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Table 1

Calibrated values of parameters used during the SWAT model calibration

ParameterDefinitionUnitsRangeaCalibrated value
FOREST Pervious land fraction covered by forest – 0–1 0–1 
LZSN Lower zone nominal storage Mm 50.8–381 25.4–381 
UZSN Upper zone nominal storage mm 0.25–50.8 1.27–50.8 
INFILT Index to infiltration capacity mm/h 0.25–25.0 0.5–25.0 
BASETP Fraction of potential evapotranspiration from base flow – 0.0–0.2 0.01–0.05 
AGWETP Fraction of remaining evapotranspiration from active groundwater – 0.0–0.2 0.0–0.1 
INTFW Interflow inflow parameter – 1.0–10.0 3.0 
IRC Interflow recession parameter – 0.3–0.85 0.3–0.7 
AGWRC Groundwater recession parameter, – 0.920–0.999 0.920–0.999 
DEEPFR Fraction of groundwater inflow that goes to inactive groundwater – 0.0–0.5 0.0–0.5 
CEPSC Interception storage capacity mm 0.0–10.2 0.1 
KVARY Variable groundwater recession 1/mm 0.0–127.0 0.0–80.3 
LSUR Length of overland flow 30.5–213.4 45.7–106.7 
ParameterDefinitionUnitsRangeaCalibrated value
FOREST Pervious land fraction covered by forest – 0–1 0–1 
LZSN Lower zone nominal storage Mm 50.8–381 25.4–381 
UZSN Upper zone nominal storage mm 0.25–50.8 1.27–50.8 
INFILT Index to infiltration capacity mm/h 0.25–25.0 0.5–25.0 
BASETP Fraction of potential evapotranspiration from base flow – 0.0–0.2 0.01–0.05 
AGWETP Fraction of remaining evapotranspiration from active groundwater – 0.0–0.2 0.0–0.1 
INTFW Interflow inflow parameter – 1.0–10.0 3.0 
IRC Interflow recession parameter – 0.3–0.85 0.3–0.7 
AGWRC Groundwater recession parameter, – 0.920–0.999 0.920–0.999 
DEEPFR Fraction of groundwater inflow that goes to inactive groundwater – 0.0–0.5 0.0–0.5 
CEPSC Interception storage capacity mm 0.0–10.2 0.1 
KVARY Variable groundwater recession 1/mm 0.0–127.0 0.0–80.3 
LSUR Length of overland flow 30.5–213.4 45.7–106.7 

aRange of possible values for each model parameter (USEPA 2000; Kim et al. 2007; Diaz-Ramirez et al. 2011; Luo et al. 2017).

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