CE 230Engineering Fluid Mechanics

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CE 230-Engineering Fluid Mechanics
Introduction to uniform flow in open channels
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Uniform flow in open channels

• For this flow the deriving force is gravity which
  means that the channel has to be sloping in the
  flow direction
• An empirical equation is used to analyze this
  type of flow which is called the MANNING EQUATION
  

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terminology
A area P wetted perimeter Hydraulic radius A/P
Manning Equation
SI units
B. units
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10.128 Find average velocity in the shown
concrete lined channel if the Slope is 1 ft in
2000 ft. The depth of flow is 6 ft.
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Example 10.21 modified Determine Q if D 5 ft,
slope 0.001, flow depth 4 ft Concrete sewer
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