pdf, 12 MiB - Infoscience - EPFL

Analysis of the evolution of the scour
Distance to reference level [mm]
Distance to reference level [mm]
1100
1000
900
800
Distance to reference level [mm]
Distance to reference level [mm]
1300
1200
0.8
1.3
1.8
2.3
1100
2.8
3.3
3.8
4.3
1000
4.8
5.3
5.8
6.3
6.8
900
7.3
7.8
8.3
8.8
10.8
800
13.3
14.8
0.8
Evolution of the water and bed levels on the
1.3
700
18 outer side wall
Second scour
First scour
1000
600
0.0 m 5.0 m 10.0 m 15.0 m 20.0 m 25.0 m
Distance from the begining of the channel [m] 900
700
10 m 11 m 12 m 13 m
Distance from the begining of the channel [m]
1100
1000
900
800
700
1300
1200
1100
1000
900
800
700
First scour
Evolution of the water and bed levels on the outer side wall
600
900
0.0 m 5.0 m 10.0 m 15.0 m 20.0 m 25.0 m
Distance from the begining of the channel [m]
800
600
10 m 11 m 12 m 13 m
Distance from the begining of the channel [m]
Duration of
the scour
process [h]
600
16 m 17 m 18 m 19 m
Distance from the begining of the channel [m]
Duration of
the scour
process [h]
0.5
1
1.5
2
2.5
3
3.5
4.5
5
5.5
6
6.5
7
12
15
05
Figure 6.16: Evolution of the water and bed levels along the outer side wall for tests with macro-roughness, spaced
every 2° - S 0 = 0.70%, Q = 150 (on top) and 180 l/s (bottom)
Distance to reference level [mm]
the arrows are showing the
time evolution
800
700
Evolution of the water and bed levels on the outer side w
Second scour
Distance to reference level [mm]
1000
700
time evolution
time evolution
600
16 m 17 m 18 m 19 m
EPFL Ph.D thesis 2632 - Daniel S. Hersberger November 9, 2002 / page 131