Question

For a given discharge, the critical flow depth in an open channel depends on

• A. channel geometry and bed slope
• B. channel geometry, bed slope and roughness
• C. channel geometry, bed slope, roughness and Reynolds number
• D. channel geometry only

Answer 1

The correct option is C channel geometry, bed slope, roughness and Reynolds number

It may be noted that the critical flow condition is governed solely by the channel geometry and discharge. Other channel properties such as bed slope and roughness do not influence the critical flow condition for any given discharge.