Accumulated volume inside equalization basin between time intervals
ti and ti+1
Vbasin Volume of equalization basin Vc Average velocity at critical section of open channel
W Throat width of Parshall flume y Depth of channel y1 Open-channel depth at point 1
y2 Open-channel depth at point 2
yc Depth at control section of open channel (the critical depth)
z Side slope of a trapezoidal section z1 Bottom elevation of open channel at point 1
z2 Bottom elevation of open channel at point 2
¡3 Ratio of throat diameter to diameter of pipe, d/D
Y Specific weight of water
Yind Specific weight of manometer indicator fluid
6 Degrees or the 28-degree angle in the Cipolleti weir
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