Reference evapotranspiration (ETo) can be
calculated from meteorological data. The four essential parameters are
air temperature, relative humidity, solar radiation and wind speed. Other
parameters such as net radiation, soil heat flux and air pressure may be
used if available to improve the validity of the results.
Input data files All data files in ASCII characters,
and "rectangular" format are compatible, including weather data files from
the DL2e and DL3000 Data Logger. A wide variety of data units can be accepted,
eg for solar radiation, kW/m2, MJ/m2, sunshine hours,
minutes or fraction, are all acceptable.
ETo output files The program creates standard
ASCII files of ETo, and rainfall (if included in the input data) for each
day (or time-step), and a daily summary of all input data parameters. There
is a free choice of the synoptic hour. The output files can be viewed on-screen
and then exported to spreadsheets or to other software applications.
Further details are given in our Water Relations catalogue
Daily rainfall and ET plotted in Excel
