There are two ways of determining the flow classification (subcritical, critical, or supercritical) in an open channel:
(a) compute the Froude number (if NF < I, subcritical, if NF > I, supercritical), or
(b) compute critical depth (ye) and compare it with the depth of flow (v). If y > Yn then flow is subcritical; if y < Yn then flow is supercritical. From Example 6.5, compute the flow classification at the transition entrance (where y == 3. 60 m) using both methods.