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A 10-m wide, rectangular, concrete-lined canal (n=0.013) has a bottom slope of 0.01 and a constant-level...

A 10-m wide, rectangular, concrete-lined canal (n=0.013) has a bottom slope of 0.01 and a constant-level lake at the upstream end. The steep canal carries a flow of is 250 m3/s and the critical and normal depths are 4m and 2.37m, respectively. The water level in the lake is 6.0 m above the bottom of the canal at the entrance. If the entrance losses are negligible, using Direct Step Method determine; i. The flow depth 812 m downstream of the canal entrance; and ii. The distance from the lake where the flow depth is 2.5 m. iii. Sketch the water profile.

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