Question: 4 . In a rectangular channel water is flowing at a depth of y = 1 . 5 m and velocity of V 1 =

4. In a rectangular channel water is flowing at a depth of y =1.5 m and velocity
of V1=1 m/s. At downstream discharge suddenly reduced by 60%(i.e. to
the 40% of its original value) causing a surge wave propagating upstream.
Determine the velocity behind the surge and the speed of surge wave c.

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