Evaporation m (Water Overlay)

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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 evaporation 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. 2.3 Gewasverdamping, Referentiegewasverdamping, Bram Bot (2016) ∙ Grondwaterzakboekje, Gwz2016 ∙ Impressed druk en print
  2. Tabel 2.3 Benadering van en , Bram Bot (2016) ∙ Grondwaterzakboekje, Gwz2016 ∙ Impressed druk en print
  3. Fig. 2.7 referentiegewasverdamping, Bram Bot (2016) ∙ Grondwaterzakboekje, Gwz2016 ∙ Impressed druk en print