Season formula (Water Overlay): Difference between revisions
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The season fraction and index are variables used for calculating the transpiration factor in the [[Ground evaporation formula (Water Overlay)|Ground evaporation formula]]. It | The season fraction and index are variables used for calculating the transpiration factor in the [[Ground evaporation formula (Water Overlay)|Ground evaporation formula]]. It uses the configured [[Start date ms (Water Overlay)|start date]] of a [[Water Overlay]] and selected months and day of months to determine one of the four configured (seasonal) [[Water evaporation (Function Value)|evaporation factors]]. | ||
Evaporation month indices: | Evaporation month indices: | ||
Revision as of 11:02, 27 February 2024
The season fraction and index are variables used for calculating the transpiration factor in the Ground evaporation formula. It uses the configured start date of a Water Overlay and selected months and day of months to determine one of the four configured (seasonal) evaporation factors.
Evaporation month indices:
| Index | Month | Day of Month | Transpiration value |
|---|---|---|---|
| 2 | March | 15 | 1st |
| 3 | April | 15 | 2nd |
| 6 | July | 15 | 3rth |
| 8 | September | 15 | 4th |
| 9 | October | 1 | 1st |
Evaporation factor graphs
The evaporation graphs showing the evaporation factor as a percentage per day. These are based on Table 2.10 Cropfactors[1] of the Gwz2016 book. The approximated graphs use five control points (see the season table above) per type, such that it can be reduced to four values per year.
Notes
- The growth season dates are determined based on western european growth and transpiration graphs of the following crops and plants: grass, corn, potato, beet, grain, orchard and heather.
See also
References
- ↑ Table 2.10 Gewasfactoren, % van referentiegewasverdamping van Makkink, Bram Bot (2016) ∙ Grondwaterzakboekje, Gwz2016 ∙ Impressed druk en print
- Models
- Surface • Ground • Rain • Evaporation • Infiltration • Elevation • Breach • Sewer • Storage • Tracer flow • Border • Order
- Model formulas
- Timestep • Season • Surface water level • Groundwater level
- Flow formulas
- Surface flow • Surface infiltration • Ground flow • Ground infiltration • Surface evaporation • Ground evaporation • Ground bottom flow
- Hydraulic structure formulas
- Culvert • Weir • Breach growth • Breach flow • Pump • Sewer Overflow • Inlet • Drainage
- Related