Model attributes (Subsidence Overlay): Difference between revisions

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| Due to definitions "Increase" means that the distance between the surface and this ground water level increases. The default value causes the ground water level to come closer to the surface.
| Due to definitions "Increase" means that the distance between the surface and this ground water level increases. The default value causes the ground water level to come closer to the surface.
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| [[Low passive drainage (Subsidence Overlay|LOW_PASSIVE_DRAINAGE]]
| [[Low passive drainage (Subsidence Overlay)|LOW_PASSIVE_DRAINAGE]]
| When passive drainage is applied, the GLG (lowest ground water level) is increased by this amount.
| When passive drainage is applied, the GLG (lowest ground water level) is increased by this amount.
| 0
| 0

Revision as of 12:27, 8 February 2021

The subsidence overlay also has attributes. All attributes have a default value, but can be changed to configure the subsidence calculation.

Attribute Description Default value Remark
PARAMETER_A The A parameter in the Oxidation formula. 0.023537 This value is recalculated each 1-year time step of the calculation.
PARAMETER_B The B parameter in the Oxidation formula. 0.01263
PARAMETER_C The C parameter in the Oxidation formula. 0.00668
CLIMATE_START_TEMP The average temperature in the first year of the simulation. 10.1
CLIMATE_FINAL_TEMP The average temperature in the final year of the subsidence simulation. 10.7
CLIMATE_OXIDATION The oxidation factor used to recalculate the climate values between 1-year calculation steps. 0.67
CLIMATE_SOIL_TEMP_FACTOR The soil temperature factor used to recalculate the climate values between 1-year calculation steps. 0.5
DEFAULT_CLAY_THICKNESS If no clay thickness value can be found in a particular grid cell, this value is used instead. 0.2
DEFAULT_PEAT_FRACTION If no peat fraction value can be found in a particular grid cell, this value is used instead. 0.4
DEFAULT_TOP_LAYER_THICKNESS If no top layer value can be found in a particular grid cell, this value is used instead. 5.0
HI_PASSIVE_DRAINAGE When passive drainage is applied, the GHG (highest ground water level) is increased by this amount. -0.10 Due to definitions "Increase" means that the distance between the surface and this ground water level increases. The default value causes the ground water level to come closer to the surface.
LOW_PASSIVE_DRAINAGE When passive drainage is applied, the GLG (lowest ground water level) is increased by this amount. 0 Due to definitions "Increase" means that the distance between the surface and this ground water level increases. The default value does not affect the ground water level.
YEARS The amount of years to simulate during the calculation, in 1-year steps. It's possible to set this value anywhere between 1 to 1000. 30 This attribute is linked to one of the keys of the overlay. When this attribute is changed the key is changed as well.