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Introduction: Programme of the week Methodology Data used Software 1D (MIK E 11, ISIS, HEC-RAS)

PRESENTATION PLAN. Introduction: Programme of the week Methodology Data used Software 1D (MIK E 11, ISIS, HEC-RAS) Software 2D (MIKE 21, MIKE 21FM, TELEMAC 2D) Co mparison of software C onclusions. 11. 21. 21 FM. PROGRAMME OF THE WEEK. Prepare data. METHODOLOGY. DATA USED.

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Introduction: Programme of the week Methodology Data used Software 1D (MIK E 11, ISIS, HEC-RAS)

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  1. PRESENTATION PLAN • Introduction: • Programme of the week • Methodology • Data used • Software 1D (MIKE 11, ISIS, HEC-RAS) • Software 2D (MIKE 21, MIKE 21FM, TELEMAC 2D) • Comparison of software • Conclusions 11 21 21 FM

  2. PROGRAMME OF THE WEEK Prepare data

  3. METHODOLOGY

  4. DATA USED • Study zone → Lower Var (6300 m of river from sea) - Period → Flood event 2011- From 04/11/2011 to 11/11/2011 • DEM → 15m resolution • Upper boundary condition → Hydrograph in La Manda bridge (peak discharge = 1200m3/s) • Lower boundary condition → Sea level • Roughness coefficient → 20 (Strickler) = 0,05 (Manning)

  5. SOFTWARE 1D 11

  6. All based on the equations of mass and momentum conservation SOFTWARE 1D 11 MASCARET

  7. Observed Stage and Discharge

  8. MIKE 11 - Results 11

  9. ISIS - Results

  10. HEC-RAS - Results 05/11/2011 11h00

  11. SOFTWARE 2D 21 FM 21

  12. SOFTWARE 2D 21 21FM Abily et al. 2016

  13. MIKE 21- Results 21

  14. MIKE 21 FM - Results 21 FM

  15. TELEMAC 2D- Results

  16. 11 COMPARISON OF SOFTWARE 21 FM 21

  17. Comparison of water depth at Napoleon III bridge (1D) Derived from results shown in prior slides

  18. Comparison of water level time-series trend (1D) MIKE 11 ISIS HEC-RAS Quite similar graph shape for all ID model simulations

  19. Comparison of water depth at the same time (2D) Mike 21 Mike 21 FM Telemac

  20. Comparison of velocity at the same time (2D) Mike 21 Mike 21 FM Telemac

  21. Comparison of velocity at the same time (2D) Mike 21 Mike 21 FM Telemac

  22. Flood Location (1D & 2D) 2D Softwares and HEC-RAS HEC-RAS and 2D softwares Telemac 2D and HEC-RAS

  23. Time of Flood Appearance

  24. Time for Simulation

  25. 11 CONCLUSIONS 21 FM 21

  26. CONCLUSIONS • 2D models are able to represent the floodplain better • Telemac takes more time to simulate but gives more accurate results in comparison to Mike 21 and Mike 21 FM. - Differences between water levels - Differences between the time when the flood occurs - 1D models are greatly affected by cross-section geometry. Real bathymetry data give better results

  27. REFERENCES • Abyli et al (2016). Procedia Engineering / 154 / 2016 “High-resolution Modelling With Bi-dimensional Shallow Water Equations Based Codes – High-Resolution Topographic Data Use for Flood Hazard Assessment Over Urban and Industrial Environments” by Abily Morgan, Delestre Olivier, Bertrand Nathalie, Duluc Claire-Marie and Gourbesville Philippe. • HEC-RAS Manual, Hydrologic Engineering Center, River Analysis System • ISIS help. http://help.floodmodeller.com/isis/ISIS.htm • Roe, P. (1981, October). Approximate riemann solvers, parameter vectors and difference schemes. Journal of Computational Physics 43(2), 357–372. • Abbot et al. (1967). Abbott, M. B. and Ionescu, F.: On The Numerical Computation Of Nearly Horizontal Flows, J. Hydraul. Res., 5, 97–117 • Preissmann, A. (1961). Propagation des intumescences dans les canaux et rivieres. In `1er congres de l’Association Franc¸aise de Calcul`, Grenoble, France. • MIKE 21 & MIKE 3 FLOW MODEL FM. Hydrodynamic and Transport Module. Scientific Documentation • “Review of Hydraulic Flood Modeling Software used in Belgium, The Netherlands, and The United Kingdom” Daniel Gilles and Matthew Moore August 15th, 2010 International Perspectives in Water Resource Management IIHR – Hydroscience & Engineering University of Iowa, College of Engineering. • Brooks (1982).Brooks AN, Hughes TJR. Streamline upwind Petrov {Galerkin formulations for convection dominated ows with particular emphasis on the incompressible Navier{Stokes equations. Computer Methods in Applied Mechanics and Engineering 1982; 32: 199-259. • Hervouet (2007). Hydrodynamics of Free Surface Flows, Modelling with the Finite-element Method. John Wiley & Sons Ltd., West Sussex, England (2007) 340 pp

  28. THANK YOU FOR YOUR ATTENTION

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