net.simplace.client.simulation.lap.fao56.evapotran.ReferenceETPM

Calculates reference evapotranspiration ET0 by Penman-Monteith with the FAO56 approach.

FAO Penman-Monteith equation determines the evapotranspiration from the hypothetical grass reference surface. (FAO 56)

Uses daily max/min temperature, actual vapour pressure, net radiation and wind speed. Checks for valid actual vapour pressure values.

For documentation of the formulas please check the orginal reference (FAO 56)

References: (FAO 56): Allen, Crop evapotranspiration - Guidelines for computing crop water requirements - FAO Irrigation and drainage paper 56, 1998

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value
constant	cAltitude	elevation above sea level	DOUBLE	m	-	-
input	iActualVapourPressure	actual vapour pressure	DOUBLE	kPa	-	-
input	iNetRadiation	net radiation	DOUBLE	MJ/(m2 d)	-	-
input	iTMax	maximum daily temperature	DOUBLE	°C	-	-
input	iTMin	minimum daily temperature	DOUBLE	°C	-	-
input	iWindspeed	wind speed at 2m height	DOUBLE	metre_per_second	-	-
out	ReferenceCropEvapotranspiration	reference evapotranspiration (ET0)	DOUBLE	mm/d	-	-

public class ReferenceETPM extends net.simplace.simulation.model.FWSimComponent {
// Public Constructors
public ReferenceETPM();

// Public Instance Methods

public HashMap createVariables(); // Defines
net.simplace.simulation.model.FWSimComponent

Create the FWSimVariables as interface for this SimComponent

// Protected Instance Methods

protected void init(); // Defines
net.simplace.simulation.model.FWSimComponent

Initializes the fields by getting input and output FWSimVariables from VarMap

protected void process(); // Defines
net.simplace.simulation.model.FWSimComponent

Process the algorithm and write the results back to VarMap

protected FWSimComponent clone(FWSimVarMap aVarMap);
// Defines net.simplace.simulation.model.FWSimComponent

creates a clone from this SimComponent for use in other threads

}

Hierarchy: java.lang.Object - net.simplace.simulation.model.FWSimComponent (net.simplace.simulation.util.FWSimFieldContainer) - ReferenceETPM