WMS:OC Rational Sub-area Data: Difference between revisions
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*'''Area''' – The sub-area area (acres or ha.) can be automatically computed when using a DEM or TIN | *'''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. | *'''% 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=== | ===Initial Sub-area=== | ||
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* '''Fp''' – Pervious area loss rate | * '''Fp''' – Pervious area loss rate | ||
* '''Fm''' – Maximum area [[WMS:OC Losses|loss rate]] | * '''Fm''' – Maximum area [[WMS:OC Losses|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. | |||
Revision as of 23:37, 13 February 2013
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
- Losses
- Initial Sub-area Time of Concentration
- Orange County Rational Equation
- Orange County Rational Method
- Reach Routing
- Creating Watershed Models
WMS – Watershed Modeling System | ||
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