Chapt10

A 10 m b 126 m c 15 m d 187 m e 20 m fe107

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Unformatted text preview: 50 to 300 ft3/s of runoff water. Design constraints are that (1) the water depth should be no more than three-fourths of the diameter and (2) the flow should always be subcritical. What is the appropriate pipe diameter to satisfy these requirements? If no commercial pipe is exactly this calculated size, should you buy the next smallest or the next largest pipe? C10.3 Extend Prob. 10.72, whose solution was V2 4.33 m/s. Use gradually varied theory to estimate the water depth 10 m downstream at section (3) for (a) the 5° unfinished-concrete slope shown in Fig. P10.72. (b) Repeat your calculation for an upward (adverse) slope of 5°. (c) When you find that part (b) is impossible with gradually varied theory, explain why and repeat for an adverse slope of 1°. Design Projects | v v D10.1 A straight weedy-earth channel has the trapezoidal shape of Fig. 10.7, with b 4 m and 35°. The channel has a constant bottom slope of 0.001. The flow rate varies seasonally from 5 up to 10 m3/s. It is desired to place a sharp-edged weir across the channel so that the water depth 1 km upstream remains at 2...
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