Surface infiltration formula (Water Overlay): Difference between revisions
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Surface infiltration is calculated per cell. | Surface infiltration is calculated per cell. | ||
First, the infiltration capacities are calculated: | |||
: ''C<sub>water</sub> = W<sub>surface</sub>'' | : ''C<sub>water</sub> = W<sub>surface</sub>'' | ||
: ''C<sub>top</sub>'' = max( I<sub>con</sub>, I<sub>surf</sub> ) | : ''C<sub>top</sub>'' = max( I<sub>con</sub>, I<sub>surf</sub> ) | ||
Revision as of 10:06, 13 June 2019
Surface infiltration is calculated per cell.
First, the infiltration capacities are calculated:
- 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 infiltration 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.