Study on the Swimming Behavior of Black Carp (Mylopharyngodon piceus) and Silver Carp (Hypophthalmichthys molitrix) in Early Developmental Stage DOI Creative Commons
Junjun Tan, Xueqin Zhu, Junjian Sun

et al.

Animals, Journal Year: 2024, Volume and Issue: 14(22), P. 3221 - 3221

Published: Nov. 10, 2024

Fish need to make different responses water flow conditions, as a variety of fish utilize or overcome the while are in water. This study aims analyze response two types carp (black and silver carp) body lengths (2.0-10.0 cm) early developmental stages an open channel. By analyzing velocity swimming behavior, against was most frequent frequencies this behavior increased with length fish. The results demonstrated that detectable species remained certain range (0.020-0.060 m/s). Black can swim 0.295-0.790 m/s 0.245-0.825 m/s, respectively. provide invaluable data for engineers biologists protect stage restore ecological habitats regulated river systems.

Language: Английский

Three-Dimensional Particle Tracking Velocimetry Investigation of Flow Dynamics Around Simplified Stones at Low Submergence: Implications for Instream Habitat DOI Open Access
Dan A. Nilsson, Anders G. Andersson, I. Larsson

et al.

Water, Journal Year: 2025, Volume and Issue: 17(2), P. 217 - 217

Published: Jan. 15, 2025

Shallow waterways such as rapids, tributaries and smaller streams can have important ecological functions in both free-flowing regulated rivers. As more intermittent renewable energy is introduced to the system reduce CO2 emissions, operational conditions of hydropower plants are changing. This implies various flow scenarios that lead locations with shallow depths larger variations water levels velocities, resulting increased impact on riverine ecosystem. Accurate predictions these impacts require an understanding dynamics near large roughness elements boulders or trees river regions. study uniquely investigates effect relative submergence, i.e., depth boulder size, field, turbulence, potential fish habitats around idealized stone shapes (hemispheres) open channel using time-resolved 3D particle tracking velocimetry. The results indicate varying submergence significantly affects recirculation zones, velocity vorticity distribution, well turbulent kinetic energy. Notably, regions lower downstream were generated at submergences, which might be favorable for conservation. Valuable insights into ecohydraulic engineering habitat restoration gained by fundamental mechanisms low elements.

Language: Английский

Citations

0
Numerical Simulation Study on Fish Habitats in the Downstream Section of Yangqu Hydropower Station DOI Creative Commons
Qiaoling Zhang, Yanghui Ou,

Weiying Wang

et al.

Ecology and Evolution, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 1, 2025

To promote the coordinated and sustainable development of hydropower exploitation ecological environment in upper reaches Yellow River, a fine simulation downstream riverway Yangqu Hydropower Station was carried out to analyze impact changes water depth flow velocity on fish habitats after impoundment Station. In this paper, Gymnocypris eckloni selected as target species. The habitat model constructed using MIKE21. quality species graded by fuzzy logic method with suitable conditions. Weighted Usable Area (WUA)-flow response relationship under different qualities studied, required obtained. results indicated that range, derived from between weighted total area variations, ranged 350 1100 m3/s. Furthermore, range determined through proportion WUA 600 1150 After comprehensive analysis, final be high-quality 0.26 0.50, As traffic increased, it first increased then decreased, most affected traffic, medium-quality fluctuated 0.40 0.55, showing an overall upward trend. Meanwhile, low-quality 0.11 0.21, indicating smallest variations. research could provide certain reference for scheduling stations River.

Language: Английский

Citations

0
A multiple‐behaviors virtual fish model for simulating fish trajectory in vertical slot fishways DOI Open Access
Xiaolong Chen, Xiaotao Shi, Xianyu Deng

et al.

Journal of Fish Biology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Abstract Fishways are essential for restoring river connectivity and facilitating fish migration, necessitating ongoing research efficiency optimization. This study developed a behavior model to optimize fishway cost‐effectively. The simulates swimming trajectories of Schizothorax wangchiachii within vertical slot incorporating upstream behavior, random obstacle avoidance, speed variations. simulated trajectory exhibits high consistency with 20 real trajectories, achieving overlap rate 86.7%. result highlights the model's ability accurately simulate movements, demonstrating its significant potential revolutionize design.

Language: Английский

Citations

0
Movements of mesopotamian barb (Capoeta damascina) in a river stretch impacted by small hydropower operations in Ceyhan River Basin, Turkey DOI
Serhat Küçükali, Ahmet Alp, Adil Akyüz

et al.

Hydrobiologia, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Language: Английский

Citations

0
Effects of ramp width variation on the hydraulic conditions of spillway that affect downstream migrating fish DOI Creative Commons
Seyed Sobhan Aleyasin, Sedem Kumahor, Mark F. Tachie

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: March 18, 2025

An experimental investigation was conducted to elucidate the effects of a 45º upstream spillway ramp with varying spanwise width ratios (10%, 25%, 50%) on turbulent flow characteristics used guide fish downstream. A particle image velocimetry system employed acquire velocity field in several vertical and planes analyze various statistics including mean velocities, spatial gradient, Reynolds stresses kinetic energy. The results indicate that topology depends significantly ratio. However, regardless ratio, recirculation region observed near foot smaller one formed ramp. For 10% bubble accompanied by lower velocity, gradient energy along test channel generate more favorable pathway for downstream migrating fish. Although partial-width (i.e., ratio) is less costly easier retrofit compared full-width ramp, it creates some inhomogeneity which may impact migration route time species, particularly those swim close riverbed.

Language: Английский

Citations

0
Spatial and temporal variability of physicochemical characteristics in Lancang River sediments amid hydropower development DOI
Nian Zhang,

Kaidao Fu,

Yidi Han

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 958, P. 177737 - 177737

Published: Dec. 5, 2024

Language: Английский

Citations

1
Study on the Swimming Behavior of Black Carp (Mylopharyngodon piceus) and Silver Carp (Hypophthalmichthys molitrix) in Early Developmental Stage DOI Creative Commons
Junjun Tan, Xueqin Zhu, Junjian Sun

et al.

Animals, Journal Year: 2024, Volume and Issue: 14(22), P. 3221 - 3221

Published: Nov. 10, 2024

Fish need to make different responses water flow conditions, as a variety of fish utilize or overcome the while are in water. This study aims analyze response two types carp (black and silver carp) body lengths (2.0-10.0 cm) early developmental stages an open channel. By analyzing velocity swimming behavior, against was most frequent frequencies this behavior increased with length fish. The results demonstrated that detectable species remained certain range (0.020-0.060 m/s). Black can swim 0.295-0.790 m/s 0.245-0.825 m/s, respectively. provide invaluable data for engineers biologists protect stage restore ecological habitats regulated river systems.

Language: Английский

Citations

0