CE Board HGE Problem 70 (Hydraulics and Geotechnical Engineering)

(CE April 2023) A Trapezoidal canal has a bottom width of 6 m and  a side slope of 2 horizontal to 1 vertical. When the depth of the flow is 1.2 m  and the rate of flow is 20.4 m³/s

a. Compute the Specific Energy, in meters
b. If the roughness coefficient, n = 0.015, obtain the Slope of the canal using Manning’s Formula.
c. Compute the Average Shearing Stress at  the Boundary over the surface of the channel, N/m²