Season formula (Water Overlay): Difference between revisions
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The season fraction and index are variables used for calculating the | The season fraction and index are variables used for calculating the evaporation 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 transpiration (Function Value)|transpiration factors]]. | ||
Transpiration month, day of month and corresponding transpiration factor array value: | Transpiration month, day of month and corresponding transpiration factor array value: | ||
| Line 17: | Line 17: | ||
| July | | July | ||
| 15 | | 15 | ||
| | | 3rd | ||
|- | |- | ||
| September | | September | ||
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==Transpiration factor graphs== | ==Transpiration factor graphs== | ||
The transpiration graphs | The transpiration graphs show the transpiration factor as a percentage per day. These are based on ''Table 2.10 Cropfactors'' of the Gwz2016 book{{ref|GWZ2016}}. 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. Values between the control points are obtained by interpolation. | ||
<gallery> | <gallery> | ||
File:seasonal_evap_grass.jpg | File:seasonal_evap_grass.jpg | ||
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{{article end | {{article end | ||
|notes= | |notes= | ||
* The growth season dates are determined based on western | * 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. | ||
|seealso= | |seealso= | ||
* [[Ground transpiration formula (Water Overlay)]] | * [[Ground transpiration formula (Water Overlay)]] | ||
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}} | }} | ||
</references> | </references> | ||
|api=*[[Api session event editor building set function value]] | |||
*[[Api session event editor functionoverride set function value]] | |||
}} | }} | ||
{{WaterOverlay formula nav}} | {{WaterOverlay formula nav}} | ||
Latest revision as of 13:18, 14 July 2026
The season fraction and index are variables used for calculating the evaporation 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) transpiration factors.
Transpiration month, day of month and corresponding transpiration factor array value:
| Month | Day of Month | Transpiration value |
|---|---|---|
| March | 15 | 1st |
| April | 15 | 2nd |
| July | 15 | 3rd |
| September | 15 | 4th |
| October | 1 | 1st |
Transpiration factor graphs
The transpiration graphs show the transpiration factor as a percentage per day. These are based on Table 2.10 Cropfactors of the Gwz2016 book[1]. 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. Values between the control points are obtained by interpolation.
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
- Ground transpiration formula (Water Overlay)
- Start date ms (Water Overlay)
- Water transpiration factor (Water Overlay)
API Endpoints
- Api session event editor building set function value
- Api session event editor functionoverride set function value
References
- ↑ Grondwaterzakboekje, Gwz2016 (Impressed druk en print) ∙ Makkink, Bram Bot (2016) ∙ Page(s): Table 2.10 Gewasfactoren, % van referentiegewasverdamping
- Models
- Surface • Ground • Rain • Evapotranspiration • 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