Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Computational Fluid Dynamics Simulation of Flow Pattern Change in the Andong-Imha Reservoir Connecting Tunnel Due to Fish Exclusion Screens

어류 차단 스크린 설치에 따른 안동-임하호 연결터널 내 흐름변화에 대한 전산유체동역학 수치모의

  • Received : 2014.07.22
  • Accepted : 2014.08.12
  • Published : 2014.09.30
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Abstract

Imha Reservoir is connected to Andong Reservoir via a diversion tunnel allowing water to pass between. The diversion tunnel is equipped with screens to exclude exotic largemouth bass due to their predatory impacts on prey assemblages resulting in a degradation of species richness of local fish fauna and extinction of local fish populations in Korea. Flow pattern changes resulting from the fish screens and trash racks were investigated using a computational fluid dynamics (CFD) model. Numerical simulations showed that the decrease in the discharge capacity of the tunnel is approximately 8.6% and the headloss coefficient for fish screen at Andong intake tower was determined to be 1.5. In order not to allow the small fishes enough to pass through the wire openings enter into Imha Reservoir through tunnel, the velocity in the tunnel should be greater than 1.48 m/s which is a critical ascending velocity of the bass. This study suggests that it can keep the velocity higher enough to exclude largemouth bass when a gate opens with the condition of 1.0m difference in water stage between two reservoirs.

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References

  1. An, K. G. (2014). Estimation of Critical Ascending Velocity for Largemouth Bass, K-water Consulting Report. [Korean Literature].
  2. Bartzanasa, T., Boulardb, T., and Kittasa, C. (2002). Numerical Simulation of the Airflow and Temperature Distribution in a Tunnel Greenhouse Equipped with Insect-proof Screen in the Openings, Computers and Electronics in Agriculture, 34(1-3), pp. 207-221. https://doi.org/10.1016/S0168-1699(01)00188-0
  3. Bureau of Reclamation. (1987). Design of Small Dams, 3rd Edition, Denver, CO.
  4. Clark, S. P., Tsikata, J. M., and Haresign, M. (2010). Experimental Study of Energy Loss through Submerged Trashracks, Journal of Hydraulic Research, 48(1), pp. 113-118. https://doi.org/10.1080/00221680903566026
  5. Flow Science. (2014). User Guide and Manual Flow-3D Version 11, Santa Fe, NM.
  6. Hirt, C. W. (1993). Volume-fraction Techniques: Powerful Tools for Wind Engineering, Journal of Wind Engineering and Industrial Aerodynamics, 46-47, pp. 327-338. https://doi.org/10.1016/0167-6105(93)90298-3
  7. Ho, J., Coonrod, J., Hanna, L. J., and Mefford, B. W. (2011). Hydrodynamic Modelling Study of a Fish Exclusion System for a River Diversion, River Research and Applications, 27(2), pp. 184-192. https://doi.org/10.1002/rra.1349
  8. Kirschmer, O. (1926). Untersuchungen uber den Gefallsverlust an Rechen, Mitteilungen des hydraulischen Instituts der TH Munchen, Munich, Germany.
  9. K-water. (2012). Detailed Design Report for Andong-Imha Connection Tunnel Construction Project, K-water. [Korean Literature].
  10. Osborn, J. (1968). Rectangular-bar Trashrack and Baffle Headlosses, Journal of Power Division, 94(2), pp. 111-123.
  11. Padmanabhan, M. and Vigander, S. (1978). Pressure Drop Due to Flow Through Fine Mesh Screens, Journal of the Hydraulics Division, 104(8), pp. 1191-1195.
  12. Park, H. S. and Chung, S. W. (2014). Water Transportation and Stratification Modification in the Andong-Imha Linked Reservoirs System, Journal of Korean Society on Water Environment, 30(1), pp. 31-34. [Korean Literature] https://doi.org/10.15681/KSWE.2014.30.1.031
  13. Raynal, S., Courret, D., Chatellier, L., Larinier, M., and David, L. (2013). An Experimental Study on Fish-friendly Trashracks-Part 1. Inclined Trashracks, Journal of Hydraulic Research, 51(1), pp. 56-66. https://doi.org/10.1080/00221686.2012.753646
  14. U.S. Forest Service. (2006). FishXing User Manual and Reference, U.S. Forest Service.
  15. Yakhot, V., Orszag, S. A., Thangam, S., Gatski, T. B., and Speziale, C. G. (1992). Development of Turbulence Models for Shear Flows by a Double Expansion Technique, Physics of Fluids, 4, pp. 1510-1520. [Korean Literature]. https://doi.org/10.1063/1.858424
  16. Yang, H. C., Ryou, H. S., and Lim, J. H. (1996). A Study of Applicability of a RNG $k-{\epsilon}$ Model, Transactions of the Korean Society of Mechanical Engineers B, 21(9), pp. 1149-1164.
  17. Zong, Q. L. and Zheng, T. G. (2012). Numerical Simulation on Flow Field of Screen Filter for Drip Irrigation in Field, Applied Mechanics and Materials, 212-213, pp. 1197-1200. https://doi.org/10.4028/www.scientific.net/AMM.212-213.1197