Groundwater level formula (Water Overlay): Difference between revisions

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Where:
Where:
* WL<sub>underground</sub> = The groundwater level, relative to [[Datum|datum]]. Also known as the watertable.
* WL<sub>underground</sub> = The groundwater level, relative to {{datum}}. Also known as the watertable.
* WH<sub>underground</sub> = The height (column) of the saturated zone.
* WH<sub>underground</sub> = The height (column) of the saturated zone.


* W<sub>sat</sub> = 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.
* W<sub>sat</sub> = 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<sub>surface</sub> = The [[terrain height (Water Overlay)|surface height]] in the cell, relative to datum.
* H<sub>surface</sub> = The [[terrain height (Water Overlay)|surface height]] in the cell, relative to {{datum}}.
* GBDM = The [[Ground bottom distance m model attribute (Water Overlay)|GROUND_BOTTOM_DISTANCE_M]] (effectively available height in the underground model).
* GBDM = The [[Ground bottom distance m model attribute (Water Overlay)|GROUND_BOTTOM_DISTANCE_M]] (effectively available height in the underground model).
* WSP = The [[Terrain water storage percentage (Water Overlay)|WATER_STORAGE_PERCENTAGE]] of the underground terrain type.
* WSP = The [[Terrain water storage percentage (Water Overlay)|WATER_STORAGE_PERCENTAGE]] of the underground terrain type.

Revision as of 08:14, 14 June 2019

Groundwater level is calculated per cell.

WHunderground = Wsat / WSP
WLunderground = WHunderground + Hsurface - GBDM

Where:

  • WLunderground = The groundwater level, relative to datum. Also known as the watertable.
  • WHunderground = The height (column) of the saturated zone.
  • Wsat = 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.
  • Hsurface = 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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