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The flow specific energy exceeds the criticalenergy
The flow specific energy exceeds the critical
energy
Flow energy is dominant over the energy associated with the structure in the channel
There is a sudden change in channel geometry (e.g.slope, width etc) over a short length of channel
There is a sudden change in channel geometry (e.g.
slope, width etc) over a short length of channel
Roughnessexceeds a critical value causing flow to suddenly change depth
Roughness
exceeds a critical value causing flow to suddenly change depth
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