Influence of T shape baffles arrangement on flow hydraulic characteristics in fishways

Document Type : Research Paper

Authors

Department of Civil Engineering, Faculty of Engineering, University of Birjand, Birjand, Iran.

Abstract

Hydraulic structures constructed along the rivers cause disturbances in the natural process of aquatic life and the ecosystem of the region. In order to solve this problem, fishway structure is widely used to facilitate the communication path between downstream and upstream of hydraulic structures crossing the river and to eliminate the inability of fish to swim upstream and also to facilitate their movement downstream of dams. The different types of this structure should be designed to absorb the type of migratory fish in the area and to pass them safely and out of the outlet, without injuring the fish or creating unnecessary delays for the adult spawning fish. Therefore, in the present study, in order to determine the optimal configuration of the T shape baffles used in the path, three types of arrangements were numerically simulated using OpenFOAM software and K-ε turbulence model. These three types of arrangements are consecutive, alternate and also reversed. Then, the results of the numerical model were validated by comparing it with the results of the related laboratory model. The findings indicate that the numerical model is in good agreement with the laboratory results. Among the three configurations, taking into account different factors, the reverse location of T-shaped baffles with 68.3% backwater, 86.2% flow at less than 0.5 m/s, 84.1% turbulent kinetic energy values less than 0.02 square meters per square second and also 61% energy dissipation percentage, had the best performance.

Keywords

References

  1. FAO, Fish passes: Design, dimensions and monitoring, Deutscher Verband für Wasserwirtschaft und Kulturbau, Rome, 2002.
  2. Mao X, (2018). Review of Fishway Research in China. Ecological Engineering, pp: 115(9): 91-95.
  3. Schwalme K, Mackay WC, Lindner D, (2011). Suitability of Vertical Slot and Denil Fishways for Passing North-Temp. Canadian Journal of Fisheries & Aquatic Sciences, pp: 42(11): 1815-1822.
  4. Mallen-Cooper M, Stuart IG, (2007). Optimising Denil fishways for passage of small and large fishes. Fisheries Management & Ecology, pp: 14(1): 61-71.
  5. Katopodis C., Rajaratnam N., A review and laboratory study of the hydraulics of Denil fishways, Canadian Technical Report of Fisheries and Aquatic Science 1145, Fisheries and Oceans, Winnipeg, Canada, 1983.
  6. Fuentes-Pérez J, Sanz-Ronda F, Azagra A, García-Vega A, (2016). Non-uniform Hydraulic Behavior of Pool-weir Fishways: A Tool to Optimize its Design and Performance. Ecological Engineering, pp: 86: 5-12.
  7. Larinier M., Fishways: biological basis, design criteria and monitoring, FAO of the United Nations, Rome, 2002.
  8. Landsman SJ, Mclellan N, Platts J, Heuvel M, (2018). Nonsalmonid versus Salmonid Passage at Nature-Like and Pool-and-Weir Fishways in Atlantic Canada, with Special Attention to Rainbow Smelt. Transactions of the American Fisheries Society, pp: 147(1): 94-110.
  9. Bombak M, Cetina M, Novak G, (2017). Study on Flow Characteristics in Vertical Slot Fishways Regarding Slot Layout Optimization. Journal of ecological engineering, pp: 107: 126-136.
  10. Quaranta E, Katopodis C, Comoglio C, (2019). Effects of Bed Slope on the Flow Field of Vertical Slot Fishways. River Research and Applications, pp: 35: 1-13.
  11. Stamou AI, Mitsopoulos G, Rutschmann P, Bui M, (2018). Verification of a 3D CFD Model for Vertical Slot Fish-passes. Environmental Fluid Mechanics, pp: 18: 1435-1461.
  12. David BO, Hamer MP, (2012). Remediation of a Perched Stream Culvert with Ropes Improves Fish Passage. Marine and Freshwater Research, pp: 63(5): 440-449.
  13. Cea L, Pena L, Puertas J, (2007). Application of Several Depth Averaged Turbulence Models to Simulate Flow in Vertical Slot Fishways. Journal of Hydraulic Engineering, pp: 133(2): 160-169.
  14. Mao X, Jing-jing F, You-cai T, Rui-dong A, (2012). Influence of Structure on Hydraulic Characteristics of T shape Fishway. Journal of Hydrodynamics, pp: 24(5): 684-691.
  15. Mao X, Study of Fish-Friendly Fishway Hydraulics in Mountainous Rivers of Southwest China. PhD Thesis. Sichuan University, Sichuan, China, 2015.
  16. Mao X, Zhang J, Tang K, Zhao W, (2019). Designs for T Shape Fishways. The Civil Engineering Journal, pp: 28(2): 270-280.
  17. Mao X, Li J, An R, Zhao W, Li K, Li R, Deng Y, Liang X, Yang M, Zhang J, Tang K, (2019). Study of Key Technologies for Fishways in the Plateaus of Western China. Global Ecology and Conservation, pp: 20: 1-12.
  18. Aghebatie B, Hosseini Kh, (2019). Computational Investigation on the Effects of Rib on the Slug Flow Phenomenon; Using OpenFOAM. International Journal of Modern Physics C, pp: 30(6): 1-12.
  19. Leon SA, Ghidaoui A, Schmidt AR, Garcia MH, (2010). A Robust Two-equation Model for Transient-mixed Flows. Journal of Hydraulic Research, pp: 48(1): 44-56.
  20. Hunter L.A., Mayor L., Analysis of fish swimming performance data, North/South Consultants Inc. Winnipeg, Manitoba, Canada, 1986.

Files

Share

How to cite

Statistics