The main purpose of a spillway at a storage dam is to:
Correct answer: D. Release surplus water safely
- A. Raise the downstream riverbed
- B. Increase the reservoir storage limit
- C. Measure groundwater infiltration
- D. Release surplus water safely
Explanation
A spillway conveys excess reservoir water downstream when the water level approaches or exceeds the safe operating level. It protects the dam from overtopping, whereas outlets are normally used for controlled routine releases.
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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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