Chapt10

27 ft y n 414 ft y l 4 ft s0 00048 l e108a x0 xl thus

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Unformatted text preview: rate numerically with 5 ft to determine when the depth y 4 ft is achieved. Tabulate some values: x, ft 0 50 100 150 200 3.00 3.25 3.48 3.70 3.90 y x 230 y, ft 4.00 The water depth, still supercritical, reaches y x 4 ft at 230 ft downstream Ans. We verify from Fig. 10.14a that water depth does increase downstream on an S-3 curve. The solution curve y(x) is shown as the bold line in Fig. E10.8b. 5 yc 4 P r e s e n t ex yn Present example e ution curv ample sol 3 y 2 1 0 Other S – 3 solution curves 0 50 v | | e-Text Main Menu 100 150 200 x E10.8b v 686 | Textbook Table of Contents 250 230 ft | Study Guide 10.7 Flow Measurement and Control by Weirs 687 For little extra effort we can investigate the entire family of S-3 solution curves for this problem. Figure E10.8b also shows what happens if the initial depth is varied from 0.5 to 3.5 ft in increments of 0.5 ft. All S-3 solutions smoothly rise and asymptotically approach the uniformflow condition y yn 4.14 ft. The solution curves in Fig. 10.14 are somewhat simplist...
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