Difference between revisions of "Process representation across tools"

From Hydromodel SA Wiki
Jump to navigation Jump to search
Line 74: Line 74:
 
</br>
 
</br>
  
−
== Infiltration into soil moisture (SM) ==
+
== 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).
 
{| class="wikitable"
 
{| class="wikitable"
 
! scope="col" style="width:10%" | Algorithm <br/>description
 
! scope="col" style="width:10%" | Algorithm <br/>description
Line 81: Line 82:
 
! scope="col" style="background: #CEF2CE; width:15%" |ACRU4
 
! scope="col" style="background: #CEF2CE; width:15%" |ACRU4
 
! scope="col" style="background: #F2F2CE; width:15%" |SWAT2012
 
! scope="col" style="background: #F2F2CE; width:15%" |SWAT2012
−
! scope="col" style="background: #CEE6F2; width:15%" |MIKE-SHE,</br>[[Coverage of structural options within modelling tools#MIKE-SHE|semi-distributed, more conceptual]]
+
! scope="col" style="background: #CEE6F2; width:15%" |MIKE-SHE,</br>[[Coverage of structural options within modelling tools#MIKE-SHE|semi-distributed, </br>more conceptual]]
−
! scope="col" style="background: #CEDAF2; width:15%" |MIKE-SHE,</br>[[Coverage of structural options within modelling tools#MIKE-SHE|fully-distributed, more physical]]
+
! scope="col" style="background: #CEDAF2; width:15%" |MIKE-SHE,</br>[[Coverage of structural options within modelling tools#MIKE-SHE|fully-distributed, </br>more physical]]
 
|-
 
|-
 
| style="vertical-align: top" |<br/>'''Algorithm <br/>inputs''' <br/>''(input data,<br/>parameters,<br/>model-calculated<br/>states/storages)''
 
| style="vertical-align: top" |<br/>'''Algorithm <br/>inputs''' <br/>''(input data,<br/>parameters,<br/>model-calculated<br/>states/storages)''

Revision as of 13:44, 24 November 2023

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
(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)


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

Retrieved from "https://hydromodel-sa-wiki.saeon.ac.za/index.php?title=Process_representation_across_tools&oldid=631"