Surface infiltration formula (Water Overlay): Difference between revisions

Revision as of 07:58, 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.

@@ Line 3: / Line 3: @@
 First, the infiltration capacities are calculated:
 : ''C<sub>water</sub> = W<sub>surface</sub>''
-: ''C<sub>top</sub>'' = max( I<sub>con</sub>, I<sub>surf</sub> )
+<math>C_{top} = max( I_{con}, I_{surf})</math>
-:: I<sub>surf</sub> = 0 if a construction is present
+<math>I_{surf} = 0</math> if a construction is present
-:: I<sub>con</sub> = 0 if no construction is present
+<math>I_{con} = 0</math> if no construction is present
 Then the actual infiltration:
 <math>\Delta w = min( C_{water}, \Delta t \cdot C_{top})</math>