Surface infiltration formula (Water Overlay): Difference between revisions
Jump to navigation
Jump to search
No edit summary |
mNo edit summary |
||
| Line 18: | Line 18: | ||
* W<sub>surface</sub> = The amount of water (the water column) on the surface. | * W<sub>surface</sub> = The amount of water (the water column) on the surface. | ||
* I<sub>con</sub> = The [[ | * I<sub>con</sub> = The [[Terrain ground infiltration md (Water Overlay)|GROUND_INFILTRATION_MD]] of a construction on a specific cell (if present). | ||
* I<sub>surf</sub> = The GROUND_INFILTRATION_MD of the surface terrain type. This value should be interpreted as the vertical conductivity (Kv) of the sub-soil. | * I<sub>surf</sub> = The [[Terrain ground infiltration md (Water Overlay)|GROUND_INFILTRATION_MD]] of the surface terrain type. This value should be interpreted as the vertical conductivity (Kv) of the sub-soil. | ||
{{Template:WaterOverlay_nav}} | {{Template:WaterOverlay_nav}} | ||
Revision as of 13:46, 15 May 2019
Surface infiltration is calculated per cell.
Infiltration capacities:
- Cwater = Wsurface
- Ctop = max( Icon, Isurf )
- Isurf = 0 if a construction is present
- Icon = 0 if no construction is present
Actual infiltration:
- Δw = min( Cwater , Δt * Ctop)
Where:
- Δw = The surface infiltration which takes place.
- Δt = Computational timestep.
- Cwater = The amount of infiltration that can take place based on the amount of water on the surface.
- Ctop = The amount of evaporation that can take place based on the infiltration values present.
- Wsurface = The amount of water (the water column) on the surface.
- Icon = The GROUND_INFILTRATION_MD of a construction on a specific cell (if present).
- Isurf = The GROUND_INFILTRATION_MD of the surface terrain type. This value should be interpreted as the vertical conductivity (Kv) of the sub-soil.