In a gradually varied open-channel flow, the pressure distribution is generally assumed to be:
Correct answer: D. Hydrostatic at each section
- A. Controlled only by bed roughness
- B. Uniform throughout the channel length
- C. Equal to atmospheric at every point
- D. Hydrostatic at each section
Explanation
Gradually varied flow changes slowly enough along the channel that vertical accelerations are negligible. The pressure distribution at each cross section can therefore be approximated as hydrostatic.
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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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