Inundation area (Water Overlay)

An inundation area is an initial placement of a quantity of water. This differs from the water areas in that an inundation level allows you to place water anywhere on the surface (but explicitly not on water).

Inundation areas can be used for simulations of situations where an area is already seriously flooded, or where an area of land which is set up to be used as a water buffer or emergency water retention has already filled up.

Icon	Key	Unit	Range	Description	Default value
	INUNDATION_LEVEL	m + datum		The height of the water on non-water surface terrains.	n/a

Notes

• If a grid cell is not covered by an inundation area or if the cell is marked as water, the grid cell will not be inundated by the inundation level area.
• For terrain with a steep decline, using a single inundation area to define the inundation level might not suffice, since the level is a datum height, not a relative offset from the bottom. Alternatives, such as staggered inundation areas, or initializing the waterway dry, should be considered.

See also

• Water area (Water Overlay)
• Surface model (Water Overlay)
• Surface water level formula (Water Overlay)

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Water Module

Water Module

Tutorials

Overview

Theory

Benchmarks

Group

Hydrological features

Water area

Water level • Water relative

Sewer area

Sewer storage • Sewer pump speed

Inundation area

Inundation level

Aquifer

Aquifer kd • Aquifer datum

Breach

Breach height • Breach width • Breach angle • Breach coefficient • Breach speed • Breach input area • Breach level area • External surface level • External water level • External area

Rain area

Rain m

Limitation area

Limit area

Output

Object flow output • Object height output • Object datum output a • Object datum output b • Object width output

Related

Building attributes • Hydraulic structures •  Terrain attributes • Model attributes • Results • Simulation data