A trapezoidal channel having a bed slope of 15 cm/km conveys water at a rate of 12.0 /s. The channel has a bed width of 6.0 m and a side slope of 2: 1. The Chezy coefficient is 40 (metric). A dam is...

A trapezoidal channel having a bed slope of 15 cm/km conveys water at a rate of 12.0

/s. The channel has a bed width of 6.0 m and a side slope of 2: 1. The Chezy coefficient is 40 (metric). A dam is built across the channel at which the water depth is 3.2 m as shown in Figure Pl 5.10. Sketch the water surface profile and estimate its length.