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Université catholique de Louvain Sandra Soares Frazão, Nicolas le Grelle and Yves Zech

Flood propagation Dam-break flow experiments in idealised representation of complex topography and urban area. Université catholique de Louvain Sandra Soares Frazão, Nicolas le Grelle and Yves Zech. Overview. Work plan within “Flood propagation” theme Numerical modelling

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Université catholique de Louvain Sandra Soares Frazão, Nicolas le Grelle and Yves Zech

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  1. Flood propagationDam-break flow experiments in idealised representation of complex topography and urban area Université catholique de Louvain Sandra Soares Frazão, Nicolas le Grelle and Yves Zech Flood propagation - UCL experiments

  2. Overview • Work plan within “Flood propagation” theme • Numerical modelling • Idealised dam-break flow experiments • In complex topographies • In urban area • Perspectives Flood propagation - UCL experiments

  3. Work plan • Experiments in idealised situations • Complex topographies • Urban area • Numerical modelling • Benchmarks • Case studies Flood propagation - UCL experiments

  4. Overview • Work plan within “Flood propagation” theme • Numerical modelling • Idealised dam-break flow experiments • In complex topographies • In urban area • Perspectives Flood propagation - UCL experiments

  5. Numerical modelling • Finite-volume formulation of the shallow-water equations • Evaluation of fluxes by Roe scheme Flood propagation - UCL experiments

  6. Overview • Work plan within “Flood propagation” theme • Numerical modelling • Idealised dam-break flow experiments • In complex topographies • In urban area • Perspectives Flood propagation - UCL experiments

  7. Dam-break flow experiments • Complex topographies • Dams built in mountainous areas • steep, dry slopes • abrupt banks • Arrival in large plains • great extent of small water depth Flood propagation - UCL experiments

  8. The bump test case • CADAM test case by ULB/LRH Châtelet, March 1998 • Additional laboratory measurements at UCL using digital imaging, March 2001 • More experiments for IMPACT ? Flood propagation - UCL experiments

  9. The bump test case • Experimental set-up Reservoir h0 = 0.75 m Downstream h = 0.15 m Gate LRH Châtelet Flood propagation - UCL experiments

  10. The bump test case LRH Châtelet Flood propagation - UCL experiments

  11. The bump test case • Numerical result z (m) x (m) Flood propagation - UCL experiments

  12. The bump test case • Comparison with UCL measurements z (m) x (m) Flood propagation - UCL experiments

  13. Secondary dam UCL Flood propagation - UCL experiments

  14. Overview • Work plan within “Flood propagation” theme • Numerical modelling • Idealised dam-break flow experiments • In complex topographies • In urban area • Perspectives Flood propagation - UCL experiments

  15. Dam-break flow experiments • Urban areas • Kind of complex topography • Streets, buildings, houses • Complex flow route • Dam-break wave impact against buildings • Important velocities • Worsened rescue conditions Flood propagation - UCL experiments

  16. The building test case • Configuration 1 Flood propagation - UCL experiments

  17. The building test case • Configuration 2 Flood propagation - UCL experiments

  18. The building test case • Preliminary experiments : configuration 1 Flood propagation - UCL experiments

  19. The building test case • Preliminary experiments : configuration 1 Flood propagation - UCL experiments

  20. The building test case • Preliminary experiments : configuration 1 Flood propagation - UCL experiments

  21. The building test case • Preliminary experiments : configuration 1 Flood propagation - UCL experiments

  22. The building test case • Preliminary experiments : configuration 1 Flood propagation - UCL experiments

  23. The building test case • Foreseen measurements • Water-level • Surface-velocity by digital imaging • Pressure forces against building Flood propagation - UCL experiments

  24. The building test case • Configuration 1 - Numerical simulation Flood propagation - UCL experiments

  25. The building test case • Configuration 1 - Numerical simulation Flood propagation - UCL experiments

  26. The building test case • Configuration 1 - Numerical simulation Flood propagation - UCL experiments

  27. The building test case • Configuration 2 - Numerical simulation Flood propagation - UCL experiments

  28. The building test case • Configuration 2 - Numerical simulation Flood propagation - UCL experiments

  29. The building test case • Configuration 2 - Numerical simulation Flood propagation - UCL experiments

  30. Overview • Work plan within “Flood propagation” theme • Numerical modelling • Idealised dam-break flow experiments • In complex topographies • In urban area • Perspectives Flood propagation - UCL experiments

  31. Perspectives • Adverse slopes and local sills • New experiments • Improve source term treatment • Urban obstacles • Experiments with various configurations • Local influence • Influence on the far field Flood propagation - UCL experiments

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