Author(s): G. Harb; S. Haun; S. Ortner; C. Dorfmann; J. Schneider
Linked Author(s):
Keywords: Reservoir sedimentation; Secondary currents; River flow; Numerical studies; Field measurements
Abstract: In the current paper the sedimentation problems in a reservoir of a run-of-river power plant will be discussed. The hydropower plant is located at the river Enns in Austria. The reservoir is affected by massive deposits of suspended sediment load near the turbines, which are located at the inner site of the river bend. In case of floods, the secondary currents in the river bend further increase the transport of suspended load to the turbine inlets. To reduce the sedimentation, to facilitate transportation of suspended load and to activate the transportation of the deposited sediments an operation method called “soft flushing” has to be carried out. In a three-dimensional numerical model the sedimentation processes and the secondary currents were investigated. The results were compared to ADCP field measurements and supplemental measurements in the physical model of the reservoir.
Year: 2011