Question: A rectangular channel with a 1 2 m bottom width consists of three reaches of different slopes as shown in the figure. The channel has

A rectangular channel with a

12 m

bottom width consists of three reaches of different slopes as shown in the figure. The channel has a roughness coefficient

n = 0.02

and carries a discharge of

13.5 \frac{m^{3}}{s} .

1)

Determine the normal and critical depths in each reach

2)

Sketch and classify the flow profiles. Even though the reach lengths are given, assume that they are sufficiently long to force the water to flow at normal depth at some point in each reach.

A rectangular channel with a 1 2 m bottom width

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