Unsaturated fraction (Water Overlay)

Icon	Attribute	Unit	Range	Description	Default value
	UNSATURATED_FRACTION	fraction		The initial fraction of the maximum storage capacity of the unsaturated zone which is filled with water.	0

Notes

• The maximum storage capacity of underground terrains can be configured with the Water storage percentage attribute.
• Note that this fraction is relative to the maximum water storage capacity of the terrain and not relative to the underground terrain volume.
  • Underground terrain volume this fraction applies to does not include the underground height of the saturated zone. Only the underground which is not saturated is taken into account for the unsaturated zone.
  • This amounts to the following formula: Amount of water in the unsaturated zone = ground water depth * WATER_STORAGE_PERCENTAGE * UNSATURATED_FRACTION.
  • For example, an underground terrain with a water storage of 25% and a ground water depth of 1 m and a configured unsaturated fraction of 0.25 will result in 0.0625 meter water in the unsaturated zone. (25% of 25% of the total volume of 1 m3)

How-to's

• How to add and remove an Attribute

See also

• Unsaturated fraction prequel (Water Overlay)
• Water storage percentage (Water Overlay)

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Allowed water increase m • Avg shore width m • Avg terrain width m • Avg terrain storage m • Breach measurement distance m • Bridge elevation • Culvert dem threshold m • Design flood elevation m • Extended reconstruction • Ground bottom distance m • Ground bottom pressure m • Ground water • Ground water depth m • Ground watertable with surface • Impact flood threshold m • Impact range m • Increased resolution • Infiltration factor s

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