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Long-time 3D CFD modeling of sedimentation with dredging in a hydropower reservoir

  • Sediments, Sec 5 • Sediment Management • Research Article
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Abstract

Purpose

The purpose of the current study was to present a 3D computational fluid dynamics (CFD) model that can be used to predict long-term (11 years) bed changes in a reservoir due to sedimentation and dredging and that can be done with a reasonable computational time (18 h) on a desktop computer.

Materials and methods

The numerical model solved the Navier-Stokes equations on a 3D non-orthogonal unstructured grid to find the water velocities and turbulence. The convection-diffusion equation for suspended sediment transport was solved to find the sediment deposition pattern. Bed changes were computed and used to adjust the grid over time. Thereby, bed elevations over time were computed. The effect of dredging was also included in the model, and how this affected the bed elevation changes. The main feature of the numerical model enabling a reasonable computational time was implicit numerical methods giving the possibility to use long time steps.

Results and discussion

The results were compared with annually measured bed elevation changes in the reservoir over 11 years. This gave 11 figures of bed elevation changes, due to the combined effect of sedimentation and dredging. Comparing the annually computed and measured bed changes, there was a fair agreement for most of the years. The main deposition patterns were reproduced. The amount of sediments removed in three dredging campaigns were also computed numerically and compared with the measured values. Parameter tests were done for the grid size, fall velocity of the sediments, cohesion, and sediment transport formula. The deviation between computed and measured dredged sediment volumes was less than 16% for all these four parameters/formulas.

Conclusions

The 3D CFD numerical model was able to compute water flow, sediment transport, and bed elevation changes in a hydropower reservoir over a time period of 11 years. Field measurements showed reasonable agreement with the computed bed elevation changes. The results were most sensitive to the sediment particle fall velocity and cohesion of the bed material.

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References

  • Astor B, Gehres N, Hillebrand G (2014) From source to mouth, a sediment budget of the Rhine river: grain size distribution of suspended sediment samples in the Rhine and its tributaries. BfG 1798. Bundesanstalt für Gewässerkunde, Koblenz (in German)

  • Banhold K, Frings R, Schüttrumpf H (2017) Sediment budget of the High Rhine and Upper Rhine from Konstanz to Iffezheim. In: Hillebrand G, Frings RM (eds) From source to mouth, the sediment budget of the Rhine river for the period 1991–2010. Report KHR/CHR II-22. International Commission for the Hydrology of the Rhine basin, Lelystad. pp 42–47, ISBN: 978-90-70980-39-9, DOI: https://doi.org/10.5675/KHR_22.2017 (in German)

  • Brignoli ML, Espa P, Batalla RJ (2017) Sediment transport below a small alpine reservoir desilted by controlled flushing: field assessment and one-dimensional numerical simulation. J Soils Sediments 17:2187–2201

    Article  CAS  Google Scholar 

  • Ðorde̵vic D (2013) Numerical study of 3D flow at right-angled confluences with and without upstream planform curvature. J Hydroinf 15(4):1073–1088

    Article  Google Scholar 

  • Dorfmann C, Zenz G (2013) Numerical investigations with Telemac at hydropower plants—two case studies. WasserWirtschaft 103(2):41–46

    Article  Google Scholar 

  • Engelund F, Hansen E (1967) A monograph on sediment transport in alluvial streams. Teknisk Forlag, Copenhagen

    Google Scholar 

  • Faghihirad S, Lin B, Falconer RA (2017) 3D layer-integrated modelling of morphodynamic processes near river regulated structures. Water Resour Manag 31:443–460

    Article  Google Scholar 

  • Fang H-W, Rodi W (2003) Three-dimensional calculations of flow and suspended sediment transport in the neighborhood of the dam for the Three Gorges Project (TGP) reservoir in the Yangtze River. J Hydraul Res 41(4):379–394

    Article  Google Scholar 

  • Haun S, Olsen NRB (2012) Three-dimensional numerical modelling of reservoir flushing in a prototype scale. Int J River Basin Manag 10(4):341–349

    Article  Google Scholar 

  • Haun S, Kjærås H, Løvfall S, Olsen NRB (2013) Three-dimensional measurements and numerical modelling of suspended sediments in a hydropower reservoir. J Hydrol 479:180–188

    Article  Google Scholar 

  • Hillebrand G (2014) Sediment analysis of drill core samples from the IKSR investigation of the reservoirs in the Upper Rhine from the years 2000 to 2002. KLIWAS-Report series, KLIWAS-56/2014, pp. 63. Federal Institute of Hydrology, Koblenz (in German)

  • Hillebrand G, Otto W, Vollmer S (2012) Findings from ADCP-measured flow velocities and suspended sediment concentrations at the Upper Rhine. 2nd IAHR Europe Conference, Munich, Germany

  • Hillebrand, G, Otto, W, Schmegg, J, Vollmer, S, Gehres, N (2015) Upgrading the suspended sediment measurement network of the German Waterways and Shipping Administration. BfG-Report Nr. 1799, Federal Institute of Hydrology, Koblenz (in German)

  • Hillebrand G, Klassen I, Olsen NRB (2017) 3D CFD modelling of velocities and sediment transport in the Iffezheim hydropower reservoir. Hydrol Res 48(1):147–159

    Article  Google Scholar 

  • Jia D-D, Shao X, Zhang X, Ye Y (2013) Sedimentation patterns of fine-grained particles in the dam area of the Three Gorges project: 3D numerical simulation. J Hydraul Eng 139(6):669–674

    Article  Google Scholar 

  • Launder BE, Sharma BI (1974) Application of the energy dissipation model of turbulence to the calculation of flow near a spinning disc. Lett Heat Mass Trans 1(2):131–138

    Article  Google Scholar 

  • Mahmood K (1987) Reservoir sedimentation: impact, extent and mitigation. World Bank Technical Paper 71, Washington, DC

  • Mirbach S, Lang U (2017) Density-driven underflows with suspended solids in Lake Constance. J Soils Sediments. https://doi.org/10.1007/s11368-017-1753-x

  • Noack M, Hillebrand G, Seidenkranz U, Wieprecht S (2016) Investigation of erosion stability of cohesive sediment deposition in the spillway channel of the Iffezheim barrage at the Rhine river. Hydrol Wasserbewirtsch 60(3):164–175 (in German)

    Google Scholar 

  • Olsen NRB (2015) Four free surface algorithms for the 3D Navier-Stokes equations. J Hydroinf 17(6):845–856

    Article  Google Scholar 

  • Papanicolaou AN, Elhakeep M, Krallis G, Prakash S, Edinger J (2008) Sediment transport modeling review—current and future developments. J Hydraul Eng 134(1):1–14

    Article  Google Scholar 

  • Patankar SV (1980) Numerical heat transfer and fluid flow. McGraw-Hill Book Company, New York ISBN 9780891165224

    Book  Google Scholar 

  • Pohlert T, Hillebrand G, Breitung V (2011) Trends of persistent organic pollutants in the suspended matter of the River Rhine. Hydrol Process 25:3803–3817

    Article  CAS  Google Scholar 

  • Råman Vinnå L, Wüerst A, Bouffard D (2017) Physical effects of thermal pollution in lakes. Water Resour Res 53(5):3968–3987

    Article  Google Scholar 

  • van Rijn LC (1984a) Sediment transport. Part II: suspended load transport. J Hydraul Eng 110(11):1613–1641

    Article  Google Scholar 

  • van Rijn LC (1984b) Sediment transport. Part I: bed load transport. J Hydraul Eng 110(10):1431–1456

    Article  Google Scholar 

  • Ruether N, Singh JM, Olsen NRB, Atkinson E (2005) Three-dimensional modelling of sediment transport at water intakes. Proceedings of the Institution of Civil Engineers, UK. Water Manag 158:1–7

    Google Scholar 

  • Schlichting H (1979) Boundary layer theory. McGraw-Hill Book Company, New York ISBN 978-3-662-52919-5

    Google Scholar 

  • Shields A (1936) Use of dimensional analysis and turbulence research for sediment transport, Preussen Research Laboratory for Water and Marine Constructions, publication no. 26, Berlin (in German)

  • Stamou A, Gkesouli A (2015) Modeling settling tanks for water treatment using computational fluid dynamics. J Hydroinf 17(5):745–762

    Article  Google Scholar 

  • Thapa BS, Dahlhaug OG, Thapa B (2017) Sediment erosion induced leakage flow from guide vane clearance gap in a low specific speed Francis turbine. Renew Energy 107:253–261

    Article  Google Scholar 

  • Tritthart M, Gutknecht D (2007) 3-D computation of flood processes in sharp river bends. Proc Inst Civil Eng Water Manag 160(4):233–247

    Article  Google Scholar 

  • Vidmar J, Zuliani T, Novak P, Drinčić A, Ščančar J, Milačič R (2017) Elements in water, suspended particulate matter and sediments of the Sava River. J Soils Sediments 17:1917–1927. https://doi.org/10.1007/s11368-016-1512-4

    Article  CAS  Google Scholar 

  • Winterwerp JC, van Kesteren WGM (2004) Introduction to the physics of cohesive sediment in the marine environment. Elsevier, ISBN 978-0-444-51553-7

  • Zanke U (1977) Computation of fall velocities for sediments, Mitteilungen des Franzius-Instituts für Wasserbau und Küsteningenieurwesen der TU Hannover, Vol. 46 (in German)

  • Zhang Q, Hillebrand G, Hoffmann T, Hinkelmann R (2017) Estimating long-term evolution of fine sediment budget in the Iffezheim reservoir using a simplified method based on classification of boundary conditions, Geophysical Research Abstracts. Vol. 19, EGU2017-9039, EGU General Assembly 2017

  • Zinke P, Olsen NRB, Bogen J (2011) 3D numerical modeling of levee depositions in a Scandinavian freshwater delta. Geomorphology 129:320–333

    Article  Google Scholar 

Download references

Acknowledgements

The authors would like to thank the German Waterways and Shipping Administration for providing the data for the current study.

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Correspondence to Nils Reidar B. Olsen.

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Responsible editor: Haihan Zhang

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Olsen, N.R.B., Hillebrand, G. Long-time 3D CFD modeling of sedimentation with dredging in a hydropower reservoir. J Soils Sediments 18, 3031–3040 (2018). https://doi.org/10.1007/s11368-018-1989-0

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  • DOI: https://doi.org/10.1007/s11368-018-1989-0

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