Surface infiltration formula (Water Overlay): Difference between revisions

Revision as of 08:01, 17 October 2019

Surface infiltration is calculated per cell.

First, the infiltration capacities are calculated:

$C_{water}=W_{surface}$

$C_{top}=max(I_{con},I_{surf})$

$I_{surf}=0$ if a construction is present

$I_{con}=0$ if no construction is present

Then the actual infiltration:

$\Delta w=min(C_{water},\Delta t\cdot C_{top})$

Where:

$C_{water}$ = The amount of infiltration that can take place based on the amount of water on the surface.
$C_{top}$ = The amount of infiltration that can take place based on the infiltration values present.

$W_{surface}$ = The amount of water (the water column) on the surface.
$I_{con}$ = The GROUND_INFILTRATION_MD of a construction on a specific cell (if present).
$I_{surf}$ = The GROUND_INFILTRATION_MD of the surface terrain type. This value should be interpreted as the vertical conductivity (Kv) of the sub-soil.

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	First, the infiltration capacities are calculated:		First, the infiltration capacities are calculated:

	<math>C_{water} = W_{surface}</math>		<math>C_{water} = W_{surface}</math>