Unformatted text preview: 50 to 300 ft3/s of
runoff water. Design constraints are that (1) the water depth
should be no more than threefourths 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° unfinishedconcrete
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 weedyearth 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 sharpedged
weir across the channel so that the water depth 1 km upstream remains at 2...
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 Spring '08
 Sakar

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