Difference between revisions of "Water balance outputs across tools"

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! colspan="6" | '''Tool output and/or calculation approach'''
 
! colspan="6" | '''Tool output and/or calculation approach'''
 
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! scope="col" style="background: #F2CEE0; width:8em" |WRSM-Pitman </br>(Sami GW)
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! scope="col" style="background: #F2CEE0; width:8em" |WRSM-Pitman </br><small>(Sami GW)
! scope="col" style="background: #F2D4CE; width:8em" |SPATSIM-Pitman </br>(Hughes GW)
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! scope="col" style="background: #F2D4CE; width:8em" |SPATSIM-Pitman </br><small>(Hughes GW)
 
! scope="col" style="background: #CEF2CE; width:8em" |ACRU4
 
! scope="col" style="background: #CEF2CE; width:8em" |ACRU4
 
! scope="col" style="background: #F2F2CE; width:8em" |SWAT2012
 
! scope="col" style="background: #F2F2CE; width:8em" |SWAT2012
 
! scope="col" style="background: #CEE6F2; width:8em" |MIKE-SHE,  
 
! scope="col" style="background: #CEE6F2; width:8em" |MIKE-SHE,  
[[Coverage of structural options within modelling tools#MIKE-SHE|semi-distributed,</br>more conceptual]]
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[[Coverage of structural options within modelling tools#MIKE-SHE|<small>semi-distributed,</br>more conceptual]]
 
! scope="col" style="background: #CEDAF2; width:8em" |MIKE-SHE,  
 
! scope="col" style="background: #CEDAF2; width:8em" |MIKE-SHE,  
[[Coverage of structural options within modelling tools#MIKE-SHE|fully-distributed,</br>more physical]]
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[[Coverage of structural options within modelling tools#MIKE-SHE|<small>fully-distributed,</br>more physical]]
  
 
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Revision as of 06:50, 4 December 2023

Modelling tools differ in the hydrological processes, or water balance elements (fluxes and storages), that they calculate individually, save, and allow users to export for further analyses. The table below covers what each software tool outputs, meaning what can be saved as a timeseries of flow rates, fluxes, or storage volumes or depths, and for what spatial scale or modelled units these can be output. Output file formats are cover here.

Note: The table differentiates between the case in which a tool does not output its calculation of a certain flux or storage (Output = "no") and the case in which the tool does not explicitly model or calculate the listed process ("not modelled"). In the case when a tool does model a process, but does not output the results of this particular calculation, the user could potentially consult the tools' user guide and attempt to calculate the process themselves using the algorithm that is applied in the software and other components that can be output. In cases where a calculation would be relatively simple, and based only on other outputs covered in the table, the calculation approach has been given in the table. For cases where the tool does output a flux but uses a different name for it that has been used in the table row heading, this has been noted in brackets below. For more terminology comparison across tools, see further coverage here.

Flux or storage Tool output and/or calculation approach
WRSM-Pitman
(Sami GW)
SPATSIM-Pitman
(Hughes GW)
ACRU4 SWAT2012 MIKE-SHE,

semi-distributed,
more conceptual

MIKE-SHE,

fully-distributed,
more physical

AET total Output
no *

calculate:
precip – runoff
– Δ soil storage
– Δ GW storage
(works for long-term average, not monthly due to recharge lag)

no *

calculate:
ET output (includes canopy interception)
+ AET from GW (external calculation)

no *

calculate:
canopy evap.
+ AET from soil

no *

calculate:
AET from soil
+ AET from GW

YES YES
Scale (runoff module) (subcatchment) (HRU) (HRU) grid cell, polygon, catchment grid cell, polygon, catchment
Canopy interception evaporation Output no YES YES
not modelled
YES YES
Scale subcatchment HRU grid cell, polygon, catchment grid cell, polygon, catchment
AET from soil Output no YES YES YES YES YES
Scale subcatchment HRU HRU, subcatchment, catchment grid cell, polygon, catchment grid cell, polygon, catchment
AET from GW Output no no not modelled

(exception: riparian HRU approximation)

YES
(‘Revap’)
YES YES
Scale HRU subcatchment aquifer, catchment grid cell, polygon, catchment, (aquifer layer or all)
Runoff (RO) total Output YES YES YES YES YES YES
Scale runoff module, route (any scale) subcatchment HRU, subcatchment, catchment HRU, subcatchment, catchment river cross section river cross section
Surface runoff Output
no *

calculate:
RO total – interflow – aquifer RO

YES
no *

calculate:
“Quickflow” – “DelayedStormflow”

YES YES YES
Scale runoff module subcatchment HRU HRU, subcatchment, catchment grid cell, polygon, catchment grid cell, polygon, catchment
Interflow Output YES YES
(‘soil moisture runoff’)
YES
(‘DelayedStormflow’)
YES
(‘Lateral Q’)
YES YES
(saturated zone, upper layer)
Scale runoff module subcatchment HRU HRU, subcatchment, catchment subcatchment interflow reservoir grid cell, polygon, catchment
Aquifer to channel Output YES YES YES YES YES YES
Scale runoff module subcatchment HRU, subcatchment HRU, subcatchment, catchment subcatchment aquifer, catchment grid cell, polygon, catchment, (aquifer layer or all)
Aquifer GW flow in/out Output no YES not modelled
no *

GW can ‘leave’ catchment by recharging an inactive deep aquifer

no *

GW can ‘leave’ catchment by recharging an inactive deep aquifer or ‘dead storage’

YES
Scale subcatchment (subcatchment) (subcatchment) grid cell, polygon, catchment, (aquifer layer or all)
Soil profile storage Output YES YES YES YES YES YES
Scale runoff module subcatchment soil layer in HRU HRU, subcatchment, catchment grid cell, polygon, catchment grid cell, polygon, catchment
Aquifer storage Output YES no YES YES YES YES
Scale runoff module HRU, subcatchment HRU, subcatchment subcatchment aquifer, catchment grid cell, polygon, catchment, (aquifer layer or all)
Percolation out of soil storage Output YES
(‘total recharge’)
YES
(same as recharge)
YES
(same as recharge)
YES YES YES
Scale runoff module subcatchment HRU HRU, subcatchment grid cell, polygon, catchment grid cell, polygon, catchment
Aquifer recharge Output YES
(‘aquifer recharge’)
YES YES
(B-horizon soil ‘SaturatedFlow’ + ‘UnsaturatedFlow’)
YES YES YES
Scale runoff module subcatchment HRU, subcatchment HRU, subcatchment subcatchment aquifer, catchment grid cell, polygon, catchment, (aquifer layer or all)