Culvert threshold (Water Overlay)

Icon	Key	Unit	Range	Description	Default value
	CULVERT_THRESHOLD	m + datum	-10000 to 10000	The height of the inner side of the culvert's underside (or the threshold height at which water starts flowing through the culvert). Each end-point of a culvert will be put on the threshold height or the terrain height at that end-point, whichever value is the highest.	-10000

Culvert with end-points at different heights (29 m and -1 m), also indicated by OBJECT_WATER_AREA_OUTPUT.

Notes

• By default, since the default value is the minimal surface value, each end-point of a culvert is put on the bottom of the waterway at that end-point, determined by terrain height.
• The height at which the end-point of a culvert is situated is stored as the 5th and 6th value of the OBJECT_WATER_AREA_OUTPUT array.

See also

• Culvert formula (Water Overlay)
• Object water area output (Water Overlay)

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Water Module

Water Module

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Overview

Theory

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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