Terrain water transpiration factor (Water Overlay)

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.

Terrains can be configured with plant-related attributes, similar to Buildings configured as crops and foliage, allowing it to draw water from the ground and evaporate it.

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_EVAPORATION_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.
• The groundwater level reduction is inversely proportional to the 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 ground layer decreases.
• When there is no Building present on the surface, and the terrain has a WATER_EVAPORATION_FACTOR of 0, the amount of evaporation which takes place in that location 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

• How to add and remove an Attribute

See also

• Water evaporation factor (Water Overlay)
• Groundwater level formula (Water Overlay)
• Ground evaporation formula (Water Overlay)
• Season formula (Water Overlay)
• Ground model (Water Overlay)
• Evapotranspiration model (Water Overlay)

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Terrain attributes

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 •  Min unsaturated fraction

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Building attributes • Hydrological features • Hydraulic structures • Model attributes • Results • Simulation data