1. 1 Tasks 4.1 4.2 CUDAM - Department of Civil and Environmental Engineering University of Trento Louvain-la-Neuve, Nov 5 th -7 th 2003 IMPACT Investigation of Extreme Flood Processes & Uncertainty Composition of the group: a.armanini c.dalrì r.fabrizi m.giuliani l.fraccarollo m.larcher g.rosatti

2. 2 Experimental installation Conveyer belt High slope tilting channel

3. 3 Flow regimes immaturemature plugrigid bed

4. 4 Collisional regime Added mass (Lamb, 1932)

5. 5 Bagnold (1954)

6. 6 Mechanical energy balance

7. 7 Bimodal material: quasi-uniform conditions and adaptation

8. 8 Erosional Dam Break

9. 9 Theoretical and physical Solutions Erosional Dam Break Fraccarollo L., Capart, H., "Riemann wave description of erosional dam-break flows", Journal of Fluid Mechanics, 461, 183-228, 2002. Fraccarollo L., Capart, H. and Zech, Y., "A Godunov method for the computation of erosional shallow water transient", Int. Journal of Numerical Methods in Fluids, 41:951-976, 2003.

10. 10 Experimental assessment of the self-similarity

11. 11 Use of finer sedimentTwo-dimensional effects near to the front

12. 12 Dam-break with different initial conditions

13. 13 Comparison analytical-physical solutions

14. 14 Measurements of the variable profiles

15. 15 Immature debris flow:

16. 16 Mass entrainment and transport phenomena

17. 17 Tasks 4.1 4.2 CUDAM - Department of Civil and Environmental Engineering University of Trento Louvain-la-Neuve, Nov 5 th -7 th 2003 IMPACT Investigation of Extreme Flood Processes & Uncertainty Composition of the group: a.armanini c.dalrì r.fabrizi m.giuliani l.fraccarollo m.larcher g.rosatti