| 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 |