SAGA-GIS Tool Library Documentation (v7.8.2)

Tool Evapotranspiration (Table)

Estimation of daily potential evapotranspiration from weather data with different methods. Besides mean daily temperature it depends on the chosen method which additional data has to be provided. In order to estimate extraterrestrial net radiation some of the methods need to know the location's geographic latitude and the date's Julian day number.


References


Parameters

 NameTypeIdentifierDescriptionConstraints
InputDataTable, inputTABLE--
OutputEvapotranspiration (*)Table, output, optionalRESULT--
OptionsMean TemperatureTable fieldT[Celsius]-
Minimum TemperatureTable fieldT_MIN[Celsius]-
Maximum TemperatureTable fieldT_MAX[Celsius]-
Relative HumidityTable fieldRH[Percent]-
Solar RadiationTable fieldSRdaily sum of global radiation [J/cm^2]-
Wind SpeedTable fieldWSdaily mean of wind speed at 2m above ground [m/s]-
Air PressureTable fieldP[kPa]-
DateTable fieldDATE--
Evapotranspiration (*)Table fieldET--
LatitudeFloating pointLAT-Minimum: -90.000000
Maximum: 90.000000
Default: 53.000000
MethodChoiceMETHOD-Available Choices:
[0] Turc
[1] Hargreave
[2] Penman (simplified)
[3] Penman-Monteith
Default: 0
(*) optional

Command-line

Usage: saga_cmd climate_tools 6 [-TABLE <str>] [-RESULT <str>] [-T <str>] [-T_MIN <str>] [-T_MAX <str>] [-RH <str>] [-SR <str>] [-WS <str>] [-P <str>] [-DATE <str>] [-ET <str>] [-LAT <double>] [-METHOD <str>]
  -TABLE:<str> 	Data
	Table, input
  -RESULT:<str>	Evapotranspiration
	Table, output, optional
  -T:<str>     	Mean Temperature
	Table field
  -T_MIN:<str> 	Minimum Temperature
	Table field
  -T_MAX:<str> 	Maximum Temperature
	Table field
  -RH:<str>    	Relative Humidity
	Table field
  -SR:<str>    	Solar Radiation
	Table field
  -WS:<str>    	Wind Speed
	Table field
  -P:<str>     	Air Pressure
	Table field
  -DATE:<str>  	Date
	Table field
  -ET:<str>    	Evapotranspiration
	Table field
  -LAT:<double>	Latitude
	Floating point
	Minimum: -90.000000
	Maximum: 90.000000
	Default: 53.000000
  -METHOD:<str>	Method
	Choice
	Available Choices:
	[0] Turc
	[1] Hargreave
	[2] Penman (simplified)
	[3] Penman-Monteith
	Default: 0