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Unformatted text preview: (b) V2, (c) the critical
depth, in cm, and (d ) the percentage of dissipation.
Consider the flow under the sluice gate of Fig. P10.84.
If y1 10 ft and all losses are neglected except the
dissipation in the jump, calculate y2 and y3 and the percentage of dissipation, and sketch the flow to scale
with the EGL included. The channel is horizontal and
wide.
In Prob. 10.72 the exit velocity from the sluice gate is
4.33 m/s. If there is a hydraulic jump just downstream of
section 2, determine the downstream (a) velocity, (b) Textbook Table of Contents  Study Guide 702 Chapter 10 OpenChannel Flow
trolvolume sketch of a sloping jump to show why this
is so. The slopedjump chart given in Chow’s figure
1520 may be approximated by the following curve fit:
Jump y1 2y2
y1 y2 V1 = 2 ft / s y3 P10.92 P10.86 P10.87 P10.88 P10.89 y1 = 30 cm 8 Fr2 )1/2
1 1]e3.5S0 where 0 S0 0.3 are the channel slopes for which data
are available. Use this correlation to modify your solution to Prob. 10.89. If time permits, make a graph of y2/y1
( 20) versus...
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 Spring '08
 Sakar

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