In a prismatic open channel with uniform flow, which condition is satisfied?
Correct answer: B. Depth and mean velocity remain constant along the channel
- A. Depth increases rapidly in the flow direction
- B. Depth and mean velocity remain constant along the channel
- C. The water surface is always horizontal
- D. The flow must have a Froude number of one
Explanation
Uniform flow has constant depth, velocity and discharge along the channel. The water surface generally follows the bed slope, and the flow may be subcritical or supercritical rather than necessarily critical.
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About Hydraulics and Water Resources
Hydraulics studies fluid properties, pressure, buoyancy, continuity, Bernoulli's equation, momentum, pipe flow, open-channel flow and hydraulic machines. Water resources extends these principles to pumps, turbines, reservoirs, irrigation, floods and hydrology, while distinguishing laminar from turbulent flow and uniform from gradually varied channel flow.
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