Difference between revisions of "Weirs"

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*''g'' = Acceleration due to gravity (9.81 m/s<sup>2</sup>)
 
*''g'' = Acceleration due to gravity (9.81 m/s<sup>2</sup>)
 
*''H'' = Height of water over the weir (m)}}
 
*''H'' = Height of water over the weir (m)}}
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==More flow related pages==
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*[[Flow in a swale]]
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*[[Flow through perforated pipe]]
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*[[Flow through an orifice]]

Latest revision as of 17:16, 3 July 2019

The most common form of weir in LID practices is a rectangular weir, in the form of a check dam or flow control in a swale or other open channel.

The flow (Q), may be calculated by measuring the height of water on the sill of the weir:

Where:

  • Cd = discharge coefficient (default 0.62 for a 'sharp edge).
  • L = Length of the weir (m)
  • g = Acceleration due to gravity (9.81 m/s2)
  • H = Height of water over the weir (m)

More flow related pages[edit]