Helpful Hints for InputtingData into SUFI-2

for Autocalibration in SWAT-CUP4

Number of simulations to perform

Number of parameters to calibrate

Parameter Input Window

See Absolute_SWAT_ValuesFile for potential range in parameters selected for calibration

Select Rch tab for calibration of parameters based on channel reach

Number of parameters to calibrate

File.Cio Input Window

Select number of years of simulation, including warm-up period

Select beginning year of simulation

Set IPRINT = 0 for monthly, 1 for daily, and 2 for yearlycalibration

Set ICLB = 0

File.Cio Input Window

Set NYSKIP equal to the number of years used for model warm-up

Observed Reach Input Window

Observed data to calibrate output from reach file reach file may be constructed from a three column Excel spreadsheet; Information listed in the second column can be arbitrarily chosen

• FLOW_OUT_10 : this is the name of the variable and the subbasin number to be included in the objective function• 18 : number of data points for this variable as it follows below. • First column is a sequential number from beginning of the simulation, second column is variable name and date (format • arbitrary), third column is variable value.• • 1 FLOW_OUT_1_1972 0.1237• 2 FLOW_OUT_2_1972 0.1719 • 3 FLOW_OUT_3_1972 0.1538• 4 FLOW_OUT_4_1972 0.1168• 5 FLOW_OUT_5_1972 1.3576• 8 FLOW_OUT_8_1972 0.1631• 9 FLOW_OUT_9_1972 0.0790• 10 FLOW_OUT_10_1972 0.0839• 11 FLOW_OUT_11_1972 0.0726• 12 FLOW_OUT_12_1972 0.0603• 13 FLOW_OUT_1_1973 0.0816• 14 FLOW_OUT_2_1973 0.0755• 15 FLOW_OUT_3_1973 0.2749• 16 FLOW_OUT_4_1973 0.9775• 17 FLOW_OUT_5_1973 0.3292• 18 FLOW_OUT_6_1973 0.6111• 19 FLOW_OUT_7_1973 0.2220• 20 FLOW_OUT_8_1973 0.2679

Observed Reach Input Window

Extraction Reach Definition Window

Specify beginning and ending years of the simulation, without the warm-up years

Set time step = 1 for daily, 2 for monthly, or 3 for yearly calibration