net.simplace.sim.components.evapotran.ReferenceETPriestleyTaylor

Calculates reference evapotranspiration ET0 according to the Priestley-Taylor method, using solar radiation and temperature.

Priestley-Taylor (1972)

Uses the equation developed by Priestley and Taylor (1972) for ET0 calculation from temperature and solar radiation.

"The Priestley-Taylor equation was developed as a substitute to the Penman-Monteith equation to remove dependence on observations. For Priestley-Taylor, only radiation (irradiance) observations are required. This is done by removing the aerodynamic terms from the Penman-Monteith equation and adding an empirically derived constant factor, \alpha. (source: Wikipedia)

References

Priestley, C.H.B., Taylor, R.J., 1972. On the Assessment of Surface Heat Flux and Evaporation Using Large-Scale Parameters. Monthly Weather Review 100, 81-92. doi:10.1175/1520-0493(1972)100<0081:OTAOSH>2.3.CO;2

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value	Default Value
constant	cAlphaPT	Priestley-Taylor coefficient	DOUBLE	1	0.0	-	1.26
constant	cAltitude	altitude	DOUBLE	m	-	-	0.0
input	iNetRadiation	net radiation	DOUBLE	MJ/(m2 d)	-	-	0.0
input	iTMax	maximum daily temperature	DOUBLE	°C	-	-	0.0
input	iTMin	minimum daily temperature	DOUBLE	°C	-	-	0.0
out	ReferenceCropEvapotranspiration	reference evapotranspiration (ET0)	DOUBLE	mm/d	-	-	0.0

public class ReferenceETPriestleyTaylor extends
net.simplace.sim.model.FWSimComponent {
// Public Constructors
public ReferenceETPriestleyTaylor();

// Public Instance Methods

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

Create the FWSimVariables as interface for this SimComponent

// Protected Instance Methods

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

Initializes the fields by getting input and output FWSimVariables from VarMap

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

Process the algorithm and write the results back to VarMap

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

creates a clone from this SimComponent for use in other threads

}

Hierarchy: java.lang.Object - net.simplace.sim.model.FWSimComponent (net.simplace.sim.util.FWSimFieldContainer) - ReferenceETPriestleyTaylor