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ตารางท 4.2 Discharge for weir notches in check dams
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Compute by formula Q = 3.39L(H )
Where Q = discharge in cfs
L = length of weir notch in ft
H = depth of weir noth in ft
H
L 1 2 3 4 5 6 7 8
0.5 1.2 2.4 3.6 4.8 6.0 7.2 8.4 9.6
1.0 3.4 6.8 10.2 13.6 17.0 20.3 23.7 27.1
1.5 6.2 12.5 18.7 24.9 31.1 37.4 43.6 49.8
2.0 9.6 19.2 28.8 38.3 47.9 57.5 67.1 76.7
2.5 13.4 26.8 40.2 53.6 67.0 80.4 93.8 107.2
3.0 17.6 35.2 52.8 70.5 88.1 105.7 123.3 140.9
3.5 22.2 44.4 66.6 88.8 111.0 133.2 155.4 177.6
4.0 27.1 54.2 81.4 108.5 135.6 162.7 189.8 217.0
4.5 32.4 64.7 97.1 129.4 161.8 194.2 226.5 258.9
5.0 37.9 75.8 113.7 151.6 189.5 227.4 265.3 303.2
L 9 10 11 12 13 14 15 16
0.5 10.8 12.0 13.2 14.4 15.6 16.8 18.0 19.2
1.0 30.5 33.9 37.3 40.7 44.1 47.5 50.9 54.3
1.5 56.0 62.3 68.5 74.7 81.0 87.2 93.4 99.6
2.0 86.3 95.9 105.5 115.0 124.6 134.2 143.8 153.4
2.5 120.6 134.0 147.4 160.8 174.2 187.6 201.0 214.4
3.0 158.5 176.1 193.8 211.4 229.0 246.6 264.2 281.8
3.5 199.8 222.0 244.2 266.4 288.6 310.8 333.0 355.2
4.0 244.1 271.2 298.3 325.4 352.6 379.7 406.8 433.9
4.5 291.2 323.6 356.0 388.3 420.7 453.1 485.4 517.8
5.0 341.1 379.0 416.9 454.8 492.7 530.6 568.5 606.4
