Parameter a recalculation formula (Subsidence Overlay): Difference between revisions

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* <math>a_{y}</math> = The a parameter for the current year.
* <math>a_{y}</math> = The a parameter for the current year.
* <math>a_{0}</math> = The defined a parameter to start the calculation with.
* <math>a_{0}</math> = The a parameter value at the start of the calculation, defined by [[Parameter a (Subsidence Overlay)|Parameter a]].
* <math>T_{y}</math> = The interpolated average temperature for the calculation in the current year.
* <math>T_{y}</math> = The interpolated average temperature for the calculation in the current year.
* <math>y_{y}</math> = The current year.
* <math>y_{y}</math> = The current year.

Revision as of 15:23, 8 February 2021

The a parameter is recalculated yearly, to account for a changing climate. The new value for the a parameter is obtained by multiplying the original Parameter a is with a factor. This factor is calculated based on an interpolated average temperature for that year, a soil temperature factor, micro activity and an oxidation factor.

The value of the a parameter is updated each year as follows:

Delta temperature is calculated as:

Delta micro activity is calculated as:

Delta subsidence is calculated as:

The new parameter a value for year y is calculated as:

  • = The a parameter for the current year.
  • = The a parameter value at the start of the calculation, defined by Parameter a.
  • = The interpolated average temperature for the calculation in the current year.
  • = The current year.
  • = The start year of the simulation, defined by CLIMATE_START_YEAR.
  • = The final year of the simulation, defined by the addition of the start year and YEARS.
  • = The average temperature of the start year, defined by CLIMATE_START_TEMP.
  • = The average temperature of the final year, defined by CLIMATE_FINAL_TEMP.
  • = The Q10 factor, configured as 3. This value is currently not adjustable
  • = The interpolated average temperature for the calculation in the current year.
  • = Soil temperature factor, defined by CLIMATE_SOIL_TEMP_FACTOR.
  • = Oxidation factor, defined by CLIMATE_OXIDATION.


Subsidence Module
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Subsidence Overlay
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Tutorials
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Overview
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Theory
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Benchmarks
Group
Model
Overview • Calculation • Theory
Formulas
Parameter a recalculation • Ground water depth • Oxidation • Compaction • Subsidence • Indexation
Related
Features • Model attributes • Rasters • Result type


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