Evaporation m (Water Overlay): Difference between revisions
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[[File: | [[File:Evapotranspiration.jpg|thumb|Image of the [[Evapotranspiration model (Water Overlay)|Evapotranspiration model]] in the [[Water Module]]]] | ||
* A maximum of {{array max|pairs}} can be defined. | * A maximum of {{array max|pairs}} can be defined. | ||
* Internally each period with amount values are converted to an evaporation rate per second at a particular time in the simulation. | * Internally each period with amount values are converted to an evaporation rate per second at a particular time in the simulation. | ||
* The default value is set to 0.125 mm in 2 hours (0.000125 m in 7200 seconds), which corresponds to '''1.5 mm per day'''. This value is derived from the theory described in 2.3 Gewasverdamping | * The default value is set to 0.125 mm in 2 hours (0.000125 m in 7200 seconds), which corresponds to '''1.5 mm per day'''. This value is derived from the theory described in 2.3 Gewasverdamping{{ref|GWZ2016}} in the book Grondwaterzakboekje, which combines the formula of Makkink with a temperature dependent factor{{ref|GWZ2016-2}} (which is approximately linear between 0 and 24 C). Based on the graph{{ref|GWZ2016-3}} with plotted lines of reference evaporation for certain months and cloudiness. The evaporation rate was selected as an average of march, june and september, for a cloudy rainy day, which corresponds to a heavy rainfall event. | ||
|seealso= | |seealso= | ||
* [[Water evaporation factor (Water Overlay)]] | * [[Water evaporation factor (Water Overlay)]] | ||
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|references= | |references= | ||
<references> | <references> | ||
{{ref|GWZ2016 | |||
|name=Grondwaterzakboekje, Gwz2016 (Impressed druk en print) | |||
|author=Makkink, Bram Bot (2016) | |||
|page=2.3 Gewasverdamping, Referentiegewasverdamping | |||
|source= | |||
|link= | |||
|lastvisit= | |||
}} | |||
{{ref|GWZ2016-2 | |||
|name=Grondwaterzakboekje, Gwz2016 (Impressed druk en print) | |||
|author=Makkink, Bram Bot (2016) | |||
|page=Tabel 2.3 Benadering van <math>\frac{\Delta}{\Delta + \gamma}</math> en <math>\frac{\gamma}{\Delta + \gamma}</math> | |||
|source= | |||
|link= | |||
|lastvisit= | |||
}} | |||
{{ref|GWZ2016-3 | |||
|name=Grondwaterzakboekje, Gwz2016 (Impressed druk en print) | |||
|author=Makkink, Bram Bot (2016) | |||
|page=Fig. 2.7 referentiegewasverdamping | |||
|source= | |||
|link= | |||
|lastvisit= | |||
}} | |||
</references> | </references> | ||
}} | }} | ||
{{WaterOverlay simulation data nav}} | {{WaterOverlay simulation data nav}} | ||
Latest revision as of 13:39, 17 October 2025
| Attribute | Unit | Description |
|---|---|---|
| EVAPORATION_M | end-time, m | An array of values, each pair indicating until what time that period of evaporation will last and what amount evaporates in that period. |
Notes

- A maximum of 10.000 values (5.000 pairs) can be defined.
- Internally each period with amount values are converted to an evaporation rate per second at a particular time in the simulation.
- The default value is set to 0.125 mm in 2 hours (0.000125 m in 7200 seconds), which corresponds to 1.5 mm per day. This value is derived from the theory described in 2.3 Gewasverdamping[1] in the book Grondwaterzakboekje, which combines the formula of Makkink with a temperature dependent factor[2] (which is approximately linear between 0 and 24 C). Based on the graph[3] with plotted lines of reference evaporation for certain months and cloudiness. The evaporation rate was selected as an average of march, june and september, for a cloudy rainy day, which corresponds to a heavy rainfall event.
How-to's
See also
- Water evaporation factor (Water Overlay)
- Ground transpiration formula (Water Overlay)
- Surface evaporation formula (Water Overlay)
- Evapotranspiration model (Water Overlay)
References
- ↑ Grondwaterzakboekje, Gwz2016 (Impressed druk en print) ∙ Makkink, Bram Bot (2016) ∙ Page(s): 2.3 Gewasverdamping, Referentiegewasverdamping
- ↑ Grondwaterzakboekje, Gwz2016 (Impressed druk en print) ∙ Makkink, Bram Bot (2016) ∙ Page(s): Tabel 2.3 Benadering van en
- ↑ Grondwaterzakboekje, Gwz2016 (Impressed druk en print) ∙ Makkink, Bram Bot (2016) ∙ Page(s): Fig. 2.7 referentiegewasverdamping




