Process representation across tools

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PAGE IN PROGRESS - MORE COMING SOON!

building process representation overview tables + links to more specific pages about individual processes

Canopy interception and evaporation vs throughfall

Algorithm description WRSM-Pitman SPATSIM-Pitman ACRU4 SWAT2012 MIKE-SHE, semi-distributed & fully distributed
Algorithm inputs
  • Rain
  • Cover properties: max interception
  • Rain
  • Cover properties: max interception
  • Rain
  • PET
  • Cover properties: max interception or LAI
  • Canopy storage (state)

Canopy interception is not explicitly modelled when using daily timestep modelling.
It is implicitly considered in the ‘initial abstraction’, see infiltration & surface runoff below

  • Rain
  • PET
  • Cover properties: LAI & canopy interception coefficient
  • Canopy storage (state)
Function type exponential & threshold exponential & threshold threshold threshold
Thresholds

yes:
timestep interception capacity (calculated)

yes:
timestep interception capacity (calculated)

yes:
timestep interception capacity (calculated)

yes:
timestep interception capacity (calculated)

Infiltration into soil moisture (SM)

Surface water generation of landscape units

Surface runoff to channel network

Evapotranspiration (ET) from soil moisture (SM)

Evapotranspiration (ET) from groundwater (GW)

Interflow generation & routing to channel network

Aquifer recharge

Groundwater (GW) flow

Aquifer exchange with channel: aquifer outflow or channel transmission losses

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