Groundwater level formula (Water Overlay)

Groundwater level is calculated per cell.

WH_{underground}={\frac {W_{sat}}{WSP}}

WL_{underground}=WH_{underground}+H_{surface}-GBDM

Where:

$WL_{underground}$ = The groundwater level, relative to datum. Also known as the watertable.
$WH_{underground}$ = The height (column) of the saturated zone.

$W_{sat}$ = The amount of water in the saturated zone. The height of the water column if the equivalent amount of water was placed on the surface.
$H_{surface}$ = The surface height in the cell, relative to datum.
$GBDM$ = The GROUND_BOTTOM_DISTANCE_M (effectively available height in the underground model).
$WSP$ = The WATER_STORAGE_PERCENTAGE of the underground terrain type.

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Water Module

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