1. Flood propagation Simulation of the IMPACT case study on the Tous dam-break flow Université catholique de Louvain Sandra Soares Frazão and Yves Zech

2. Tous test case - UCL computations2 Overview Interpreting of real data into comp. data –Representation of buildings –Upstream boundary condition –Downstream boundary condition Runs performed at UCL Analysis of the results –Water level –Discharge –Inundated area Conclusions

3. Tous test case - UCL computations3 The Jùcar river and Sumacárcel Tous dam Sumacárcel

4. Tous test case - UCL computations4 Sumacárcel Located on a hill near the Júcar

5. Tous test case - UCL computations5 Outflow hydrograph

6. Tous test case - UCL computations6 Preliminary run Localisation of inundated area in town Buildings reached by the flood -> included in the mesh Buildings not reached by the flood -> not included in the mesh First run with coarse mesh

7. Tous test case - UCL computations7 Meshing of the town Coarse mesh without buildings Refined mesh with buildings

8. Tous test case - UCL computations8 Upstream boundary condition Location in the computational data 1982 bathymetry 1998 bathymetry Dam Inflow section Dam Inflow section

9. Tous test case - UCL computations9 Downstream boundary condition 1998 bathymetry : OK 1982 bathymery : deep hole added to mesh

10. Tous test case - UCL computations10 Runs performed ~4 days / run on Pentium IV processor CFL max 0.9

11. Tous test case - UCL computations11 Analysis of the results Water level Discharge Inundated area

12. Tous test case - UCL computations12 Water level Qualitative comparison at gauge n°10

13. Tous test case - UCL computations13 Water level Gauge n°1

14. Tous test case - UCL computations14 Water level Gauge n°4

15. Tous test case - UCL computations15 Water level Gauge n°16

16. Tous test case - UCL computations16 Difference between bathymetry

17. Tous test case - UCL computations17 Difference between bathymetry Deeper river bed in 1998 bathymetry

18. Tous test case - UCL computations18 Discharge

19. Tous test case - UCL computations19 Discharge

20. Tous test case - UCL computations20 Inundated area In the town

21. Tous test case - UCL computations21 Inundated area normal mid upper

22. Tous test case - UCL computations22 Inundated area Smaller extent for upper hydrograph than for normal: V2 > V1

23. Tous test case - UCL computations23 Conclusions Main difficulties –Handle the huge size of data –Mixed scales –Boundary conditions –Steep slopes: topographical source terms Encouraging results

24. Thank you for your attention! Sandra Soares Frazão and Yves Zech