Hydrology-Hydraulics Research Unit, Lyon, France 1

Sediment transport models used by Cemagref

during Impact projectAndré PAQUIER

Hydrology-Hydraulics Research Unit, Lyon, France 2

Aims of the models Rubarbe:1-D model: bed-load by sediment

discharge limited by transport capacity, evolution of main bed geometry during floods

Rubar20TS: 2-D model: suspended load by concentration, exchanges with bottom controlled by equilibrium concentration, evolution of flood plain deposits during floods

Hydrology-Hydraulics Research Unit, Lyon, France 3

1-D model RUBARBE

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Hydrology-Hydraulics Research Unit, Lyon, France 4

Example of use of MPM

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0 10 20 30 40 50Y (m)

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Initial section Calculated stable section (m=1)DIPLAS stable section

Hydrology-Hydraulics Research Unit, Lyon, France 5

2-D model RUBAR20TS

 

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Hydrology-Hydraulics Research Unit, Lyon, France 6

Ptuj Lake

Hydrology-Hydraulics Research Unit, Lyon, France 7

Conclusions 1-D model « validated » for usual floods in

rivers and for some specific cases (flushing gate)

2-D model « validated » for deposits in reservoirs

Complementary models, » both relatively simple but including (very) unsteady

flow Use possible for breaching, near field, far

field?