Water balance outputs across tools
| Flux or storage | Tool output and/or calculation approach | ||||||
|---|---|---|---|---|---|---|---|
| WRSM
(Sami GW) |
SPATSIM
(Hughes GW) |
ACRU
(ACRU4) |
SWAT
(ArcSWAT2012) |
MIKE-SHE
semi-distributed |
MIKE-SHE
fully distributed | ||
| AET total | Output | no*
calculate: (long term average, not monthly due to lags): precip. - runoff – Δ soil storage - Δ GW storage |
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 | no | 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
calculate: algorithm |
no | yes
(‘Revap’) |
yes | yes |
| Scale | (subcatchment) | 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 | no | no | no | yes |
| Scale | subcatchment | grid cell,
polygon, catchment | |||||
| 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 | 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, catchment |
grid cell,
polygon, catchment |
grid cell,
polygon, catchment | |
| Aquifer recharge | Output | yes
(‘aquifer recharge’) |
yes | yes
( ‘SaturatedFlow’ B horizon + ‘UnsaturatedFlow’ if option to include is selected) |
yes | yes | yes |
| Scale | runoff module | subcatchment | HRU | HRU,
subcatchment |
subcatchment aquifer, catchment | grid cell,
polygon, catchment, (aquifer layer or all) | |