cee4324-5984_lecture17

# cee4324-5984_lecture17 - Glenn E Moglen Department of...

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Unformatted text preview: Glenn E. Moglen Department of Civil & Environmental Engineering Virginia Tech Begin Surface Water Profiles CEE 4324/5984 –Open Channel Flow – Lecture 17 Questions from Lecture 17? Begin Surface Water Profiles “Rules of the Game” Today’s Agenda: Example 22: A Few More Normal Depth Calculations Example Q (ft 3 /s) y (ft) n b (ft) m S (ft/ft) F r 20 100 1.21 0.03 20 2 0.005 0.62 21 100 0.81 0.03 20 2 0.02 1.17 22a 100 0.71 0.012 20 2 0.005 1.43 22b 100 2.31 0.03 5 2 0.005 0.63 22c 1000 4.49 0.03 20 2 0.005 0.73 22d 100 2.16 0.03 10 0.005 0.55 22e 100 0.83 0.03 40 0.005 0.58 Example 22: Take-away facts As evidenced by the Froude number, this example shows that whether a reach is “mild” or “steep” is a function of all terms in Manning’s equation. The “Goal Seek” function in Excel is a useful tool for finding normal depths quickly/easily. Example 23: Brief Return to the Sluice Gate Problem Use conditions for Example 22d: q = 10 ft 2 /s y = 2.16 ft...
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cee4324-5984_lecture17 - Glenn E Moglen Department of...

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