Hydrological attributes of terrains (Water Overlay): Difference between revisions
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[[Terrain]]s in a project have a number of hydrological properties which can influence the flow of water in a project. Because there is always both surface and underground terrain defined for the entirety of the project area, all cells are affected by all properties of terrains, unless a [[hydrological attributes of | [[Terrain]]s in a project have a number of hydrological properties which can influence the flow of water in a project. Because there is always both surface and underground terrain defined for the entirety of the project area, all cells are affected by all properties of terrains, unless a [[hydrological attributes of buildings (Water Overlay)|building]] is present with overwriting values. | ||
{{terrain attributes|suppresscategory=true|allowselflinks=true| | {{terrain attributes|suppresscategory=true|allowselflinks=true| | ||
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{{article end | {{article end | ||
|notes= | |notes= | ||
* In general, surface terrain attributes can be overridden by [[hydrological attributes of constructions (Water Overlay)|attributes of | * In general, surface terrain attributes can be overridden by [[hydrological attributes of constructions (Water Overlay)|attributes of building]]s on the surface, even when the attribute values of the construction are set to 0. | ||
}} | }} | ||
{{WaterOverlay terrain attribute nav}} | {{WaterOverlay terrain attribute nav}} | ||
[[Category:Water Module]] | [[Category:Water Module]] | ||
Revision as of 11:02, 5 October 2022
Terrains in a project have a number of hydrological properties which can influence the flow of water in a project. Because there is always both surface and underground terrain defined for the entirety of the project area, all cells are affected by all properties of terrains, unless a building is present with overwriting values.
| Icon | Attribute | Unit | Layer | Range | Description |
|---|---|---|---|---|---|
| WATER | nominal | Surface | Whether this Terrain Type represents a form of water (and what type). | ||
 |
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. | |
 |
WATER_EVAPORATION_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 evaporation. | |
 |
HYDRAULIC_CONDUCTIVITY_MD | m/day | Ground | The hydraulic conductivity (symbolically represented as K) is defined as the speed by which water moves through the saturated zone horizontally. | |
 |
WATER_STORAGE_PERCENTAGE | fraction (m3/m3) | Ground | The percentage (as a fraction) of the ground layer volume which can be filled with water. A lower percentage means the ground layer will be able to store less water, and the saturated zone will rise higher with the same amount of water in the ground layer. | |
 |
GROUND_INFILTRATION_MD | m/day | Surface | The speed at which water can flow vertically from the surface to the unsaturated zone. | |
| |
GROUND_INFILTRATION_MD | m/day | Ground | The speed at which water can flow vertically from the surface to the unsaturated zone. | |
 |
WATER_MANNING | s/(m1/3) | Surface | The Gauckler–Manning coefficient of the terrain, which is a measure of surface roughness. Used in the surface flow computation of the Water Overlay. |
Notes
- In general, surface terrain attributes can be overridden by attributes of buildings on the surface, even when the attribute values of the construction are set to 0.
- Group
- Terrain attributes