Weir coefficient (Water Overlay)

Icon	Key	Unit	Range	Description	Default value
	WEIR_COEFFICIENT	coefficient	0 to 10000	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 n • 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 water area output • Object width output • Weir dam output

Related

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