Question: A rectangular channel has a gradual contraction in width from (59 mathrm{ft}) to (30 mathrm{ft}) and a bed level drop of (6 mathrm{in}). below the

A rectangular channel has a gradual contraction in width from $59 \mathrm{ft}$ to $30 \mathrm{ft}$ and a bed level drop of $6 \mathrm{in}$. below the upstream channel bed, which the increased velocity caused by the contraction scoured. If the upstream and downstream flow depths are both $10.1 \mathrm{ft}$, compute the discharge in the channel.

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