Soil

The site class stores soil characteristics for a variable number of soil strata. Each stratum may be subdivided into one or more soil layers, all of which share the same set of parameters (e.g., pH, wilting point).

• Predefined types – Humus and mineral‑soil types provide default values. If a parameter is missing (identified by the nodata flag), the model automatically substitutes the corresponding default.
• Required ancillary data:
  • Land‑use history must be supplied to improve the initialisation of the ecosystem state.
  • Hydraulic conductivity directly below the bottom soil layer can be defined (e.g., in order to seal the bottom sksbottom: 0.0)

soil profile

Humustypes

Soiltypes

• Predefined types – Humus and mineral‑soil types provide default values. If a parameter is missing (identified by the nodata flag), the model automatically substitutes the corresponding default.
• Required ancillary data – Land‑use history must be supplied to improve the initialisation of the ecosystem state.
• Stone content – All bulk‑soil inputs (e.g., bulk density, field capcity,...) must refer to soil excluding stones/rocks.

Note

• Hydrologic parameters – Ensure that the values for field capacity,
  wilting point**, and the van Genuchten parameters describing the soil‑matrix
  potential are internally consistent.
• Missing split argument – If a stratum is not explicitly divided into individual soil layers, the model inserts a depth‑dependent default layer thickness to guarantee a valid discretisation.
• Stone content – All bulk‑soil inputs (e.g., bulk density, field capcity,...) must refer to soil excluding stones/rocks.

Humusparameters

Soilparameters