined effect of flow and temperature. Higher passages were achieved when Coimbra dam discharge flows are lower than 100 m 3 /s and temperature between 15 and 19°C. Flow discharges higher than 150 m 3 /s seemed to inhibit successful sea lamprey passage. In dry years, when flows are almost constantly lower than 50 m 3 /s, temperature was the most important factor influencing fishway use.

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Section: Introductionmentioning

confidence: 99%

Proposals for optimizing sea lamprey passage through a vertical‐slot fishway

et al. 2019

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“…However, most existing hydraulic analyses performed regarding fishway research have been focused on the interior of fishway. Only a small number of studies such as [8,9] have analyzed the areas near the fishway.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of By-Pass Fishway Operation for Attraction Efficiency Based on GPS Drifter Field Experiments

Baek

Lee

Ku³

et al. 2021

Water

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The attraction efficiency of a by-pass fishway installed at Gangjeong-Goryeong Weir on the Nakdong River in South Korea was evaluated according to flow rate variation of the main channel. Optimal flow rate that achieved the maximum value of attraction efficiency at the fishway entrance was also determined. The weir can adjust the flow rate of the main channel and the fishway by operating sluice gates. The weighted usable area (WUA) calculated on the basis of habitat suitability criteria (HSC) for target species using River2D (a two-dimensional physical habitat model) was regarded as an indicator of attraction efficiency. The simulated velocity field by River2D was validated by virtue of measured data acquired from GPS drifter field experiments. Additionally, monthly fish monitoring data obtained with a fish trap served as supporting data to confirm the validity of the estimated attraction efficiency. The monitoring results revealed that the fishway attraction efficiency was the highest during the spawning season (from April to June). The target fish used the fishway most frequently in April. However, many other fish species used the fishway in June. Simulation results revealed that the flow rate of the main channel at the weir should be maintained at 190 m3/s in order to most effectively attract the target fish species into the fishway entrance. Managing the optimal flow rate by operating the sluice gate is especially important during the spawning season of the target fish to facilitate upstream and downstream migration.

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“…Since their initial construction, nature-like fishways have been widely used in Germany, Switzerland, Finland, Australia, Japan and many other countries [9][10][11]. Nature-like fishways are built with diverse materials, such as combinations of gravel, rocks, boulders, wood and riparian a rubble wall.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on the Hydraulic Characteristics of Nature-Like Fishways

Zheng

Niu

Sun

et al. 2020

Water

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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. The mean flow velocity of the FPPW fishway was larger than that of the other schemes. For the fishway arranged with an IPW, the flow information was basically consistent with that of the engineered technical fishway. In the FPPW or SPPW fishway, there was more abundant flow information and no obvious recirculation zones in the fishway pool, and these conditions are suitable for migratory fish moving up- and downstream. Notably, for the fishway arranged with two fish passages, two mainstreams were formed in the pool, which divided the flow pattern of the pool into three flow regions. A weak recirculation area was formed in the low-velocity region, which facilitates swimming for migratory fish. According to this comprehensive comparative study, the SPPW fishway with two fish passages had low discharge, abundant flow information and favorable fish migration characteristics; thus, it is the optimal fishway scheme among those studied in this paper.

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Attraction efficiency in natural-like fishways according to weir operation and bed change in Nakdong River, Korea

Cited by 14 publications

References 9 publications

Proposals for optimizing sea lamprey passage through a vertical‐slot fishway

Proposals for optimizing sea lamprey passage through a vertical‐slot fishway

Evaluation of By-Pass Fishway Operation for Attraction Efficiency Based on GPS Drifter Field Experiments

Comparative Study on the Hydraulic Characteristics of Nature-Like Fishways

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