Unformatted text preview: similar to Fig. P10.124. Assume that the river is a weedyearth rectangular channel 100 ft wide with a flow rate of
800 ft3/s. Estimate the water-depth 2 mi upstream of the
dam if S0 0.001.
P10.126 Suppose that the rectangular channel of Fig. P10.120 is
made of riveted steel and carries a flow of 8 m3/s on a 12 m 3/s Slope
100 m 200 m P10.128 Word Problems W10.2 W10.3 W10.4 W10.5 W10.6
W10.7 Free-surface problems are driven by gravity. Why do so
many of the formulas in this chapter contain the square
root of the acceleration of gravity?
Explain why the flow under a sluice gate, Fig. 10.10, either is or is not analogous to compressible gas flow
through a converging-diverging nozzle, Fig. 9.12.
In uniform open-channel flow, what is the balance of
forces? Can you use such a force balance to derive the
Chézy equation (10.13)?
A shallow-water wave propagates at the speed c0
(gy)1/2. What makes it propagate? That is, what is the balance of forces in such wave motion? In which direction
does such a wave propagate?
Why is the Mannin...
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- Spring '08