WMS:OC Rational Equation: Difference between revisions

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Flows for the Orange County rational method are calculated from the following equation:
#redirect [[WMS:Orange_County_Rational_Method#OC_Rational_Equation]]
 
Q = 0.90(I - F<sub>m</sub>)A
 
where:
 
* Q - peak flow (ft<sup>3</sup>/s or m<sup>3</sup>/s)
* I - rainfall intensity (in/hr, mm/hr)
* F<sub>m</sub>- maximum [[WMS:OC Losses|loss rate]], where F<sub>m</sub> = a<sub>p</sub> * F<sub>p</sub>
* A - catchment area (acres)
 
This equation is very similar to the traditional [[WMS:Rational Method Equation|Rational Method equation]]. The term I - F<sub>m</sub> is often referred to as the effective precipitation.
 
 
==Related Topics==
* [[WMS:OC Losses|Losses]]
 
 
{{WMSMain}}

Latest revision as of 21:30, 21 November 2023