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Convergence of estuarine channels

1. Introduction
2. Observed convergence length
3. Tidal asymmetry
4. Sediment transport
5. Sediment transport model
6. Equilibrium condition
7. Hydrodynamic model
8. High-water and low-water propagation speeds
9. Representative river discharge
10. Comparison with observed convergence lengths
11. Morphodynamic feedback
12. The overall sediment balance
13. Discussion
13.1. Uncertainties in the 1D bathymetric schematisation
13.2. Simplicity of the hydrodynamic model
13.3. Neglect of several potentially relevant hydrodynamic processes
13.4. Simplicity of the sediment transport model
13.5. Choice of the representative tide and « morphological » discharge
13.6. Equilibrium assumption for the estuarine morphology
13.7. The case of the Gironde estuary
13.8. The case of the Loire estuary
13.9. Engineering interventions
14. Summary and conclusions
Acknowledgements
Appendix A. Hydrodynamic model
Appendix B. Difference in ebb-flood duration
References