Question

How is the best hydraulic channel cross-section defined? A) the section with minimum roughness coefficient. B) the section that has a maximum area of a given flow. C) the section that has a minimum wetted perimeter d) the section that has a maximum wetted area.

Answer 1

D one is your answer

Answer 2

Answer:

(C)the section that has a miniumum wetted perimeter is best hydraulic section

Explanation:

The discharge along hydraulic channel cross section is given by the equation

$Q=A.\frac{1}{n}(\frac{A}{P})^{\frac{2}{3}}\sqrt{S_{0}}$

Where,

A=The area of crosd section of hydraulic channel

P=The wetted perimeter of the section

S_{0}=Coefficient of roughness of the section.

Best hydraulic section is defined by having most economical benefit.For that,there must be more discharge in the hydraulic section.From the above equation we interpret that discharge Q is maximum when the Wetted perimeter P is minimum.

Therefore,the section that has a miniumum wetted perimeter(C) is best hydraulic section

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