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Calculate Froude Number for Any Channel:
Channel flow (Q - cfs or cms)
Cross sectional area (A - sf or sm)
Top width of channel (B - ft or m)
Fr = (((Q^2)B)/((g(A^3)))^0.5 =
If Fr = 1 then flow is critical. Fr > 1 then flow is supercritical.
If Fr < 1 then flow is subcritical.
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