Ground water (Water Overlay)

The ground water mode can be configured in the Rain event step of a Water Overlay wizard.

Icon	Attribute	Unit	Range	Description	Default value
	GROUND_WATER	nominal value		Whether and how water in the ground is simulated during the calculation.	Infiltration Only

0.	None: No infiltration, no groundwater flow, no ground evaporation.
1.	Complete: Full groundwater simulation, including infiltration, flow, and evaporation
2.	Infiltration only: Water can Infiltrate into the unsaturated zone only, but no further ground flow or ground evaporation is simulated. The unsaturated zone can be simulated to have finite capacity defined by the max infiltration parameter.

Notes

• Groundwater Overlays have the ground model active by default. The other Water Overlay variants have the ground model set to infiltration only. This is a recommended setting, trading in an imperceptible amount of accuracy for a more performant calculation setup.
• This setting does not affect water flowing in- and out of the sewer.

How-to's

• How to add and remove an Attribute

See also

• Ground model (Water Overlay)
• Infiltration model (Water Overlay)
• Surface water (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

Limit area • Limit rain • Max infiltration m • Max water bottom m • Microrelief storage fraction • Min max elevation • Object entry correction • Prequel surface level relative • Rise rate distance m • Sewer overflow threshold • Shoreline • Show duration flood level m • Stabilizer angle • Start date ms • Surface water • Surface water evaporation factor • Timeframe times • Timeframes • Unsaturated fraction • Weir dam multiplier • Weir move interval s • Weir move range m • Weir move step m

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Building attributes • Hydrological features • Hydraulic structures •  Terrain attributes • Results • Simulation data