Question

How the best hydraulic channel cross-section is defined?

• A. The section with minimum roughness coefficient
• B. The section that has a maximum area for a given flow
• C. The section that has a minimum wetted perimeter
• D. The section that has a maximum wetted area

Answer 1

Answer:

C. The section that has a minimum wetted perimeter

A section of a channel is said to be most economical when the cost of construction of the channel is minimum. But the cost of construction of a channel depends upon the excavation and the lining. To keep the cost down or minimum, the wetted perimeter, for a given discharge should be minimum.