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HRU-lte drainage area
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Time of concentration
Soil profile depth
Soil percolation coefficient
Land surface slope
Land surface slope length
ET coefficient
Specific yield of the shallow aquifer
Baseflow alpha factor
Revap coefficient
Percolation coefficient from shallow to deep aquifer
Initial soil water (fraction of available water capacity)
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Initial shallow aquifer flow
Initial deep aquifer flow
Initial snow water equivalent
Latitude
Soil texture
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USLE cover factor C
USLE support practice factor P
USLE slope length and slope factor LS
If regular HRUs are used in a SWAT+ setup, there is one main file, hru-data.hru, which references several other files specifying the HRU properties. The properties of HRU-lte objects are defined in hru-lte.hru.
Name of the HRU
The SWAT+ Editor assigns a name to every object, which is typically the abbreviation of the object type followed by the object number in QSWAT+. However, the name of the HRU is not used by SWAT+, so the user may change it.
This file contains pointers to several files that specify the HRU properties.
| Field | Description | Type |
|---|---|---|
Pointer to the hydrology file
The pointer to the hydrology file is a foreign key referencing in .
ID of the HRU
integer
Name the of HRU
string
Pointer to the topography file
string
Pointer to the hydrology file
string
Pointer to the soil file
string
Pointer to the land use and management file
string
Pointer to the soil and plant initialization file
string
Pointer to the wetland file
string
Pointer to the snow file
string
Pointer to the field file
string
Pointer to the soil and plant initialization file
The pointer to the soil and plant initialization file is a foreign key referencing in .
Pointer to the topography file
The pointer to the topography file is a foreign key referencing name in topography.hyd.
Pointer to the land use and management file
The pointer to the land use and management file is a foreign key referencing name in landuse.lum.
Pointer to the wetland file
The pointer to the wetland file is a foreign key referencing in .
| Field | Description | Type | Unit | Default | Range |
|---|---|---|---|---|---|
ID of the HRU-lte
integer
n/a
Name of HRU-lte
string
n/a
n/a
n/a
HRU-lte drainage area
real
km^2
0.0
Condition II Curve Number
real
none
80.0
Soil water factor for CN3
real
none
1.0
Time of concentration
real
min
26.0
Soil profile depth
real
mm
1500.0
Soil percolation coefficient
real
none
0.0
0.0-6000.0
Land surface slope
real
m/m
0.04
0.0-0.60
Land surface slope length
real
m
64.20
ET coefficient
real
none
Specific yield of the shallow aquifer
real
mm
0.05
Baseflow alpha factor
real
0.05
Revap coefficient
real
none
0.0
Percolation coefficient from shallow to deep aquifer
real
none
0.01
Initial soil water (fraction of available water capacity)
real
fraction
0.50
0.0-1.0
Initial shallow aquifer storage
real
mm
3.00
Initial shallow aquifer flow
real
mm
0.0
Initial deep aquifer flow
real
mm
300.0
Initial snow water equivalent
real
mm
0.0
Latitude
real
31.60
Soil texture
string
n/a
n/a
n/a
Tropical flag
string
n/a
non_trop
n/a
Start of growing season for non-tropical/start of monsoon initialization period for tropical
string
n/a
n/a
n/a
End of growing season for non-tropical/start of monsoon initialization period for tropical
string
n/a
n/a
n/a
Plant type
string
n/a
agrl
n/a
Plant stress
real
fraction
1
0.0-1.0
Potential ET method
string
n/a
harg
n/a
Irrigation code
string
n/a
no_irr
n/a
Irrigation source
string
n/a
outside_bsn
n/a
Design subsurface tile drain time
real
hr
0.0
USLE soil erodibility factor K
real
n/a
0.32
USLE cover factor C
real
n/a
0.20
USLE support practice factor P
real
n/a
0.80
USLE slope length and slope factor LS
real
n/a
0.53
Name of HRU-lte
Condition II Curve Number
Soil water factor for CN3
0 = field capacity
1 = saturation
ID of the HRU-lte
The ID of the HRU-lte is a primary key referenced by hlt in hru-lte.con. All IDs in the hru-lte.hru file must be unique.
Initial shallow aquifer storage
Tropical flag
0 = non-tropical
1 = tropical
Start of growing season for non-tropical/start of monsoon initialization period for tropical
points to lum_std.dtbl file
Potential ET method
SWAT+ offers two options for estimating PET for HRU-lte:
p_t - Priestley-Taylor method
harg - Hargreaves method
Plant stress
pest, root, restriction, soil quality
Plant type
End of growing season for non-tropical/start of monsoon initialization period for tropical
points to lum_std.dtbl file
Design subsurface tile drain time
Irrigation source
outside_bsn - outside basin
shal_aqu - shallow aquifer
deep_aqu - deep aquifer
USLE soil erodibility factor K
Irrigation code
no_irr - no irrigation
irr - irrigation