Roughness

Value

Meaning

Parameters

The value is specified by the parameter RoughLength given in a table (Evapotranspiration – single canopy)

Driving variable

The roughness length is defined as a driving variable in the PLANT driving variable file. The roughness length, z0, is defined by the name ROUGH in the identification field of the PG-variable.

f(canopy)

The roughness length, z0, is calculated according to the function derived from Shaw and Pereira (1982) (see Evapotranspiration – single canopy or Evapotranspiration - multiple canopies).