Chapt10

The trapezoidal channel of fig p1017 is made of

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Unformatted text preview: ssuming uniform flow and the rock-friction correlation of Eq. (10.15b), estimate (a) the flow rate if the depth is 2 m and (b) the depth if the flow rate is Textbook Table of Contents | Study Guide 698 Chapter 10 Open-Channel Flow P10.27 P10.28 15 m3/s. (c) In part (a) what is the equivalent value of Manning’s roughness factor n for the same flow rate? Does your result agree with Table 10.1? A circular unfinished-cement water channel has a slope of 1:600 and a diameter of 5 ft. Estimate the normal discharge in gal/min for which the average wall shear stress is 0.15 lbf/ft2, and compare your result to the maximum possible discharge for this channel. Show that, for any straight prismatic channel in uniform flow, the average wall shear stress is given by ( P10.31 P10.35 If you happen to spot this result early, you can use it in solving Prob. 10.27. Suppose that the trapezoidal channel of Fig. P10.17 contains sand and silt which we wish not to erode. According to an empirical correlation by A. Shields in 1936, the average wall shear stress crit required to er...
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This note was uploaded on 10/27/2009 for the course MAE 101a taught by Professor Sakar during the Spring '08 term at UCSD.

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