Centre documentaire

Modélisation hydrosédimentaire et formule de calcul de transport solide

DOC1 Morphological development of side channels
DOC2 A method for systematic assessment of the morphodynamic response to removal of bank protection
DOC3 Stability of river bifurcations in 1D morphodynamic models
DOC4 Intercomparaison des formules de transport solide – Programme Biparti 2001
DOC5 Sediment transport
DOC6 Bifurcation dynamics and avulsion duration in meandering rivers by one-dimensional and three-dimensional models

DOC1 Morphological development of side channels
1.Introduction
1.1. Background
1.2. Definition
1.3. Objectives
1.4. Main results
1.5. Structure of report
1.6. Acknowledgements
2. Present design rules
3. Morphological development
3.1. Introduction
3.2. Overbank flow conditions
3.3. In-bank flow conditions
4. Derivation of simplified expert rules
5. References
Appendices
A. One-dimensional analysis of river bifurcations
B. Simplified expert rules for morphological development of floodplains
C. Overview of CFR project reports

DOC2 A method for systematic assessment of the morphodynamic response to removal of bank protection
1. Introduction
2. Methodology
2.1. Difficulties in modelling morphodynamic response due to removal of bank protection
2.2. Approach to assess the impact of river bank measures on the riverbed
3. Application to river Ussel
3.1. Introduction
3.2. 1D morphodynamic analysis
3.3. Empirical relations
3.4. 2D numerical morphodynamic modelling
3.5. Optimization of the set of measures
4. Discussion
5. Conclusion
Acknowledgements
References

DOC3 Stability of river bifurcations in 1D morphodynamic models
Introduction
Nodal-point relations
Equilibrium states
Stability of the equilibrium states
Numerical verification
Conclusions
Acknowledgement
References

DOC4 Intercomparaison des formules de transport solide – Programme Biparti 2001
1. Introduction
2. Lois de frottement
2.1. Définitions liées à la contrainte de frottement
2.2. Courant seul
2.3. Houle seule
2.4. Interactions houle-courant
3. Mécanismes de transport solide
3.1. Critère d’entraînement
3.2. Mécanismes de transport
3.3. Effet de la houle
4. Formules de transport solide en courant permanent
4.1. Forme générale
4.2. Formules de transport par charriage
4.3. Formules de transport total
5. Effet de la houle sur le transport solide
5.1. Généralités
5.2. Formule de Buker
5.3. Formule de Bailard
5.4. Formule de Dibajnia et Watanabe
5.5. Formule de Soulsby-Van Rijn
6. Intercomparaison des formules
6.1. Méthodologie
6.2. Comparaison des formules (courant seul)
6.3. Intercomparaison des formules (houle et courants)
6.4. Conclusion des intercomparaisons
7. Conclusions
Références
Nomenclature
Annexe

DOC5 Sediment transport
Part 1: Bed load transport
– Introduction
– Characteristic parameters
– Motion of solitary bed-load particles for plane bed
– Calibration anc computational results
– Computation of saltation characteristics for various flow conditions
– Computation of bed-load concentration
– Computation of bed-load transport
– Verification
– Conclusions
– Acknowledgements
– Appendix 1: references
– Appendix 2: Notation
Part 2: Suspended load transport
– Introduction
– Characteristic parameters
– Initiation of suspension
– Mathematical description of concentration profiles
– Investigation of sediment diffusion coefficient
– Computation of suspended load
– Representative particle size of suspended sediment
– Ratio of suspended load and total load
– Verification
– Conclusions
– Acknowledgements
– Appendix 1: references
– Appendix 2: Notation
Part 3: Bed forms and alluvial roughness
– Introduction
– Characteristic parameters
– Bed-form classification
– Bed-form dimensions
– Equivalent roughness of bed forms
– Verificaton
– Prediction of flow depth
– Prediction of sediment transport
– Conclusions
– Acknowledgements
– Appendix 1: references
– Appendix 2: Notation

DOC6 Bifurcation dynamics and avulsion duration in meandering rivers by one-dimensional and three-dimensional models
1. Introduction
1.1. Review
1.2. Objectives and setup
2. Theory and hypotheses on sediment distribution at bifurcations
2.1. Nodal point concepts for one-dimensional models
2.2. Flow and sediment transport in meander bends
2.3. Hypothesized effect of bars and overdeepening on bifurcation dynamics
2.4. New nodal point relation for bifurcation with a bend upstream
2.5. Tested aspects and assumptions of nodal point concepts
3. Methodology and model description
3.1. One-dimensional model setup
3.2. Three-dimensional model setup
3.3. Bifurcation schematization and grid creation
3.4. Model scenarios and generality of the results
3.5. Sensitivity to grid size
4. Results
4.1. Morphodynamics at the bifurcation and effect of bend radius
4.2. Effects of a downstream gradient advantage
4.3. Effects of longer bifurcates
4.4. Effect of varying discharge
4.5. Effect of width-depth ratio of upstream bend length
5. Sensitivity analysis
5.1. Sensitivity to roughness, grain size and transport formulations
5.2. Sensitivity to bifurcation schematization
6. Test of nodal point concepts with three-dimensional model results
6.1. Division of flow discharge
6.2. Division of sediment transport
6.3. Comparison of one-dimensional and three-dimensional models
7. Discussion
7.1. Bar dynamics and limited predictability of bifurcation evolution by one-dimensional models
7.2. Applicability of nodal point relations
7.3. Implication for bifurcation stability and avulsion duration
7.4. Assessing effetcs of bed sediment sorting and channel-floodplain interactions
7.5 Implications for residual channels and anastomosing rivers
7.6. Future directions
8. Conclusions
Notation
References