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;N :Number of days in the month
 
;N :Number of days in the month
   −
;P :Perimeter of infiltration practice or swale x-section (m)
+
;x :Perimeter of infiltration practice or swale x-section (m)
   −
;q :Infiltration rate in (length per time, usually mm/hr)
+
;f':Design infiltration rate (length per time, usually mm/hr) after application of safety correction factor (SCF)
 
  −
;q':Infiltration coefficient in (length per time, usually mm/hr) after application of safety correction factor (SCF)
      
;Q<sub>p</sub> :Peak flow in units of volume per time (e.g. m<sup>3</sup>/s)
 
;Q<sub>p</sub> :Peak flow in units of volume per time (e.g. m<sup>3</sup>/s)
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;R<sub>b</sub> :Rise of compensation gradient for an enhanced swale (length, usually m)
 
;R<sub>b</sub> :Rise of compensation gradient for an enhanced swale (length, usually m)
   −
;RVC<sub>T</sub> :Runoff volume control target (as outlined by MOECC, units are mm)
+
;RVC<sub>T</sub> :Runoff volume control target (as outlined by MECP, units are mm)
    
;S<sub>0</sub> :Longitudinal slope (m/m, i.e. dimensionless)
 
;S<sub>0</sub> :Longitudinal slope (m/m, i.e. dimensionless)
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;V :Volume (usually in m<sup>3</sup>)
 
;V :Volume (usually in m<sup>3</sup>)
   −
;V<sub>R</sub> :Void ratio, as usually applied to aggregates and yard materials. In this guide, it is also applied to native soils in lieu of porosity (unit for both are vol/vol, i.e. dimensionless)
+
;n :Porosity, applies to aggregate and other void-forming materials, filter media and native soils (unit is vol/vol, so dimensionless)
    
;y :Depth of water (L, usually m or sometimes mm)
 
;y :Depth of water (L, usually m or sometimes mm)

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