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Question: a rectangular channel 20 feet wide carries a discharge of...

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A rectangular channel 20 feet wide carries a discharge of 29 cfs (cubic feet per second). At a certain section the channel transitions from rough to smooth. The normal depths in these two regimes are 2.92 feet (rough) and 2.27 feet (smooth). The channel slope is 0.005. Using a single step of the direct-step method, estimate the the length of the reach of nonuniform flow.

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