External surface level (Water Overlay)

Icon	Key	Unit	Range	Description	Default value
	EXTERNAL_SURFACE_LEVEL	m + datum	-10000 to 10000	The height of the bottom of the external water body behind the breach. The lowest level the external water level can lower to.	0

Notes

• When a breach input area is defined, an external water body will not be created. Subsequently, the EXTERNAL_SURFACE_LEVEL, EXTERNAL_WATER_LEVEL and EXTERNAL_AREA attributes will be ignored.

How-to's

• How to add a breach with external area manually

See also

• Breach growth formula
• Breach flow formula
• Weir formula
• Breach model (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 water area output • Object width output

Related

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