Design the most efficient trapezoidal channel to carry 600 cfs at a maximum velocity of 3.00 ft/sec. Use n = 0.025 and side slopes of 1 vertical on 2 horizontal. Which canal structure shown in Fig. 10-19 will carry the greater flow if both are laid on the same slope? Ans. (b) trapezoidal section 10.89. A square box culvert is 8 ft on a side and is installed as shown in Fig. 10-20. What is the hydraulic radius for a depth of 7.66 ft?
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