Question: It is desired to excavate a clean-earth channel as a trapezoidal cross-section with = 60 (see Fig. 10.7). The expected flow rate is 500 ft3/s,

It is desired to excavate a clean-earth channel as a trapezoidal cross-section with θ = 60° (see Fig. 10.7). The expected flow rate is 500 ft3/s, and the slope is 8 ft per mile. The uniform flow depth is planned, for efficient performance, such that the flow cross-section is half a hexagon. What is the appropriate bottom width of the channel?

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