Groundwater level formula (Water Overlay)

Groundwater level is calculated per cell.

WH_underground = W_sat / WSP

WL_underground = WH_underground + H_surface - GBDM

Where:

• WL_underground = The groundwater level, relative to datum.
• 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 terrain 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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