Evapotranspiration Based on FAO Penman-Monteith Equation
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Documentation for package ‘FAO56’ version 1.0
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| FAO56-package | A package for computing the crop evapotranspiration and evapotranspiration rate from the reference surface by FAO Penman-Monteith equation |
| AtmPres | Atmospheric Pressure (P) |
| CSSRad | Clear-Sky Solar Radiation (R_so) |
| DD2Rad | Degree to Radian Converter |
| DH | Daylight Hours (N) |
| EarSunDis | Inverse Earth-Sun Distance (d_r) |
| EffPrec | Effective Monthly Precipitation (P_eff) |
| ETo_FPM | FAO Penman-Monteith Reference Evapotranspiration (ETo) Equation |
| ETo_Hrg | Hargreaves Reference Evapotranspiration (ETo) Equation |
| ETo_Pan | Evapotranspiration based on Pan Evaporation Method |
| ET_c | Crop Evapotranspiration (ET_c) |
| ExRad | Extraterrestrial Radiation for Daily Periods (R_a) |
| JulDate | Julian Date |
| Kc_Cereals | Crop Coefficients (Kc) of Cereals |
| Kc_Fibre_Crops | Crop Coefficients (Kc) of Fibre Crops |
| Kc_Forages | Crop Coefficients (Kc) of Forages |
| Kc_Fruit_Trees | Crop Coefficients (Kc) of Fruit Trees |
| Kc_Grapes_and_Berries | Crop Coefficients (Kc) of Grapes and Berries |
| Kc_Legumes | Crop Coefficients (Kc) of Legumes |
| Kc_Oil_Crops | Crop Coefficients (Kc) of Oil Crops |
| KC_Perennial_Vegetables | Crop Coefficients (Kc) of Perennial Vegetables |
| Kc_Roots_and_Tubers | Crop Coefficients (Kc) of Roots and Tubers |
| Kc_Small_Vegetables | Crop Coefficients (Kc) of Small Vegetables |
| Kc_Special | Crop Coefficients (Kc) of Special Areas |
| Kc_Sugar_Cane | Crop Coefficients (Kc) of Sugar Cane |
| Kc_Tropical_Fruits_and_Trees | Crop Coefficients (Kc) of Tropical Fruits and Trees |
| Kc_Vegetables_Cucumber_Family | Crop Coefficients (Kc) of Cucumber Family Vegetables |
| Kc_Vegetables_Solanum_Family | Crop Coefficients (Kc) of Solanum Family Vegetables |
| Kc_Wetlands_Temperate_Climate | Crop Coefficients (Kc) of Wetlands Temperate Climate |
| MeanRH | Mean Relative Humidity (RH_mean) |
| MeanTemp | Mean Daily Air Temperature (T_mean) |
| MSVP | Mean Saturation Vapour Pressure (e_s) |
| NLRad | Net Longwave Radiation (R_nl) |
| NRad | Net Radiation (R_n) |
| NSRad | Net Shortwave Radiation (R_ns) |
| PanCoef | Pan Coefficient (K_p) |
| PsyCon | Psychrometric Constant (gamma) |
| RelHum | Relative Humidity (RH) |
| SatVP | Saturation Vapour Pressure at a specific Air Temperature (e0T) |
| SlpSVPC | Slope of Saturation Vapour Pressure Curve (Delta) |
| SolDec | Solar Declination (delta) |
| SolRad | Solar Radiation (R_s) |
| SunHA | Sunset Hour Angel (omega_s) |
| WndSp2m | Wind Speed at the height 2 m Above Ground Surface |