Large 60-Degree-V Trapezoidal Flume Discharge Table
80% Submergence Transition
Formulas (H in feet):
Formulas (H in meters):
FEET
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0.15
0.16
0.17
0.18
0.19
0.20
0.21
0.22
0.23
0.24
0.25
0.26
0.27
0.28
0.29
0.30
Source:
INCHES METERS
0.12
0.24
0.36
0.48
0.60
0.72
0.84
0.96
1.08
1.20
1.32
1.44
1.56
1.68
1.80
1.92
2.04
2.16
2.28
2.40
2.52
2.64
2.76
2.88
3.00
3.12
3.24
3.36
3.48
3.60
0.0030
0.0061
0.0091
0.0122
0.0152
0.0183
0.0213
0.0244
0.0274
0.0305
0.0335
0.0366
0.0396
0.0427
0.0457
0.0488
0.0518
0.0549
0.0579
0.0610
0.0640
0.0671
0.0701
0.0732
0.0762
0.0792
0.0823
0.0853
0.0884
0.0914
2.58
CFS = 1.55 Hft.
L/S = 941.2 Hm 2.58
CFS
GPM
2.58
GPM = 695.6 Hft.
M3/HR = 3388 Hm 2.58
MGD
L/S
±2-5% Accuracy
MGD = 1.002 Hft. 2.58
M3/HR
Excessive error due to fluid-flow properties and boundary conditions
0.0116
0.0137
0.0160
0.0186
0.0214
0.0244
0.0276
0.0312
0.0350
0.0390
0.0434
0.0480
0.0529
0.0581
0.0636
0.0694
5.208
6.152
7.194
8.337
9.584
10.94
12.41
13.99
15.69
17.51
19.46
21.53
23.73
26.06
28.53
31.14
0.0075
0.0089
0.0104
0.0120
0.0138
0.0158
0.0179
0.0201
0.0226
0.0252
0.0280
0.0310
0.0342
0.0375
0.0411
0.0448
0.3287
0.3882
0.4539
0.5261
0.6048
0.6904
0.7830
0.8828
0.9901
1.105
1.228
1.358
1.497
1.645
1.801
1.965
1.183
1.397
1.633
1.893
2.176
2.484
2.817
3.177
3.563
3.976
4.418
4.888
5.39
5.92
6.48
7.07
Trapezoidal Flumes for Open-Channel Flow Measurement, Transactions of the American Society of Agricultural Engineers, Vol. 3, No. 2, 1960
Measuring Water in Small Channels with WSC Flume, Washington Agricultural Experiment Station, Circular 200, 1952
Large 60-Degree-V Trapezoidal Flume Discharge Table
80% Submergence Transition
Formulas (H in feet):
Formulas (H in meters):
FEET
0.31
0.32
0.33
0.34
0.35
0.36
0.37
0.38
0.39
0.40
0.41
0.42
0.43
0.44
0.45
0.46
0.47
0.48
0.49
0.50
Source:
INCHES METERS
3.72
3.84
3.96
4.08
4.20
4.32
4.44
4.56
4.68
4.80
4.92
5.04
5.16
5.28
5.40
5.52
5.64
5.76
5.88
6.00
0.0945
0.0975
0.1006
0.1036
0.1067
0.1097
0.1128
0.1158
0.1189
0.1219
0.1250
0.1280
0.1311
0.1341
0.1372
0.1402
0.1433
0.1463
0.1494
0.1524
2.58
CFS = 1.55 Hft.
L/S = 941.2 Hm 2.58
2.58
GPM = 695.6 Hft.
M3/HR = 3388 Hm 2.58
±2-5% Accuracy
MGD = 1.002 Hft. 2.58
CFS
GPM
MGD
L/S
M3/HR
0.1139
0.1224
0.1314
0.1407
0.1505
0.1607
0.1713
0.1823
0.1938
0.205
0.1554
0.1653
0.1757
0.1864
0.1975
0.2090
0.2210
0.2333
0.2461
0.2592
51.12
54.93
58.97
63.15
67.54
72.12
76.88
81.82
86.98
92.00
69.72
74.19
78.84
83.66
88.65
93.82
99.17
104.7
110.4
116.3
0.0736
0.0791
0.0849
0.0909
0.0973
0.1039
0.1107
0.1178
0.1253
0.1325
0.1004
0.1068
0.1135
0.1205
0.1277
0.1351
0.1428
0.1508
0.1590
0.1675
3.226
3.466
3.721
3.985
4.262
4.551
4.851
5.163
5.488
5.806
4.400
4.682
4.975
5.279
5.594
5.920
6.258
6.607
6.968
7.341
11.61
12.47
13.39
14.34
15.34
16.38
17.46
18.58
19.75
20.89
15.83
16.85
17.90
18.99
20.13
21.30
22.52
23.77
25.07
26.41
Trapezoidal Flumes for Open-Channel Flow Measurement, Transactions of the American Society of Agricultural Engineers, Vol. 3, No. 2, 1960
Measuring Water in Small Channels with WSC Flume, Washington Agricultural Experiment Station, Circular 200, 1952