Weir coefficient (Water Overlay)

Icon	Key	Unit	Range	Description	Default value
	WEIR_COEFFICIENT	coefficient		The flow coefficient related to the shape of the weir.	1,1

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

• Weir formula (Water Overlay).

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Water Module

Water Module

Tutorials

Overview

Theory

Benchmarks

Group

Hydraulic structures

Inlet

Inlet q • Inlet area • Inlet capacity •  Lower threshold •  Upper threshold • Inlet underground

Pump

Pump q •  Lower threshold •  Upper threshold • Pump angle • Pump capacity • Pump area

Culvert

Culvert diameter • Culvert rectangular height • Culvert threshold • Culvert n

Weir

Weir height • Weir width • Weir angle • Weir coefficient • Weir target level

Sewer overflow

Sewer overflow • Sewer overflow speed

Drainage

Drainage q • Drainage datum • Drainage active • Drainage overflow threshold

Output

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

Related

Building attributes • Hydrological features •  Terrain attributes • Model attributes • Results • Simulation data