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Discharge Tables

When using the discharge tables for the Cutthroat flumes it's important to remember that the tables are calculated to the top of the flume. This differs from the flow tables for most other flumes, where there is freeboard above the maximum head for the flume.

18-inch L X 1-inch W Cutthroat Flume
Minimum Head (ft) 0.05 Minimum Head (m) 0.0152
Miniumum Flow Rate (cfs) 0.0008 Minimum Flow Rate (l/s) 0.0223
Maximum Head (ft) 0.50 Maximum Head (m) 0.1524
Maximum Flow Rate (cfs) 0.1113 Maximum Flow Rate (l/s) 3.152
Equation=cfs, ft 0.494*H2.15
Equation=l/s, m 179.9*H2.15
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18-inch L x 2-inch W Cutthroat Flume
Minimum Head (ft) 0.05 Minimum Head (m) 0.0152
Miniumum Flow Rate (cfs) 0.0015 Minimum Flow Rate (l/s) 0.0428
Maximum Head (ft) 0.50 Maximum Head (m) 0.1524
Maximum Flow Rate (cfs) 0.2134 Maximum Flow Rate (l/s) 6.043
Equation=cfs, ft 0.947*H2.15
Equation=l/s, m 344.8*H2.15
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18-inch L x 4-inch W Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.0140 Minimum Flow Rate (l/s) 0.3960
Maximum Head (ft) 0.50 Maximum Head (m) 0.1524
Maximum Flow Rate (cfs) 0.445 Maximum Flow Rate (l/s) 12.60
Equation=cfs, ft 1.975*H2.15
Equation=l/s, m 719.2*H2.15
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18-inch L x 8-inch W Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.0285 Minimum Flow Rate (l/s) 0.8080
Maximum Head (ft) 0.50 Maximum Head (m) 0.1524
Maximum Flow Rate (cfs) 0.908 Maximum Flow Rate (l/s) 25.71
Equation=cfs, ft 4.030*H2.15
Equation=l/s, m 1467*H2.15
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36-inch L x 2-inch W Cutthroat Flume
Minimum Head (ft) 0.05 Minimum Head (m) 0.0152
Miniumum Flow Rate (cfs) 0.0029 Minimum Flow Rate (l/s) 0.0822
Maximum Head (ft) 1.00 Maximum Head (m) 0.3048
Maximum Flow Rate (cfs) 0.7190 Maximum Flow Rate (l/s) 20.36
Equation=cfs, ft 0.719*H1.84
Equation=l/s, m 181.2*H1.84
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36-inch L x 4-inch W Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.0211 Minimum Flow Rate (l/s) 0.5972
Maximum Head (ft) 1.00 Maximum Head (m) 0.3048
Maximum Flow Rate (cfs) 1.459 Maximum Flow Rate (l/s) 41.32
Equation=cfs, ft 1.459*H1.84
Equation=l/s, m 367.6*H1.84
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36-inch W x 8-inch L Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.0429 Minimum Flow Rate (l/s) 1.216
Maximum Head (ft) 1.00 Maximum Head (m) 0.3048
Maximum Flow Rate (cfs) 2.970 Maximum Flow Rate (l/s) 84.11
Equation=cfs, ft 2.970*H1.84
Equation=l/s, m 748.3*H1.84
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36-inch W x 16-inch L Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.0873 Minimum Flow Rate (l/s) 2.472
Maximum Head (ft) 1.00 Maximum Head (m) 0.3048
Maximum Flow Rate (cfs) 6.040 Maximum Flow Rate (l/s) 171.1
Equation=cfs, ft 6.040*H1.84
Equation=l/s, m 1522*H1.84
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54-inch W x 3-inch L Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.0183 Minimum Flow Rate (l/s) 0.5180
Maximum Head (ft) 1.50 Maximum Head (m) 0.4572
Maximum Flow Rate (cfs) 1.928 Maximum Flow Rate (l/s) 54.61
Equation=cfs, ft 0.96*H1.72
Equation=l/s, m 209.7*H1.72
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54-inch W x 6-inch L Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.0373 Minimum Flow Rate (l/s) 1.058
Maximum Head (ft) 1.50 Maximum Head (m) 0.4572
Maximum Flow Rate (cfs) 3.9374 Maximum Flow Rate (l/s) 111.5
Equation=cfs, ft 1.96*H1.72
Equation=l/s, m 428.2*H1.72
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54-inch W x 12-inch L Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.0758 Minimum Flow Rate (l/s) 2.148
Maximum Head (ft) 1.50 Maximum Head (m) 0.4572
Maximum Flow Rate (cfs) 7.994 Maximum Flow Rate (l/s) 226.4
Equation=cfs, ft 3.980*H1.72
Equation=l/s, m 869.5*H1.72
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54-inch W x 24-inch L Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.1526 Minimum Flow Rate (l/s) 4.322
Maximum Head (ft) 1.50 Maximum Head (m) 0.4572
Maximum Flow Rate (cfs) 16.09 Maximum Flow Rate (l/s) 455.6
Equation=cfs, ft 8.01*H1.72
Equation=l/s, m 1,750*H1.72
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108-inch L x 12-inch W Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.0964 Minimum Flow Rate (l/s) 2.730
Maximum Head (ft) 3.00 Maximum Head (m) 0.9144
Maximum Flow Rate (cfs) 19.43 Maximum Flow Rate (l/s) 550.1
Equation=cfs, ft 3.50*H1.56
Equation=l/s, m 632.3*H1.56
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108-inch L x 24-inch W Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.1958 Minimum Flow Rate (l/s) 5.546
Maximum Head (ft) 3.00 Maximum Head (m) 0.9144
Maximum Flow Rate (cfs) 39.46 Maximum Flow Rate (l/s) 1,118
Equation=cfs, ft 7.11*H1.56
Equation=l/s, m 1,284*H1.56
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108-inch L x 48-inch W Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.3991 Minimum Flow Rate (l/s) 11.30
Maximum Head (ft) 3.00 Maximum Head (m) 0.9144
Maximum Flow Rate (cfs) 80.42 Maximum Flow Rate (l/s) 2,278
Equation=cfs, ft 14.49*H1.56
Equation=l/s, m 2,618*H1.56
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108-inch L x 72-inch W Cutthroat Flume
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Miniumum Flow Rate (cfs) 0.6059 Minimum Flow Rate (l/s) 17.16
Maximum Head (ft) 3.00 Maximum Head (m) 0.9144
Maximum Flow Rate (cfs) 122.1 Maximum Flow Rate (l/s) 3,458
Equation=cfs, ft 22.0*H1.56
Equation=l/s, m 3,974*H1.56
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