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Trapezoidal
If the flow calculation is to be absolute P702 = 1 the flow will be calculated
using the formula: q = vh (b + mh)
Where: q = flowrate
v = velocity
h = head
b = base width (Dim “B”) P711
m = side slope calculated from
m = (B -b)/d where B = channel top width (Dim “A”) P710,
b = base width (Dim “B”) P711
d = depth of channel (Dim “C”) P712
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