Terrain water storage percentage (Water Overlay): Difference between revisions
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{{Overlay | {{terrain attributes | ||
| <onlyinclude> | |||
{{terrain attributes|type=row|group=Water Overlay | |||
|attribute=WATER_STORAGE_PERCENTAGE | |attribute=WATER_STORAGE_PERCENTAGE | ||
|unit=fraction (m<sup>3</sup>/m<sup>3</sup>) | |unit=fraction (m<sup>3</sup>/m<sup>3</sup>) | ||
| | |layer=Underground | ||
|description=The percentage (as a fraction) of the underground volume which can be filled with water. A lower percentage means the underground will be able to store less water, and the saturated zone will rise higher with the same amount of water in the underground layer. | |description=The percentage (as a fraction) of the underground volume which can be filled with water. A lower percentage means the underground will be able to store less water, and the saturated zone will rise higher with the same amount of water in the underground layer. | ||
}} | }} </onlyinclude> | ||
}} | |||
Based on the properties of the [[terrain]], water may infiltrate into the [[Underground model (Water Overlay)|ground layers]]. Two ground layers are distinguished; the underground unsaturated zone and underground saturated zone. | Based on the properties of the [[terrain]], water may infiltrate into the [[Underground model (Water Overlay)|ground layers]]. Two ground layers are distinguished; the underground unsaturated zone and underground saturated zone. | ||
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[[Underground model (Water Overlay)#Horizontal flow and aquifers|Underground flow]], also known as horizontal infiltration, is also dependent on the infiltration properties of the underground, unless an [[Aquifer (Water Overlay)|aquifer]] exists the same location. | [[Underground model (Water Overlay)#Horizontal flow and aquifers|Underground flow]], also known as horizontal infiltration, is also dependent on the infiltration properties of the underground, unless an [[Aquifer (Water Overlay)|aquifer]] exists the same location. | ||
{{article end | |||
|notes= | |||
* Contrary to its name, the [[Terrain water storage percentage (Water Overlay)|WATER_STORAGE_PERCENTAGE]] should always be a '''fraction'''. | * Contrary to its name, the [[Terrain water storage percentage (Water Overlay)|WATER_STORAGE_PERCENTAGE]] should always be a '''fraction'''. | ||
* The groundwater level reduction is related inversely 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 underground layer decreases. | * The groundwater level reduction is related inversely 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 underground layer decreases. | ||
|howtos= | |||
* [[How to add and remove an Attribute]] | * [[How to add and remove an Attribute]] | ||
|seealso= | |||
* [[Groundwater level formula (Water Overlay)]] | |||
* [[Groundwater level formula (Water Overlay) | * [[Underground infiltration formula (Water Overlay)]] | ||
* [[Underground infiltration formula (Water Overlay) | * [[Underground model (Water_Overlay)]] | ||
* [[Underground model (Water_Overlay) | * [[Evaporation model (Water Overlay)]] | ||
* [[Evaporation model ( | * [[Infiltration model (Water Overlay)]] | ||
* [[Infiltration model ( | }} | ||
{{WaterOverlay terrain attribute nav}} | {{WaterOverlay terrain attribute nav}} | ||
Revision as of 07:09, 3 September 2020
| Icon | Attribute | Unit | Layer | Range | Description |
|---|---|---|---|---|---|
| WATER_STORAGE_PERCENTAGE | fraction (m3/m3) | Underground | The percentage (as a fraction) of the underground volume which can be filled with water. A lower percentage means the underground will be able to store less water, and the saturated zone will rise higher with the same amount of water in the underground layer. |
Based on the properties of the terrain, water may infiltrate into the ground layers. Two ground layers are distinguished; the underground unsaturated zone and underground saturated zone.
The speed at which water can infiltrate from the surface to the underground unsaturated zone is dependent on both the GROUND_INFILTRATION_MD of the surface terrain, as well as the GROUND_INFILTRATION_MD of any construction in that location, if present. Of the infiltration values of the construction and the surface terrain, the lowest value is used. If either has an infiltration value of 0, water cannot infiltrate into the underground unsaturated zone.
The maximum amount of water which can be stored in the saturated zone is based on the WATER_STORAGE_PERCENTAGE of the underground terrain.
Underground flow, also known as horizontal infiltration, is also dependent on the infiltration properties of the underground, unless an aquifer exists the same location.
Notes
- Contrary to its name, the WATER_STORAGE_PERCENTAGE should always be a fraction.
- The groundwater level reduction is related inversely 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 underground layer decreases.
How-to's
See also
- Group
- Terrain attributes