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  4. Fine Sediment release from a reservoir by controlled hydrodynamic mixing
 
conference paper

Fine Sediment release from a reservoir by controlled hydrodynamic mixing

Althaus, Jenzer  
•
Isabella, Jolanda Maria  
•
De Cesare, Giovanni  
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2011
Proceedings of the 34th IAHR World Congress
34th IAHR World Congress

Reservoir sedimentation is worldwide a problem and requires a sustainable solution. The idea of maintaining sediment in suspension by a jet induced artificial turbulence and releasing it through the water intake was tested in laboratory experiments. Therefore, two jet configurations and the influence of their geometrical parameters and the jet discharge on the sediment release were investigated: (i) a circular jet configuration with four jets arranged in a circle on a horizontal plane and (ii) a linear jet configuration with four jets arranged on a line parallel to the front wall. Turbidity measurements accompanied by flow velocity measurements give information about the efficiency and its reasons. The circular jet arrangement was more efficient than the linear arrangement and reached with the highest tested discharge (ΣQj = 4050 l/h) an evacuated sediment ratio of 0.73. An optimal parameter set was identified having a release efficiency of between 1.5 and 2 compared to no jets, depending on time and discharge. The optimal jet configuration indicates best installation and discharge practice of the jets when fighting against reservoir sedimentation. A pilot prototype set-up underlines the experimentally found promising results

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Type
conference paper
Author(s)
Althaus, Jenzer  
Isabella, Jolanda Maria  
De Cesare, Giovanni  
Schleiss, Anton  
Date Issued

2011

Published in
Proceedings of the 34th IAHR World Congress
ISBN of the book

978-0-85825-868-6

Volume

CD-ROM

Start page

1763

End page

1770

Subjects

reservoir sedimentation

•

physical experiments

•

water jets

•

jet mixing

•

sediment release

Note

[793]

Editorial or Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
PL-LCH  
Event nameEvent placeEvent date
34th IAHR World Congress

Brisbane, Australia

June 26 - July 1st, 2011

Available on Infoscience
August 31, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/70591
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