WMS:OC Rational Equation: Difference between revisions
From XMS Wiki
Jump to navigationJump to search
No edit summary |
No edit summary |
||
| Line 5: | Line 5: | ||
where: | where: | ||
* Q | * Q – peak flow (ft<sup>3</sup>/s or m<sup>3</sup>/s) | ||
* I | * I – rainfall intensity (in/hr, mm/hr) | ||
* F<sub>m</sub> | * F<sub>m</sub> – maximum [[WMS:OC Losses|loss rate]], where F<sub>m</sub> = a<sub>p</sub> * F<sub>p</sub> | ||
* A | * 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. | 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. | ||
Revision as of 20:05, 13 February 2013
Flows for the Orange County rational method are calculated from the following equation:
Q = 0.90(I - Fm)A
where:
- Q – peak flow (ft3/s or m3/s)
- I – rainfall intensity (in/hr, mm/hr)
- Fm – maximum loss rate, where Fm = ap * Fp
- A – catchment area (acres)
This equation is very similar to the traditional Rational Method equation. The term I - Fm is often referred to as the effective precipitation.
Related Topics
WMS – Watershed Modeling System | ||
|---|---|---|
| Modules: | Terrain Data • Drainage • Map • Hydrologic Modeling • River • GIS • 2D Grid • 2D Scatter |  |
| Models: | CE-QUAL-W2 • GSSHA • HEC-1 • HEC-HMS • HEC-RAS • HSPF • MODRAT • NSS • OC Hydrograph • OC Rational • Rational • River Tools • Storm Drain • SMPDBK • SWMM • TR-20 • TR-55 | |
| Toolbars: | Modules • Macros • Units • Digitize • Static Tools • Dynamic Tools • Drawing • Get Data Tools | |
| Aquaveo | ||
