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

From Tygron Support wiki
Jump to navigation Jump to search
No edit summary
No edit summary
Line 1: Line 1:
{{terrain attributes
{{terrain attributes|suppresscategory=true|
{{:Root depth m (Terrain Attribute)}}
{{:Root depth m (Terrain Attribute)}}
}}
}}
Line 6: Line 6:


====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 transpire.
{{: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 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.
 
[[File:Feddes_trapezium.jpg|400px]]


{{article end
{{article end

Revision as of 15:22, 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
Benchmarks button.png
Introduction button.png
Water Module
Benchmarks button.png
Getting started button.png
Tutorials
Benchmarks button.png
Overview button.png
Overview
Benchmarks button.png
Theory button.png
Theory
Benchmarks button.png
Benchmarks button.png
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
Retrieved from "https://support.tygron.com/w/index.php?title=Terrain_root_depth_m_(Water_Overlay)&oldid=59493"