| climatedata | Raw Climate Data Required for Calculating Evapotranspiration |
| constants | Constants Required for Calculating Evapotranspriation |
| defaultconstants | Universal constants Required for Calculating Evapotranspriation |
| ET | ET Formulations |
| ET.Abtew | Abtew Formulation |
| ET.BlaneyCriddle | Blaney-Criddle Formulation |
| ET.BrutsaertStrickler | Brutsaert-Strickler Formulation |
| ET.ChapmanAustralian | Chapman Formulation |
| ET.GrangerGray | Granger-Gray Formulation |
| ET.Hamon | Hamon Formulation |
| ET.HargreavesSamani | Hargreaves-Samani Formulation |
| ET.JensenHaise | Jensen-Haise Formulation |
| ET.Linacre | Linacre Formulation |
| ET.Makkink | Makkink Formulation |
| ET.MattShuttleworth | Matt-Shuttleworth Formulation |
| ET.McGuinnessBordne | McGuinness-Bordne Formulation |
| ET.MortonCRAE | Morton CRAE Formulation |
| ET.MortonCRWE | Morton CRWE Formulation |
| ET.Penman | Penman Formulation |
| ET.PenmanMonteith | Penman-Monteith Formulation |
| ET.PenPan | PenPan Formulation |
| ET.PriestleyTaylor | Priestley-Taylor Formulation |
| ET.Romanenko | Romanenko Formulation |
| ET.SzilagyiJozsa | Szilagyi-Jozsa Formulation |
| ET.Turc | Turc Formulation |
| ETComparison | Compare esimtated evapotranspiration among multiple sets of result |
| ETForcings | Plot esimtated evapotranspiration with climate variables |
| ETPlot | Plot the daily, monthly and annual aggregations of esimtated evapotranspiration |
| E_OBS | Observed Class-A Pan Evaporation |
| processeddata | Processed Climate Data Required for Calculating Evapotranspiration |
| ReadInputs | ReadInputs raw date and climate data |
| ReadOBSEvaporation | Read Raw Data of Observed Evaporation from file |