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. Author manuscript; available in PMC: 2019 Aug 8.
Published in final edited form as: Water (Basel). 2018 Jul 27;10(8):991. doi: 10.3390/w10080991

Table 3.

Calibrated Potential Evapotranspiration parameters for the base model.

Parameter Description Cover Type Value Unit
PetParam1 First term of PET Hamon equation Agriculture (corn)
Forest
Lawn
Impervious area		 0.20
0.30
0.15
0.05		 -
PetParam2 Second term of PET Hamon equation Agriculture (corn)
Forest
Lawn
Impervious area		 0.622 -
TemperaturePetOff PET is only active when air temperature is greater than this value Agriculture (corn)
Forest
Lawn
Impervious area		 −3 C°
roair Air density Agriculture (corn)
Forest
Lawn
Impervious area		 1300 g m−3
be ET coefficient used in the logistic equation that computes ET from PET Agriculture (corn)
Forest
Lawn
Impervious area		 3.07 -
noTranspirationPetFraction The fraction of PET available outside of this cover’s growing season Agriculture (corn)
Forest
Lawn
Impervious area		 1 -