Drainage overflow threshold (Water Overlay)

Icon	Key	Unit	Range	Description	Default value
	DRAINAGE_OVERFLOW_THRESHOLD	m + datum		The threshold of the water end-point of the drainage.	n/a

When the drainage is configured to be active drainage, water is pumped from the underground to the waterway until the water level in the waterway has reached the configured threshold.

This attribute can be defined as values over time, using an array of values defining interpolation-time. This allows users to more dynamically define the target water level this drainage system maintains.

Notes

• When the drainage is not configured as active drainage (and thus behaves as passive drainage), the drainage threshold is ignored.
• A drainage threshold is only taken into consideration if the Attribute is explicitly defined.
• If no DRAINAGE_DATUM attribute is defined, a threshold must be defined, otherwise the assumed low positioning of the drainage will prohibit surface water from flowing in or out.

See also

• Drainage active (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