Question

Find the rate of flow for a rectangular channel 4m wide and a uniform flow depth of 2.0m. The channel is having bed slope as 1 in 100. The Chezy’s constant C is 55.

• A. 444 m\(^3\)/s
• B. 5.5 m\(^3\)/s
• C. 4.4 m\(^3\)/s
• D. 44 m\(^3\)/s

Hint:

Use Chezy’s formula for flow rate calculation in open channel hydraulics.

Answer 1

The Correct Option is D

The rate of flow for a rectangular channel can be calculated using the Chezy’s formula: \[ Q = \frac{1}{n} \cdot A \cdot R^{2/3} \cdot S^{1/2} \] where \( A \) is the cross-sectional area, \( R \) is the hydraulic radius, and \( S \) is the slope. The flow rate is calculated to be 44 m\(^3\)/s.