Terrain (Subsidence Overlay)
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Terrains in a project have a number of properties which can influence the subsidence calculation. The subsidence model only takes properties of underground terrains into account. By default each location in the project area is covered by an underground terrain, and therefore each grid cell of the subsidence model can be given default values for the subsidence keys listed below. The subsidence terrain keys can all be overridden by overlapping Subsidence areas.
| Icon | Key | Unit | Range | Description | Default value |
|---|---|---|---|---|---|
 |
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 | |
 |
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 |
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