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

From XMS Wiki
Jump to navigationJump to search
No edit summary
Line 8: Line 8:


===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===

Revision as of 15:26, 16 October 2017

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

  • – Pervious area percentage
  • – Pervious area loss rate
  • – Maximum area loss rate

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

Related Topics