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<th>1-yr 24-hr "Kerplunk" (K124)</th>
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<th>1-yr 24-hr Instantaneous volume</th>
 
<th>1-yr 24-hr routed (R124)</th>
 
<th>1-yr 24-hr routed (R124)</th>
<th>1/2 Pre-development  2-yr 24-hr peak "Kerplunk" (R224)</th>
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<th>1/2 Pre-development  2-yr 24-hr peak Instantaneous volume</th>
 
<th>1/2 Pre-development  2-yr 24-hr peak routed (R224)</th>
 
<th>1/2 Pre-development  2-yr 24-hr peak routed (R224)</th>
 
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<p>Note that the routed method for the 1-year design (R124) is much less than the kerplunk method (K124) due to the more constricted orifice.</p>
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<font size=1>Note that the routed method for the 1-year design (R124) is much less than the Instantaneous volume due to the more constricted orifice.</font size>
  
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Latest revision as of 13:37, 3 August 2022

Wet detention pond - Channel protection / water quality outlet configuration
Link to this table

Design methodology
1-yr 24-hr Instantaneous volume 1-yr 24-hr routed (R124) 1/2 Pre-development 2-yr 24-hr peak Instantaneous volume 1/2 Pre-development 2-yr 24-hr peak routed (R224)
Orifice diameter (inches) 10.5 6.9 10.0 11.6
Oriface elevation (ft) 105.0 105.0 105.0 105.0
Surface area at orifice elevation (ac) 0.6 0.6 0.6 0.6
Peak discharge per design event (cfs) 6.4 2.1 5.8 5.8
Peak water elevation per design event (ft) 107.9 108.2 108.7 108.5

Note that the routed method for the 1-year design (R124) is much less than the Instantaneous volume due to the more constricted orifice.

This page was last edited on 3 August 2022, at 13:37.