1. 4th IMPACT Workshop, Zaragoza, Spain, 3-5th November 2004
Photomosaic: G.R. Brooks/B. Spinewine
Geomorphic routing of the Lake Ha! Ha! breakout flood, Québec, by streamwise diffusion-advection
H. Capart & D.L. Young National Taiwan University

2. Governing equations in 1D
Diffusion Entrainment

3. Pure diffusion: conservative
Diffusion-advection: net entrainment

4. Diffusion-advection: 1D behaviour

5. Diffusion-advection: 1D behaviour

6. Governing equations in 2D
Diffusion Entrainment

7. Streamwise diffusion tensor and slope
s = (sx ,sy) = streamwise direction n = (nx ,ny) = normal direction

8. 2D diffusion: isotropic vs. anisotropic

9. Results for different scales

10. Dyke near-field
Photo: G. Brooks,
Geol. Survey Canada

11. Before/after
Photos: Photocartothèque québecoise

12. Simulation results

13. Orthophoto
Measured change
Computed change

14. Orthophoto
Measured change
Computed change

15. Long profile: full valley

16. Long profile: upstream valley

17. Long profile: downstream valley