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Page Title:
Table 4. Summary of Example Pipeline Dredge Uncertainty Calculations |
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 ERDC TN-DOER-I5
August 2000
Table 4
Summary of Example Pipeline Dredge Uncertainty Calculations
Percent Uncertainty Contributed by Variable to Total
Total
ρm
ρw
ρi
ρs
V
D
Case
Uncertainty
Volumetric Flow Rate
1
--
2.38
3.43
0.04
0.05
0.001
5.90
2
--
5.03
20.12
0.01
0.01
0.0003
25.17
3
--
1.76
3.13
2.53
0.57
0.0009
7.99
4
--
4.92
19.67
0.97
0.18
0.0003
25.74
Solids Flow Rate
1
0.10
4.28
--
0.06
0.06
0.002
4.50
2
0.25
13.04
--
0.02
0.02
0.0005
13.33
3
0.07
2.75
--
0.65
0.65
0.001
7.03
4
0.23
12.09
--
0.32
0.32
0.0005
14.37
Case 1 - All instruments calibrated and sediment properties measured.
Case 2 - All instruments calibrated and sediment properties estimated.
Case 3 - Instruments out of calibration and sediment properties measured.
Case 4 - Instruments out of calibration and sediment properties estimated.
Table 5
Summary of Example Hopper Dredge Uncertainty Calculations
Percent Uncertainty Contributed by Variable to Total
Total
ρm
ρw
ρi
VOLh
Wh
Case
Uncertainty
Hopper In Situ Volume Content
1
--
1.44
2.07
2.56
3.68
9.76
2
--
4.80
19.21
0.95
1.37
26.33
3
--
0.36
0.51
15.83
22.79
39.49
4
--
2.72
10.90
13.45
19.37
46.44
Hopper Solids Content
1
0.05
2.15
--
2.78
4.00
8.98
2
0.22
11.26
--
1.62
2.33
15.43
3
0.01
0.49
--
15.90
22.90
39.30
4
0.08
4.21
--
15.15
21.81
41.25
Case 1 - All instruments calibrated and sediment properties measured.
Case 2 - All instruments calibrated and sediment properties estimated.
Case 3 - Instruments out of calibration and sediment properties measured.
Case 4 - Instruments out of calibration and sediment properties estimated.
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