Subsidence area (Subsidence Overlay)

Subsidence areas are conceptual areas which allow users to override subsidence related attributes of the underlying terrain.

Icon	Key	Unit	Range	Description	Default value
	SUBSIDENCE	boolean		Whether or not subsidence should be calculated for a terrain or in a given area. Subsidence is calculated when the value is not equal to 0.	false
	CLAY_THICKNESS	m		The thickness of the clay layer on the peat, for the calculation of the oxidation component of subsidence.	0.2
	PEAT_FRACTION			The fraction of the soil composed of peat, for the calculation of the compaction component of subsidence.	0.4
	TOPLAYER_THICKNESS	m		The thickness of the layer covering the peat, for the calculation of the compaction component of subsidence.	1.2

Notes

• Clay thickness defined in a Subsidence area is ignored when a clay thickness geotiff is used.

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Subsidence Module

Subsidence Overlay

Tutorials

Overview

Theory

Benchmarks

Group

Subsidence features

Model

Overview • Calculation • Theory

Water area

Water level • Water level output • Indexation

Ground water level

Hi ground water level • Low ground water level

Subsidence area

Peat fraction • Clay thickness • Toplayer thickness • Subsidence

Terrain

Peat fraction • Clay thickness • Toplayer thickness • Subsidence

Drainage

Drainage

Related

Model attributes • Rasters • Result type •  Subsidence Model