Chapt10

# P10128 the channel is horizontal for 200 m upstream

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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 0.7° 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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