Question: Water flows under gravity in a partially filled pipe that is 25 cm in diameter. Determine the flow rate of water in m 3 /s
Water flows under gravity in a partially filled pipe that is 25 cm in diameter.
Determine the flow rate of water in m3/s in the pipe when the depth of water is 20 cm.
Assume the slope of the pipe is 4.0 %.
Report answer to 3 decimal places.
This questions is worth 4 marks.
1.0 0.9 0.8 0.7 0.6 Ratio dID 0.5 Discharge curve 0.4 0.3 Velocity curve v 0.2 0.1 O 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 Ratio q/Q or v/V Manning Formula Pipe Flow Chart American/SI units 0.00003 +0.003 -0.600 0.8+ 0.25 10,000 9.000 8.000 7,000 72 66 60 54 0.00004 0.004 0.500 180 170 160 150 140 130 120 0.9 0.00005 +0.005 0.00006 +0.006 0.00007 +0.007 0.00008 +0.008 0.00010 F0.010 0.400 6,000 10-03 48 1.1 5.000 0.300 42-5110 100 12 4,000 36 - 0.00015 +0.015 0.00020 +-0.020 90 1.3 0.4 80 0.200 1.4 + 3,000 30 0.0003 +0.03 - 70 1.5 -0.04 0.150 24 60 1.6 = 1.7 0.5 0.0004 0.0005 +0.05 0.0006 +0.06 0.0007 +0.07 0.0008 +0.08 0.0010 +0.10 2.000 1.8L 2050 1.9 19 2.0-0.6 1,500 0.100 0.090 0.080 1640 0.0015 +0.15 0.0020 +0.20 0.7 14 0.070 - 0.003+0.3 0.060 1230 0.8 1,000 900 800 700 0.050 Flow, gpm Flow, m3/s Pipe diameter, in. Pipe diameter, cm Slope, ft/ft or m/m 10 Slope, % 0.004 0.4 0.005 0.5 0.006 0.6 0.007 +0.7 0.008 0.8 0.010 1.0 Velocity, ft/s Velocity, m/s 0.9 3 600 -0.040 1.0 +++ 8 20 500 1.1 0.030 7 - 0.015 +1.5 1.2 400 4. 6 0.020 + 2.0 15 1 1.3 300 0.020 0.03- 3.0 1.4 5 5 1.5 TTT TT 0.015 4 -10 0.04 + 4.0 0.05 + 5.0 0.066.0 0.07 7.0 0.08 8.0 0.10 +10 T TTTT 1.6 1.7 200 - 9 9 6 1.8 1.9 2.0 8 3 --- 0.15+15 7 0.20+20 2.2 150 0.010 0.009 0.008 0.007 100- -0.006 90 80 +0.005 I 6 8 2.4 0.30+30 2 2.6 0.40 + 40 0.50 +50 9 2.8 70 - 10 0.60 +60 0.7070 0.80 +80 - 3.0 60 0.004 50 0.003 n = 0.013
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