Terrain water transpiration factor (Water Overlay): Difference between revisions

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{{Overlay attribute
{{terrain attributes|suppresscategory=true|<onlyinclude>
|attribute=WATER_EVAPORATION_FACTOR
{{:water transpiration factor (Terrain Attribute)}}</onlyinclude>
|unit=factor
|terraintype=Surface
|description=How fast this terrain can evaporate water from the underground. The [[weather (Water Overlay)|weather]]'s evaporation speed is multiplied by this factor to determine the rate of [[Underground evaporation formula (Water Overlay)|evaporation]].
|icon=[[File:waterwizard_icon_evaporation_factor.png]]
}}
}}
===Plants===
Terrains can be configured with plant-related attributes, similar to [[Water evaporation factor (Water Overlay)#Crops and foliage|crops and foliage]] constructions, allowing it to draw water from the underground and evaporate it.


===Notes===
Like buildings configured as crops and foliage, [[terrain]]s representing plants can use plant-related attributes to draw and evaporate groundwater.
* Because the model assumes evaporation due to plants on the surface, the [[Water Module]] looks at the surface terrain type for this attribute.
* When a construction is present in any given location, the values for evaporation of the construction will overrule any values set by terrain in the same location. This is also true if the construction has its evaporation values set to 0; they will overrule the terrain's values and thus not allow evaporation of underground water to occur.
* The groundwater level reduction is inversely proportional to the [[terrain water storage percentage (Water Overlay)|WATER_STORAGE_PERCENTAGE]], as the contribution of a given volume of water to the groundwater level increases when the capacity for water storage in the underground layer decreases.


==How-to's==
{{article end
* [[How-to add and remove an attribute|Add and remove an attribute]]
|notes=
[[File:Seasonal_evap_grass.jpg|thumb|right|Varying [[Terrain water transpiration factor (Water Overlay)|evaporation factor]] of grass, depending on the [[Season formula (Water Overlay)|time of year]]]]
* For plants to evaporate water, both the [[terrain root depth m (Water Overlay)|ROOT_DEPTH_M]] and the WATER_TRANSPIRATION_FACTOR must be appropriately configured.
* When a Building is present in any given location, the values for evaporation in the ground will overrule any values set by [[Hydrological attributes of terrains (Water Overlay)|terrain]] in the same location. To model ground evaporation without a Building, set the attributes of the Building on the applicable terrain type instead.
* Groundwater level reduction is inversely proportional to the [[terrain water storage percentage (Water Overlay)|WATER_STORAGE_PERCENTAGE]].
* Transpiration is zero when no building is present and the terrain's WATER_TRANSPIRATION_FACTOR is 0.
* Can be configured as a [[Season formula (Water Overlay)|seasonal factor]], represented by an array of four values, one for each [[Season formula (Water Overlay)|growth season]]. This allows for more evaporation during a crops growth season and less during the winter.
|howtos=
* [[How to add and remove an Attribute]]
|seealso=
* [[Water transpiration factor (Water Overlay)]]
* [[Groundwater level formula (Water Overlay)]]
* [[Ground transpiration formula (Water Overlay)]]
* [[Season formula (Water Overlay)]]
* [[Ground model (Water Overlay)]]
* [[Evapotranspiration model (Water Overlay)]]
|api=
* [[Api session event editor terraintype set attribute]]
}}


{{WaterOverlay terrain attribute nav}}
{{WaterOverlay terrain attribute nav}}
{{Water Module buttons}}

Latest revision as of 14:04, 15 July 2026

Icon Attribute Unit Layer Range Description
WATER_TRANSPIRATION_FACTOR factor Surface How fast this terrain can evaporate water from the ground. The weather's evaporation speed is multiplied by this factor to determine the rate of transpiration.

Like buildings configured as crops and foliage, terrains representing plants can use plant-related attributes to draw and evaporate groundwater.

Notes

Varying evaporation factor of grass, depending on the time of year
  • For plants to evaporate water, both the ROOT_DEPTH_M and the WATER_TRANSPIRATION_FACTOR must be appropriately configured.
  • When a Building is present in any given location, the values for evaporation in the ground will overrule any values set by terrain in the same location. To model ground evaporation without a Building, set the attributes of the Building on the applicable terrain type instead.
  • Groundwater level reduction is inversely proportional to the WATER_STORAGE_PERCENTAGE.
  • Transpiration is zero when no building is present and the terrain's WATER_TRANSPIRATION_FACTOR is 0.
  • Can be configured as a seasonal factor, represented by an array of four values, one for each growth season. This allows for more evaporation during a crops growth season and less during the winter.

How-to's

See also

API Endpoints

Water Module
Water Module
Tutorials
Overview
Theory
Benchmarks
Group
Terrain attributes
Ground infiltration md •  Hydraulic conductivity md •  Hydraulic conductivity with thickness md •  Root depth m •  Water •  Water transpiration factor •  Water manning •  Water microrlief m •  Water storage percentage •  Van genuchten m
Related
Building attributes • Hydrological features • Hydraulic structures • Model attributes • Prequels • Results • Simulation data
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