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Unformatted text preview: Fr1 ( 15) for various S0 ( 0.3).
At the bottom of an 80ftwide spillway is a horizontal
hydraulic jump with water depths 1 ft upstream and 10
ft downstream. Estimate (a) the flow rate and (b) the
horsepower dissipated.
Water in a horizontal channel accelerates smoothly over
a bump and then undergoes a hydraulic jump, as in Fig.
P10.93. If y1 1 m and y3 40 cm, estimate (a) V1, (b)
V3, (c) y4, and (d ) the bump height h. P10.84
depth, (c) Froude number, and (d ) percent dissipation.
Neglect the effect of the nonhorizontal bottom (see Prob.
10.91).
A bore is a hydraulic jump which propagates upstream
into a still or slowermoving fluid, as in Fig. 10.4a. Suppose that the still water is 2 m deep and the water behind
the bore is 3 m deep. Estimate (a) the propagation speed
of the bore and (b) the induced water velocity.
A tidal bore may occur when the ocean tide enters an estuary against an oncoming river discharge, such as on the
Severn River in England. Suppose that the tidal bore is
10...
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 Spring '08
 Sakar

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