Culvert (Water Overlay)

Culverts are effectively tunnels or pipes directly connecting two bodies of water, and allow water to flow in either direction. Culverts can also be used to model tunnels on land, creating a hole which water can flow through when it is flowing over land. The throughput of a culvert is limited by its dimensions.

Culverts are assumed to have a spherical cross-section.

A culvert is a line-based construction.

Icon	Attribute	Unit	Description	Default
	CULVERT_DIAMETER	m	The diameter of the culvert. For throughput calculations, the culvert is assumed to have a spherical cross-section.	1
	CULVERT_HEIGHT	m + datum	The height of the inner side of the culvert's underside (or the threshold height at which water starts flowing through the culvert). When set to a level below the terrain height at either its upstream or downstream end, the culvert's height will automatically attain a value equal to that of the highest terrain found at either of its endpoints.	0
	CULVERT_N	manning value	The manning value of the culvert's material, which influences the flow speed.	0,014

See also

• Culvert formula

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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