Process representation across tools

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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 (input data, parameters, model-calculated states/storages)	Rain Cover properties: max interception	Rain Cover properties: max interception	Rain PET Canopy storage (state) Cover properties: max interception (OR LAI)	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 Canopy storage (state) Cover properties: LAI canopy interception coefficient
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 (vs surface runoff or surface storage)

Note: This excludes the case of a modelling unit (HRU, grid cell, area within a subcatchment, etc.) is designated as impervious. In this case, rain inputs would become surface runoff, potentially with a portion staying behind as surface storage if the area has attenuation specified (to represent roughness and flatness).

Algorithm description	WRSM-Pitman	SPATSIM-Pitman	ACRU4	SWAT2012	MIKE-SHE, semi-distributed, more conceptual	MIKE-SHE, fully-distributed, more physical
Algorithm inputs (input data, parameters, model-calculated states/storages)	Rain Rainfall distribution factor Soil moisture (state) Soil properties: Saturation soil moisture Infiltration rate distribution (min, max)	Rain Rainfall distribution factor Soil moisture (state) Soil properties: Saturation soil moisture Infiltration rate distribution (min, max)	Throughfall (rain-interception) Soil moisture within "infiltration depth"(state) Soil properties: Saturation soil moisture "Infiltration depth" parameter Macropore by-pass (clay cracking)	Throughfall (rain-interception) Soil moisture (state) Soil properties: Saturation soil moisture Curve number (SCS-CN) Macropore by-pass	Throughfall (rain-interception) Soil moisture (state) Soil properties: Saturation soil moisture Saturated hydraulic conductivity (Ksat), Macropore by-pass	Throughfall (rain-interception) Soil moisture (state) Soil properties: Saturation soil moisture Soil moisture retention curve Saturated hydraulic conductivity (Ksat), Macropore by-pass
Function type	non-linear & threshold	non-linear & threshold	power & threshold	power & threshold	linear (rate) & threshold	non-linear & threshold
Thresholds	yes: Saturation soil moisture, Max infiltration rate	yes: Saturation soil moisture, Max infiltration rate	yes: Saturation soil moisture	yes: Saturation soil moisture, Max infiltration rate (calculated)	yes: Saturation soil moisture, Max infiltration rate (use: Ksat)	yes: Saturation soil moisture, Max infiltration rate (calculated)