WMS:OC Rational Sub-area Data: Difference between revisions

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===Initial Sub-area===
===Initial Sub-area===
* '''<math>T_c</math>''' &ndash; The time of concentration (min)
* '''T<sub>c</sub>''' &ndash; The time of concentration (min)
* '''Intensity''' &ndash; The rainfall intensity (in/hr) is automatically computed based on the <math>T_c</math>
* '''Intensity''' &ndash; The rainfall intensity (in/hr) is automatically computed based on the T<sub>c</sub>


===Losses===
===Losses===
* '''<math>a_p</math>''' &ndash; Pervious area percentage
* '''a<sub>p</sub>''' &ndash; Pervious area percentage
* '''<math>F_p</math>''' &ndash; Pervious area loss rate
* '''F<sub>p</sub>''' &ndash; Pervious area loss rate
* '''<math>F_m</math>''' &ndash; Maximum area [[WMS:OC Losses|loss rate]]
* '''F<sub>m</sub>''' &ndash; Maximum area [[WMS:OC Losses|loss rate]]
Calculate <math>F_m</math> by toggling on the ''Compute <math>F_m</math>'' checkbox, entering values for <math>a_p</math> and <math>F_p</math>, and using the '''Compute <math>F_m</math>''' button or click on the '''Compute <math>F_m</math> &ndash; GIS''' button to use GIS data.
Calculate F<sub>m</sub> by toggling on the ''Compute F<sub>m</sub>'' checkbox, entering values for a<sub>p</sub> and F<sub>p</sub>, and using the '''Compute F<sub>m</sub>''' button or click on the '''Compute F<sub>m</sub> &ndash; GIS''' button to use GIS data.


==Related Topics==
==Related Topics==
* [[WMS:OC Losses|Losses]]
* [[WMS:OC Losses|Losses]]
* [[WMS:OC Rational Initial Sub-area Time of Concentration|Initial Sub-area Time of Concentration]]
* [[WMS:OC Rational Initial Sub-area Time of Concentration|Initial Sub-area Time of Concentration]]
* [[WMS:OC Rational Equation|Orange County Rational Equation]]
* [[WMS:Orange_County_Rational_Method#OC_Rational_Equation|Orange County Rational Equation]]
* [[WMS:Orange County Rational Method|Orange County Rational Method]]
* [[WMS:Orange County Rational Method|Orange County Rational Method]]
* [[WMS:OC Rational Reach Routing|Reach Routing]]
* [[WMS:OC Rational Reach Routing|Reach Routing]]
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{{WMSMain}}
{{WMSMain}}
[[Category:OC Rational|S]]
[[Category:OC Rational Dialogs|S]]

Latest revision as of 21:34, 21 November 2023

Orange County Rational Method – Edit Parameters dialog

When setting up a Orange County Rational Method simulation, data must be entered for each sub-area.

  • Area – The sub-area area (acres or ha.) can be automatically computed when using a DEM or TIN
  • % Nonmountainous and % Mountainous – The percentage of the sub-area that lies below and above 2000 ft, respectively.

Use the Compute % Mountainous button to calculate these values using a DEM or TIN.

Initial Sub-area

  • Tc – The time of concentration (min)
  • Intensity – The rainfall intensity (in/hr) is automatically computed based on the Tc

Losses

  • ap – Pervious area percentage
  • Fp – Pervious area loss rate
  • Fm – Maximum area loss rate

Calculate Fm by toggling on the Compute Fm checkbox, entering values for ap and Fp, and using the Compute Fm button or click on the Compute Fm – GIS button to use GIS data.

Related Topics


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