Question: A 5 . 0 m wide rectangular channel carries 2 0 m ^ 3 / s of discharge at a depth of 2 . 0

A 5.0 m wide rectangular channel carries 20 m^3/s of discharge at a depth of 2.0 m. The width beyond a certain section is to be changeed to 3 m. If it is desired to keep the water-surface elevation unaffected by this change, what modifications are neede to the bottom elevation?

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