Investigation of Dimension Changes in Under Pressure Hydraulic Sediment Flushing Cavity of Storage Dams Under Effect of Localized Vibrations in Sediment Layers

Dodaran, Asgar Ahadpour;Park, Sang-Kil;Mardashti, Asadollah;Noshadi, Masoud

  • Received : 2012.03.22
  • Accepted : 2012.05.25
  • Published : 2012.05.31


Several methods have been proposed to control the sedimentation process. These include catchment management, flushing, sluicing, density current venting, and dredging. Flushing is used to erode previously deposited sediments. In pressurized flushing, the sediment in the vicinity of the outlet openings is scoured and a funnel shaped crater is created. In this study, the effect of localized vibrations in the sediment layers on the dimensions of the flushing cone was investigated experimentally. For this purpose, experiments were carried out with two bottom outlet diameters, five discharge releases for each desired water depth, and one water depth above the center of the bottom outlets. The results indicate that the volume and dimensions of the flushing cone are strongly affected by localized vibrations.


Pressure Fushing;Local Scouring;Bottom Outlet;Sediment;Localized Vibrations


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