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Homework Help: Open Channel Flow: Specific Energy

  1. Sep 6, 2011 #1
    A trapezoidal channel with bottom width b = 30ft, side slopes m = 2, and flow Q = 5100cfs given, and I am supposed to plot a specific energy curve (E vs y). That part I have done.

    For the second part, it is given that 3 bridge piers, each 2 ft wide, are spanning the channel. With the same m and b = 30-3(2) = 24 ft, I need to calculate another specific energy curve.

    Question: Is it really that easy? Just change the corresponding x-s area A because of the new b, or does the flow change as well?

    Thanks in advance!
  2. jcsd
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