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Introduction
to predict if some erosion is to be expected in the straight inlet and outlet reach and if any sediment
transport can be observed or not (breakup of the armoring layer).
hw Qb [g/min]
[m] So = 0.2% So = 0.3% So = 0.35% So = 0.4% So = 0.45% So = 0.5% So = 0.55% So = 0.6% So = 0.65% So = 0.7% So = 0.8% So = 0.9%
0.10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 232
0.11 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 933
0.12 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 876 5 893
0.13 - - - - - - - - - - - - - - - - - - - - - - - - - - - 451 4 255 9 092 Q=150
0.14 - - - - - - - - - - - - - - - - - - - - - - - - 432 2 273 6 812 12 511
0.15 - - - - - - - - - - - - - - - - - - - - - 184 2 048 4 225 9 534 16 135
0.16 - - - - - - - - - - - - - - - - - - - - - 1 588 3 770 6 298 12 410 19 949 Q=210
0.17 - - - - - - - - - - - - - - - - - - 942 3 078 5 591 8 484 15 429 23 941
0.18 - - - - - - - - - - - - - - - 165 2 204 4 649 7 504 10 776 18 583 28 099
0.19 - - - - - - - - - - - - - - - 1 207 3 530 6 294 9 505 13 167 21 862 32 414
0.20 - - - - - - - - - - - - 155 2 301 4 917 8 011 11 587 15 650 25 261 36 876 Fr > 1.0
0.21 - - - - - - - - - - - - 1 031 3 443 6 362 9 794 13 745 18 222 28 770 41 476
0.22 - - - - - - - - - - - - 1 945 4 631 7 860 11 639 15 976 20 876 32 385 46 207
0.23 - - - - - - - - - 500 2 895 5 861 9 409 13 544 18 275 23 608 36 100 51 062
0.24 - - - - - - - - - 1 235 3 879 7 133 11 006 15 506 20 639 26 414 39 909 56 033
0.25 - - - - - - - - - 1 995 4 895 8 443 12 648 17 520 23 065 29 290 43 807 61 116
no sediment transport sediment transport Fr > 0.8 Fr > 0.9
Test
Main tests
Table 5.2: Computed sediment transport capacity (with armoring) - overview over the test domain
Q b , Fr and h w
Table 5.3 gives an overview of the performed tests and measurements. During the preliminary
tests, velocities were measured at some positions which allowed to define the velocity range for
the measurement device of the main tests. Appendix 1 contains detailed tables of all test parameters.
Prelim.
Additional
Table 5.3:
ID
A1
A2
B1
B2
B3
B4
C1
C2
C3
C4
D1
D2
D3
D4
E2
E3
E5
J 0
e s e d
[%] [°] [mm]
0.50
0.50
0.50
0.50
0.50
0.50
0.70
0.70
0.70
0.70
0.35
0.35
0.35
0.35
0.50
0.50
0.50
---
2°
---
4°
2°
1°
---
4°
2°
1°
---
4°
2°
1°
4°
2°
8°
---
20
---
20
20
20
---
20
20
20
---
20
20
20
40
40
40
Q
[l/s]
20...210
170...210
70...210
70...210
70...210
70...210
70...210
70...210
70...210
70...210
70...210
70...210
70...210
70...210
70...210
70...210
70...210
MEASUREMENTS
Waterlevel Bedlevel Velocity Grain size
Overview of the performed tests and measurements
* some sample velocities were taken with a micro-propeller to confirm the estimated velocities
*
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EPFL Ph.D thesis 2632 - Daniel S. Hersberger November 9, 2002 / page 101