Min unsaturated fraction prequel (Water Overlay)

Name	Prequel	Underlying data	Unit	Range	No data	Description
Min Unsaturated fraction	MIN_UNSATURATED_FRACTION	Water Prequel		0 to 1	Clamped to range	Used for initializing the minimal resquested saturation of the unsaturated zone in the underground.

Notes

• The values in this prequel grid are clamped between 0 and 1. No data values are not allowed, but negative values are interpreted as zero saturation.
• Note that this fraction is relative to the maximum water storage capacity of the terrain and not relative to the underground terrain volume. This amounts to the following formula:
  Minimal requested amount of water in the unsaturated zone = relative ground water depth * WATER_STORAGE_PERCENTAGE * MIN_UNSATURATED_FRACTION.

See also

• Min unsaturated fraction (Terrain Attribute)
• Terrain water storage percentage (Water Overlay)

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