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OCF Research Center Parshall Flumes Discharge Tables
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Discharge Tables

Minimum Head (ft) 0.05 Minimum Head (m) 0.0152
Minimum Flow Rate (cfs) 0.0033 Minimum Flow Rate (l/s) 0.0921
Maximum Head (ft) 0.70 Maximum Head (m) 0.2134
Maximum Flow Rate (cfs) 0.1945 Maximum Flow Rate (l/s) 5.507
Equation=cfs, ft 0.338*H1.55
Equation=l/s, m 60.36*H1.55
Download The Full Table Not suitable for use on unscreened sanitary flows

 

Sources: Water Measurement Manual, 3rd Edition, United States Department of the Interior, Bureau of Reclamation ASTM D 1941-91 (2007): Standard Test Method for Open Channel Flow Measurement of Water with Parshall Flume

Minimum Head (ft) 0.05 Minimum Head (m) 0.0152
Minimum Flow Rate (cfs) 0.0065 Minimum Flow Rate (l/s) 0.1843
Maximum Head (ft) 0.80 Maximum Head (m) 0.2438
Maximum Flow Rate (cfs) 0.4783 Maximum Flow Rate (l/s) 13.55
Equation=cfs, ft 0.676*H1.55
Equation=l/s, m 120.7*H1.55
Download The Full Table Not suitable for use on unscreened sanitary flows
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Minimum Flow Rate (cfs) 0.0280 Minimum Flow Rate (l/s) 0.7918
Maximum Head (ft) 1.50 Maximum Head (m) 0.4572
Maximum Flow Rate (cfs) 1.860 Maximum Flow Rate (l/s) 52.67
Equation=cfs, ft 0.992*H1.55
Equation=l/s, m 176.5*H1.55
Download The Full Table Minimum size recommended for sanitary flows
Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Minimum Flow Rate (cfs) 0.0542 Minimum Flow Rate (l/s) 1.534
Maximum Head (ft) 1.50 Maximum Head (m) 0.4572
Maximum Flow Rate (cfs) 3.909 Maximum Flow Rate (l/s) 110.7
Equation=cfs, ft 2.06*H1.58
Equation=l/s, m 381.2*H1.58
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Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Minimum Flow Rate (cfs) 0.0906 Minimum Flow Rate (l/s) 2.566
Maximum Head (ft) 2.00 Maximum Head (m) 0.6096
Maximum Flow Rate (cfs) 8.866 Maximum Flow Rate (l/s) 251.1
Equation=cfs, ft 3.07*H1.53
Equation=l/s, m 535.4*H1.53
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Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Minimum Flow Rate (cfs) 0.1202 Minimum Flow Rate (l/s) 3.405
Maximum Head (ft) 2.50 Maximum Head (m) 0.7620
Maximum Flow Rate (cfs) 16.13 Maximum Flow Rate (l/s) 456.9
Equation=cfs, ft 4*H1.522
Equation=l/s, m 690.9*H1.522
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Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Minimum Flow Rate (cfs) 0.1738 Minimum Flow Rate (l/s) 4.923
Maximum Head (ft) 2.50 Maximum Head (m) 0.7620
Maximum Flow Rate (cfs) 24.56 Maximum Flow Rate (l/s) 695.5
Equation=cfs, ft 6*H1.538
Equation=l/s, m 1056*H1.538
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Minimum Head (ft) 0.10 Minimum Head (m) 0.0305
Minimum Flow Rate (cfs) 0.4227 Minimum Flow Rate (l/s) 11.97
Maximum Head (ft) 2.50 Maximum Head (m) 0.7620
Maximum Flow Rate (cfs) 33.11 Maximum Flow Rate (l/s) 937.5
Equation=cfs, ft 8*H1.55
Equation=l/s, m 1,429*H1.55
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Minimum Head (ft) 0.15 Minimum Head (m) 0.0457
Minimum Flow Rate (cfs) 0.6151 Minimum Flow Rate (l/s) 17.42
Maximum Head (ft) 2.50 Maximum Head (m) 0.7620
Maximum Flow Rate (cfs) 50.39 Maximum Flow Rate (l/s) 1,427
Equation=cfs, ft 12*H1.566
Equation=l/s, m 2,184*H1.566
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Minimum Head (ft) 0.20 Minimum Head (m) 0.0610
Minimum Flow Rate (cfs) 1.262 Minimum Flow Rate (l/s) 35.75
Maximum Head (ft) 2.50 Maximum Head (m) 0.7620
Maximum Flow Rate (cfs) 67.93 Maximum Flow Rate (l/s) 1,924
Equation=cfs, ft 16*H1.578
Equation=l/s, m 2,954*H1.578
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Minimum Head (ft) 0.20 Minimum Head (m) 0.0610
Minimum Flow Rate (cfs) 1.555 Minimum Flow Rate (l/s) 44.04
Maximum Head (ft) 2.50 Maximum Head (m) 0.7620
Maximum Flow Rate (cfs) 80.53 Maximum Flow Rate (l/s) 2,425
Equation=cfs, ft 20*H1.587
Equation=l/s, m 3,732*H1.587
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Minimum Head (ft) 0.20 Minimum Head (m) 0.0610
Minimum Flow Rate (cfs) 2.630 Minimum Flow Rate (l/s) 74.48
Maximum Head (ft) 2.50 Maximum Head (m) 0.7620
Maximum Flow Rate (cfs) 103.5 Maximum Flow Rate (l/s) 2,931
Equation=cfs, ft 24*H1.595
Equation=l/s, m 4,521*H1.595
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Minimum Head (ft) 0.25 Minimum Head (m) 0.0610
Minimum Flow Rate (cfs) 3.043 Minimum Flow Rate (l/s) 86.17
Maximum Head (ft) 2.50 Maximum Head (m) 0.7620
Maximum Flow Rate (cfs) 121.4 Maximum Flow Rate (l/s) 3,438
Equation=cfs, ft 28*H1.601
Equation=l/s, m 5,318*H1.601
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Minimum Head (ft) 0.25 Minimum Head (m) 0.0762
Minimum Flow Rate (cfs) 3.449 Minimum Flow Rate (l/s) 97.66
Maximum Head (ft) 2.50 Maximum Head (m) 0.7620
Maximum Flow Rate (cfs) 139.5 Maximum Flow Rate (l/s) 3,951
Equation=cfs, ft 32*H1.607
Equation=l/s, m 6,115*H1.607
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Minimum Head (ft) 0.30 Minimum Head (m) 0.0914
Minimum Flow Rate (cfs) 5.737 Minimum Flow Rate (l/s) 162.5
Maximum Head (ft) 3.75 Maximum Head (m) 1.143
Maximum Flow Rate (cfs) 326.4 Maximum Flow Rate (l/s) 9,243
Equation=cfs, ft 39.38*H1.6
Equation=l/s, m 7,463*H1.6
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Minimum Head (ft) 0.33 Minimum Head (m) 0.1006
Minimum Flow Rate (cfs) 7.932 Minimum Flow Rate (l/s) 224.6
Maximum Head (ft) 4.50 Maximum Head (m) 1.3716
Maximum Flow Rate (cfs) 518.7 Maximum Flow Rate (l/s) 14,690
Equation=cfs, ft 46.75*H1.6
Equation=l/s, m 8,859*H1.6
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LOCATIONS IN ATLANTA, GA & BOISE, ID

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