Breach coefficient (Water Overlay)

Icon	Key	Unit	Range	Description	Default value
	BREACH_COEFFICIENT	coefficient		The flow coefficient related to the shape of the breach.	1.37

Shapes

Icon	Shape	Coefficient
	Flat top	0,865
	Flat top, rounded corners	0,91
	Sharp top	1,1
	Gentle slope, one-sided	1,3
	Gentle slope, two-sided	1,37

See also

• Breach flow formula (Water Overlay)

---

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