A wide rectangular channel having a bed slope of 4.85 X carries a specific discharge of 2.5 /s. The Chezy roughness coefficient is 45 (metric). A dam is built across the channel at which the depth...

A wide rectangular channel having a bed slope of 4.85 X

carries a specific discharge of 2.5

/s. The Chezy roughness coefficient is 45 (metric). A dam is built across the channel at which the depth of water is measured as 1.8 m. Draw the water surface profile and estimate the length of the backwater curve.