Evaporation m (Water Overlay): Difference between revisions

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|{{anchor|EVAPORATION_M|[[evaporation_m_(Water_Overlay)|EVAPORATION_M]]}}
|{{anchor|EVAPORATION_M|[[evaporation_m_(Water_Overlay)|EVAPORATION_M]]}}
|end time, m/day
|{{time sequence end}}, m
|An [[Attribute array|array]] of values, each pair indicating until what time that period of evaporation will last and what the evaporation rate is in that period.
|An [[Attribute array|array]] of values, each pair indicating until what time that period of evaporation will last and what amount evaporates in that period.
|}
|}
{{article end
|notes=
[[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.
* 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{{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=
* [[Water evaporation factor (Water Overlay)]]
* [[Ground transpiration formula (Water Overlay)]]
* [[Surface evaporation formula (Water Overlay)]]
* [[Evapotranspiration model (Water Overlay)]]
|howtos=
* [[How to configure more realistic evaporation rates for a Water Overlay]]
|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>
}}
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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

Image of the Evapotranspiration model in the Water Module
  • 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

References

  1. ↑ Grondwaterzakboekje, Gwz2016 (Impressed druk en print) ∙ Makkink, Bram Bot (2016) ∙ Page(s): 2.3 Gewasverdamping, Referentiegewasverdamping
  2. ↑ Grondwaterzakboekje, Gwz2016 (Impressed druk en print) ∙ Makkink, Bram Bot (2016) ∙ Page(s): Tabel 2.3 Benadering van ΔΔ+γ en γΔ+γ
  3. ↑ Grondwaterzakboekje, Gwz2016 (Impressed druk en print) ∙ Makkink, Bram Bot (2016) ∙ Page(s): Fig. 2.7 referentiegewasverdamping
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