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In: Civil Engineering

A flow of 2.0 m3 /s is carried in a rectangular channel of 1.8 m width...

A flow of 2.0 m3 /s is carried in a rectangular channel of 1.8 m width at a depth of 1.0 m (section 1). There is an upward step of 0.18 m together with a contraction where b reduces to 1.4 m (section 2).

a) Draw the side view and top view of the channel described above.

b) Calculate the specific energy at section 1 and plot the specific energy curve. Show y1, E1, V1 2 /2g on the curve.

c) Find the water depth on the step (i.e. y2) and check the choking condition (i.e. state if choking occurs).

d) If choking occurs what is the necessary change in specific energy and depth at section 1 to overcome choking?

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