3- Find maximum flow rate of rectangular channel of bottom width 6.2m and flow depth 1.4m, use bed slope 1:0.00034 and n=0.02.Also Find Flow velocity by using manning formula.

4.61. Water flows at 11 m³/s in a rectangular channel of width 5 m. The slope of the channel is 0.1% and the Manning roughness coefficient is equal to 0.035. If the depth of flow at a selected section is 2 m, calculate the upstream depths at 20 m intervals along the channel until the depth of flow is within 5% of the uniform flow depth.

Water flows in a 8-m-wide rectangular channel that has a longitudinal slope of 0.01%. The channel has an equivalent sand roughness of 2 mm. Calculate the uniform-flow depth in m when the flow rate is 12 m3/s. Use the Darcy–Weisbach equation.

The Chezy coefficient is 80 for flow in a rectangular channel that has a width of 3 m and normal depth of 1.5 m. What is the velocity in the channel if the bottom slope is 0.016? a. 2.19 m/s b. 7.16 m/s c. 8.76 m/s d. 39.44 m/s