Author(s): Jolanda M. I. Jenzer Althaus; Giovanni De Cesare; Anton J. Schleiss
Linked Author(s): Anton J. Schleiss
Keywords: No Keywords
Abstract: In the framework of the reservoir sedimentation problematic, a new innovation employing water jets in order to maintain the fine sediments in suspension and to release them through the water intake is studied. Laboratory experiments are performed in a cuboidal basin, in which four equal water jets create a cyclonic circulation. Light weight crushed walnut shells are used as sediments. Turbidity measurements give information about the time evolution of the sediment concentration at strategically interesting locations. Flow velocities and patterns are measured by ultrasound velocity profiler technique (UVP). It could be observed that the experimental installation is very well suited to study the flow pattern produced by the studied jet configurations and to compare the evacuated sediment amount through the water intake. A sensitivity analysis regarding the momentum flux, the jet Froude number and the position of the jet cyclone has been performed in order to evaluate which jet configuration gives the optimal combination regarding the suspended sediment release.
Year: 2009