If 'x' is the depth of flow in an open channel of large width, then the hydraulic radius is equal to________________?
Correct answer: A. x
- A. x
- B. x/2
- C. x/3
- D. 2x/3
Explanation
Hydraulic radius is the flow area divided by the wetted perimeter. In a very wide rectangular channel, the width dominates both quantities, so A/P approximately equals the flow depth x.
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