Skip to main content
SpringerLink
Log in

Hydraulic of rock-ramp fishway with lateral slope

  • Original Article
  • Published:
Environmental Fluid Mechanics Aims and scope Submit manuscript

Abstract

For an efficient restoration of ecological continuity, rock-ramp fishways with protruding blocks and lateral slope can allow to conciliate two opposite objectives: sufficiently low flow velocities in some parts of the ramp for fish passage and a large global discharge for attractiveness. Flows in such ramps with several lateral slopes (from 5% to 18.5%), longitudinal slopes (from 1% to 7%) and discharges were investigated experimentally on a one-fifth scale model and numerically with RANS and LES models, to check up their passability compared to ramps with no lateral slope. Results revealed that the methodology for assessing stage-discharge relationship and maximum velocities is still relevant whatever the lateral slope. However, as the lateral slope increases, so does the lateral deviation of the free surface, as well as the transverse and vertical velocities in the emergent part of the ramp, near the submerged part. This is why it appears preferable to limit the transversal slope to a maximum 12% in rock-ramp fishways with protruding blocks. This recommendation is already much higher than the one applied up to now in France (lower or equal to the longitudinal slope, so mostly lower or equal to 4% to 6%) and will allow to reduce the width and thus the cost of the ramp.

Highlights

  • CFD simulation with LES is pertinent to investigate flow in rock-ramp fishway with a transversal slope and protruding blocks either emergent or submerged.

  • Lateral slope up to 12% do not disturb flow in the part where blocks are emergent, which makes it possible to consider lower build-cost fishway.

  • Design procedure for rock-ramp fishway remains valid with lateral slopes with some precautions.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15
Fig. 16
Fig. 17
Fig. 18
Fig. 19

Similar content being viewed by others

References

  1. Amaral SD, Quaresma AL, Branco P, Romão F, Katopodis C, Ferreira MT, Santos AN (2019) Assessment of retrofitted ramped weirs to improve passage of potamodromous fish. Water 11:1–10

    Article  Google Scholar 

  2. Amaral SD, Branco P, Romão F, Ferreira MT, Pinheiro AN, Santos JM (2021) Evaluation of low-head ramped weirs for a potamodromous cyprinid: effects of substrate addition and discharge on fish passage performance stress and fatigue. Water 13:765

    Article  Google Scholar 

  3. Baki ABM, Zhu DZ, Rajaratnam N (2014) Mean flow characteristics in a rock-ramp-type fish pass. J Hydraul Eng 140:156–168

    Article  Google Scholar 

  4. Baki ABM, Zhu DZ, Rajaratnam N (2016) Flow simulation in a rock-ramp fish pass. J Hydraul Eng 142:1–12

    Article  Google Scholar 

  5. Baudoin JM, Burgun V, Chanseau M, Larinier M, Ovidio M, Sremski W, Steinbach P, Voegtle B (2014) Assessing the passage of obstacles by fish. Concepts, Design and Application Onema, Paris, France

    Google Scholar 

  6. Cassan L, Tien T, Courret D, Laurens P, Dartus D (2014) Hydraulic resistance of emergent macroroughness at large froude numbers: design of nature-like fishpasses. J Hydraul Eng 140:1–9

    Article  Google Scholar 

  7. Cassan L, Miranda FC, Laurens P (2023) Hydraulic resistance in rock-ramps fish passes for several shapes of macro-roughness. J Hydraul Eng 149(2):456. https://doi.org/10.1061/JHEND8.HYENG-13096

    Article  Google Scholar 

  8. Cassan L, Laurens P (2016) Design of emergent and submerged rock-ramp fish passes. Knowl Manag Aquat Ecosys 417:1–10

    Google Scholar 

  9. Chorda J, Cassan L, Laurens P (2019) Modeling steep-slope flow across staggered emergent cylinders: application to fish passes. J Hydraul Eng 145:1–14

    Article  Google Scholar 

  10. Chorda J, Larinie M, Thinus Z (2004) A flume study of steep-slope flows above large-scale roughness elements and their applications to fish passes. In: 5th international symposium on ecohydraulics - aquatic habitats: analysis & restoration Madrid, Spain

  11. Dorchies D, Chouet M, Grand F, Cassan L, Richard S, Courret D (2022) Cassiopee a software to bridge the gap between researchers and engineers in hydraulic calculations. In: Proceedings of the 39th IAHR world congress, Granada, Spain

  12. Ducrocq T, Cassan L, Chorda J, Roux H (2017) Flow and drag force around a free surface piercing cylinder for environmental applications. Environ Fluid Mech 17:629–645

    Article  CAS  Google Scholar 

  13. Golpira A, Baki AB, Zhu DZ (2020) Higher-order velocity moments, turbulence scales and energy dissipation rate around a boulder in a rock-ramp fish passage. Sustainability 12:5385

    Article  Google Scholar 

  14. Larinier M, Courret D, Gomes P (2006) Technical guide to the concept on nature-like fishways. Rapport GHAAPPE RA.06.05-V1, 5

  15. Miranda FC, Cassan L, Laurens P, Tran TD (2021) Study of a rock-ramp fish pass with staggered emergent square obstacles. Water 13:1175. https://doi.org/10.3390/w13091175

    Article  CAS  Google Scholar 

  16. Pang ALJ, Skote M, Lim SY (2016) Modelling high Re flow around a 2D cylindrical bluff body using the k-w (SST) turbulence model. Prog Comput Fluid Dyn Int J 16(1):48–57. https://doi.org/10.1504/PCFD.2016.074225

    Article  Google Scholar 

  17. Quaresma AL, Pinheiro AN (2021) Modelling of pool-type fishways flows: efficiency and scale effects assessment. Water 13:851. https://doi.org/10.3390/w13060851

    Article  Google Scholar 

  18. Romdhane H, Soualmia A, Cassan L, Masbernat L (2017) Evolution of flow velocities in a rectangular channel with homogeneous bed roughness. Int J Eng Res 6(3):120–125

    Google Scholar 

  19. Silva AT, Bermúdez M, Santos JM, Rabuñal JR, Puertas J (2020) Pool-type fishway design for a potamodromous cyprinid in the Iberian Peninsula: the Iberian barbel-synthesis and future directions. Sustainability 12:3387

    Article  Google Scholar 

  20. Smagorinsky J (1963) General circulation experiments with the primitive equations: I. The basic experiment. Mon. Weather Rev. 91:99–164

    Article  Google Scholar 

  21. Tran TD, Chorda J, Laurens P, Cassan L (2016) Modelling nature-like fishway flow around unsubmerged obstacles using a 2D shallow water model. Environ Fluid Mech 16:413–428

    Article  CAS  Google Scholar 

Download references

Acknowledgements

The calculations were performed on the Olympe supercomputer at CALMIP, Toulouse, France, which is gratefully acknowledged (Project P20048).

Author information

Authors and Affiliations

  1. CNRS, IMFT, University of Toulouse, Allée du Pr. Camille Soula, 31400, Toulouse, France

    Ludovic Cassan, Flavia C. Miranda & Pascale Laurens

  2. OFB, Pôle Écohydraulique, Allée du Pr. Camille Soula, 31400, Toulouse, France

    Dominique Courret

Authors
  1. Ludovic Cassan
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Flavia C. Miranda
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Pascale Laurens
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Dominique Courret
    View author publications

    You can also search for this author in PubMed Google Scholar

Contributions

LC, FM and DC—wrote the manuscript. LC—computed discharge relationship and analysed results. FM—performed numerical simulations. PL—carried out experiments. All authors reviewed the manuscript.

Corresponding author

Correspondence to Ludovic Cassan.

Ethics declarations

Conflict of interest

The authors declare no conflict of interest.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Cassan, L., Miranda, F.C., Laurens, P. et al. Hydraulic of rock-ramp fishway with lateral slope. Environ Fluid Mech 24, 1–18 (2024). https://doi.org/10.1007/s10652-023-09958-6

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10652-023-09958-6

Keywords

Search

Navigation