Condition variable
The following condition variables are currently coded in SWAT+. If a condition field is not listed in 'Additional fields used', you may leave it as null if field type is string or 0.0000 if field type is double/real.
| Condition variable | Description | Additional fields used | Comments |
|---|---|---|---|
w_stress
Water stress of the plant(s)
If more than one plant is growing, the average stress will be used
n_stress
Nitrogen stress of the plant(s)
If more than one plant is growing, the average stress will be used
p_stress
Phosphorus stress of the plant(s)
If more than one plant is growing, the average stress will be used
phu_plant
Plant Heat Units since start of plant growth
If more than one plant is growing, the Heat Units for the first one will be used
phu_base0
Heat Units since January 1 with a base temperature of 0 deg C
precip_cur
Precipitation on the current day
precip_next
Precipitation on the next day
plant_gro
Plant growing
plant_name_gro
Specific plant growing
days_plant
Days since last planting
days_harv
Days since last harvest
days_irr
Days since last irrigation
days_act
Days since last action
day_start
Days since first simulation day of the year
slope
Slope of the HRU
soil_water
Total soil water in the soil profile
jday
Julian day
month
Month
year_rot
Rotation year
year_gro
Growth year of perennials
year_cal
Calendar year
year_seq
Sequential year of simulation
cur_yrs_mat
Current years of maturity for perennial plants
biomass
Above-ground biomass
leaf_area
Leaf Area Index
gound_cov
Total ground cover (above-ground biomass and surface residue)
p_factor
USLE conservation practice factor
k_factor
USLE soil erodibility factor
hyd_soil_group
Hydrologic Soil Group
p_pet
Precipitation/PET ratio
p_lab_150
Soil labile phosphorus of first layer
soil_temp2
Soil temperature of second layer
soil_carbon
Soil organic carbon of first layer
tile_drained
The HRU is tile-drained
prob
Probability
prob_unif
Probability within a defined period assuming uniform distribution
channel_flo
Channel flow
tile_flo
Tile flow
irr_demand
Irrigation demand
aqu_dep
Aquifer depth below soil surface
land_use
Land use and management
tillage
Tillage system (name of tillage decision table)
plant_com
Plant is in the community
ch_order
Channel order
vol
Reservoir volume
res_inflo
Reservoir inflow
wet_depth
Average depth of water on an impounded HRU (paddy)
weirh
Paddy weir height
vol_wet
Volume of water stored in a wetland