1. Rupro, breach model used by Cemagref during Impact project
André PAQUIER

2. Aims of the model
To provide a maximum possible discharge hydrograph for dam-break wave propagation models
Simple but with description of erosion process
Overtopping or piping
To be integrated in general hydrodynamic model as evolving structure

3. Description of Rupro Simplified longitudinal profile

4. Description of Rupro One cross section with evolving shape
Piping
Overtopping

5. Description of Rupro Solving coupled equations par Runge Kutta
Bernoulli equation
Meyer-Peter and Muller relation

6. Conclusions Validated for peak discharge
Validated against physical model (Cadam)
To be improved during Impact project
Heterogeneous material
Shape of breach, more cross sections
For Impact project, sediment transport models 1D, 2D developed by Cemagref may also be used