Ground infiltration md (Water Overlay): Difference between revisions

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Some [[building]]s can be porous or open and can allow water to infiltrate into the [[Ground model (Water Overlay)|ground unsaturated zone]]. Examples of such buildings are grass, bushes, trees or specialized roads and parking lots.
Some [[building]]s can be porous or open and can allow water to infiltrate into the [[Ground model (Water Overlay)|ground unsaturated zone]]. Examples of such buildings are grass, bushes, trees or specialized roads and parking lots.


The speed at which water can infiltrate is dependent on both the [[Ground infiltration per day (Function Value)|infiltration properties]] of the buildings as well as on the underlying [[Terrain ground infiltration md (Water Overlay)|surface terrain and ground terrain]]. The infiltration value that will be used in the grid cell will be the minimum value of the infiltration values of the building, the surface terrain, and the ground terrain. This also means that if any of the infiltration values is 0, water cannot infiltrate into the unsaturated zone.
Infiltration speed depends on the building's [[Ground infiltration per day (Function Value)|infiltration properties]] and the underlying [[Terrain ground infiltration md (Water Overlay)|surface and ground terrain]]. The grid cell uses the lowest infiltration value among the building, surface terrain, and ground terrain. This also means that if any of the infiltration values is 0, water cannot infiltrate into the unsaturated zone.


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Latest revision as of 12:55, 7 July 2026

Icon Attribute Unit Range Description
GROUND_INFILTRATION_MD m/day The speed at which water can flow vertically from the surface to the unsaturated zone.

Buildings with a significant GROUND_INFILTRATION_MD are known as porous buildings.

Some buildings can be porous or open and can allow water to infiltrate into the ground unsaturated zone. Examples of such buildings are grass, bushes, trees or specialized roads and parking lots.

Infiltration speed depends on the building's infiltration properties and the underlying surface and ground terrain. The grid cell uses the lowest infiltration value among the building, surface terrain, and ground terrain. This also means that if any of the infiltration values is 0, water cannot infiltrate into the unsaturated zone.

Notes

  • Infiltration only takes place when the ground model is active.

How-to's

See also

API Endpoints

Water Module
Water Module
Tutorials
Overview
Theory
Benchmarks
Group
Building attributes
Building height • Critical infrastructure • Ground infiltration md • Root depth m • Sewered • Solid • Water evaporation factor • Water manning • Water microrelief m • Tracer A • Tracer B • Tracer C • Tracer D
Related
Hydrological features • Hydraulic structures •  Terrain attributes • Model attributes • Prequels • Results • Simulation data
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