Contribution a la modélisation de l'onde de rupture d'un barrage envase.

Abstract

Propagation simulation of the dambreak wave constitutes a significant factor in the dam break risks study under seism effect. For a precise analysis of the phenomenon, we must hold account the effect of the mud contained in the reserve which can, during the failure, being mobilized quasi instantaneously and transported towards the downstream of the dam. In this study, a numerical modelling of dambreak wave of silted dam is carried out. The model treats, in the upstream of the dam, the flow and the erosion of sediments contained in reserve. In the downstream, it treats the wave propagation and the transport of the sediments in the valley. The results of simulation are exploited to work out the cartography of vulnerable zones to the flood, and sediment zones of the mud transported.

Propagation simulation of the dambreak wave constitutes a significant factor in the dam break risks study under seism effect. For a precise analysis of the phenomenon, we must hold account the effect of the mud contained in the reserve which can, during the failure, being mobilized quasi instantaneously and transported towards the downstream of the dam. In this study, a numerical modelling of dambreak wave of silted dam is carried out. The model treats, in the upstream of the dam, the flow and the erosion of sediments contained in reserve. In the downstream, it treats the wave propagation and the transport of the sediments in the valley. The results of simulation are exploited to work out the cartography of vulnerable zones to the flood, and sediment zones of the mud transported.