curriculum in natural environmental science, vol. 2, 2010
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Swiss examples of the impacts of dams on natural environments and management strategies of sediment control Jean-Luc Loizeau, Stéphanie Jüstrich and Walter Wildi Institut F.-A. Forel , University of Geneva, Switzerland. curriculum in natural environmental science, vol. 2, 2010. - PowerPoint PPT PresentationTRANSCRIPT
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curriculum in natural environmental science, vol. 2, 2010NEAR
Swiss examples of the impacts of dams on natural environments and management
strategies of sediment control
Jean-Luc Loizeau, Stéphanie Jüstrich and Walter Wildi
Institut F.-A. Forel, University of Geneva, Switzerland
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Geneva
Bern
Zurich
Dams in Switzerland
Verbois dam
Wettingen dam
Dams in the Rhone River watershed
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Evolution of the reservoir cumulated capacity in the Rhone watershed
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Verbois dam and reservoir
Photo: J.-L. Loizeau
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Rhone River and Arve River confluence in Geneva
Photo: J.-L. Loizeau
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Verbois reservoir sediment flushing in 2000
Photo: J.-L. Loizeau
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Verbois reservoir sediment flushing in 2000
Photo: J.-L. Loizeau
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Verbois reservoir sediment flushing in 2000
Photo: J.-L. Loizeau
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Verbois reservoir flushing
Year
1940 1950 1960 1970 1980 1990 2000
Se
dim
ent v
olu
me
(Mm
3 )
0
500
1000
1500
2000
2500
3000
Flu
shin
g ef
ficie
ncy
(%
)
40
60
80
100
120
140
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Photo: S. Jüstrich
Wetttingen dam and reservoir
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Wetttingen dam and reservoir
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Point bar Main channel
Exposed contaminated sediments
Contaminated sediment layer
0 50 100 150 200 m
365
370
375
380
Ele
vatio
n (m
asl
)
1958-1975
1975-20031932-1958
Wetttingen dam and reservoir