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Potential Evapotranspiration models

HydroTools.ET0_eq — Function
ET0_eq(Rn::T, Tair::T, Pa::T=atm, args...)

Equilibrium evaporation, ET0_eq = slope / (slope + gamma) * Rn

Arguments

  • Rn : net radiation (W m-2)
  • Tair : 2m air temperature (degC)
  • VPD : vapor pressure deficit (kPa)
  • Pa : surface air pressure (kPa)

Returns

  • lambda : latent heat of vaporization (MJ kg-1)
  • slope : slope of the saturation vapor pressure curve (kPa degC-1)
  • gamma : psychrometric constant (kPa degC-1)
  • Eeq : equilibrium evaporation rate (mm day-1)

Optional keyword arguments

  • args... : additional arguments (not used in this function)

Examples

julia> ET0_eq(200.0, 20.0, 2.0)
(2.456, 0.14474018811241365, 0.0013262323104019538, 6.971947723218883)
source
HydroTools.ET0_Penman48 — Function
ET0_Penman48(Rn::T, Tair::T, VPD::T, wind::T, Pa::T=atm; z_wind=2)

Examples

ET0_Penman48(200., 20., 2., 2.)
source
HydroTools.ET0_FAO98 — Function
ET0_FAO98(Rn::T, Tair::T, VPD::T, wind::T, Pa::T=atm; z_wind=2, tall_crop=false)

Examples

ET0_Penman48(200., 20., 2., 2.)
ET0_FAO98(200.0, 20.0, 2.0, 2.0)
source