Terrain root depth m (Water Overlay): Difference between revisions

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{{terrain attributes
{{terrain attributes|suppresscategory=true|<onlyinclude>
| <onlyinclude>
{{:Root depth m (Terrain Attribute)}}</onlyinclude>
{{terrain attributes|type=row|overlay=Water
|attribute=ROOT_DEPTH_M
|unit=m
|layer=Surface
|description=The depth of the roots of the [[Terrain|terrain type]]. This depth is used to determine whether evaporation will occur from the groundwater.
|icon=waterwizard_icon_water_root_depth_m.png
}} </onlyinclude>
}}
}}


[[Terrain]]s can be configured with plant-related attributes, similar to [[construction]]s configured as [[root depth m (Water Overlay)|crops and foliage]], allowing it to draw water from the [[Underground model (Water Overlay)|underground]] and [[Underground evaporation formula (Water Overlay)|evaporate]] it.
[[Terrain]]s can be configured with plant-related attributes, similar to [[Building]]s configured as [[root depth m (Water Overlay)|crops and foliage]], allowing it to draw water from the [[Ground model (Water Overlay)|ground]] and [[Ground evaporation formula (Water Overlay)|evaporate]] it.


====Feddes Trapezium====
====Feddes Trapezium====
Plants can experience oxygen stress when the groundwater level is too high. The plant roots become saturated so that the plant can no longer perspire.
{{:Feddes trapezium}}
To simulate the oxygen stress, the ROOT_DEPTH_M can also be configured with four values instead of one, which will be interpreted using Feddes transpiration model.
In the model, when the groundwater level rises, the perispiration increases. However, at a certain point, the groundwater is too high and the perspiration decreases. Water on the surface can then still  evaporate, but the plant cannot perspire anymore.
<br>
The sequence for the four values should be defined in order of largest to smallest depth values and are interpreted as a 0-1-1-0 transpiration factor trapezium.
[[File:Feddes_trapezium.png]]
 
[[File:YoutubeLogo1.jpg|thumb|left|link=https://www.youtube.com/watch?v=QTHLYorMkk4&t=1032s|Evaporation in the {{software}} (Dutch only)]]{{clear}}


{{article end
{{article end
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* For plants to evaporate water, both the ROOT_DEPTH_M and the [[terrain water evaporation factor (Water Overlay)|WATER_EVAPORATION_FACTOR]] must be appropriately configured.
* For plants to evaporate water, both the ROOT_DEPTH_M and the [[terrain water evaporation factor (Water Overlay)|WATER_EVAPORATION_FACTOR]] must be appropriately configured.
* Trees typically have deeper root than crops.
* Trees typically have deeper root than crops.
* When a construction is present in any given location, the values for evaporation in the underground will overrule any values set by [[Hydrological attributes of terrains (Water Overlay)|terrain]] in the same location. To model underground evaporation without a construction, set the attributes of the construction on the applicable terrain type instead.
* 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.
* When there is no construction present on the surface, and the terrain has a ROOT_DEPTH_M of 0, the amount of evaporation which takes place in that location is 0.
* When there is no Building present on the surface, and the terrain has a ROOT_DEPTH_M of 0, the amount of evaporation which takes place in that location is 0.
|howtos=
|howtos=
* [[How to add and remove an Attribute]]
* [[How to add and remove an Attribute]]
|seealso=
|seealso=
* [[Root depth m (Water Overlay)]]
* [[Depth of plant roots (Function Value)]]
* [[Groundwater level formula (Water Overlay)]]
* [[Groundwater level formula (Water Overlay)]]
* [[Underground evaporation formula (Water Overlay)]]
* [[Ground evaporation formula (Water Overlay)]]
* [[Underground model (Water Overlay)]]
* [[Ground model (Water Overlay)]]
* [[Evaporation model (Water Overlay)]]
* [[Evaporation model (Water Overlay)]]
}}
}}
{{WaterOverlay terrain attribute nav}}
{{WaterOverlay terrain attribute nav}}

Latest revision as of 15:32, 27 February 2024

Icon Attribute Unit Layer Range Description
Waterwizard icon water root depth m.png ROOT_DEPTH_M m Surface The depth of the roots of the terrain type. This depth is used to determine whether evaporation will occur from the groundwater.

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.

Feddes Trapezium

Plants can experience oxygen stress when the groundwater level is too high. The plant roots become saturated so that the plant can no longer transpire. To simulate the oxygen stress, the root depth can also be configured with four values instead of one, which will be interpreted using Feddes transpiration model. In the model, when the groundwater level rises, the transpiration increases. However, at a certain point, the groundwater is too high and the transpiration decreases. Water on the surface can then still evaporate, but the plant cannot transpire anymore.

The sequence for the four values should be defined in order of largest to smallest depth values and are interpreted as a 0-1-1-0 transpiration factor trapezium.

Feddes trapezium.jpg

Notes

  • For plants to evaporate water, both the ROOT_DEPTH_M and the WATER_EVAPORATION_FACTOR must be appropriately configured.
  • Trees typically have deeper root than crops.
  • 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.
  • When there is no Building present on the surface, and the terrain has a ROOT_DEPTH_M of 0, the amount of evaporation which takes place in that location is 0.

How-to's

See also

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