GATE CE 2019 CE Q48: Hydraulics

At the foot of a spillway, water flows at a depth of 23 cm with a velocity of 8.1 m/s, as shown in the figure.

The flow enters as an M-3 profile in the long wide rectangular channel with bed slope =

and Manning’s

. A hydraulic jump is formed at a certain distance from the foot of the spillway. Assume the acceleration due to gravity,

. Just before the hydraulic jump, the depth of flow

(in m, round off to 2 decimal places) is ________

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