Package net.simplace.sim.components.vapourpressure.fao56

Class Vapourpressure

java.lang.Object

net.simplace.sim.model.FWSimComponent

net.simplace.sim.components.vapourpressure.fao56.Vapourpressure

All Implemented Interfaces:

net.simplace.sim.util.FWSimFieldContainer

public class Vapourpressure
extends net.simplace.sim.model.FWSimComponent

Calculates vapour pressure by one of (FAO 56) methods chosen by the user.

List of calculation methods and data needed

Method	Description	Required input data	Additional parameters	Remark
1	Dewpoint	dewpoint temperature	-	default calculation method
2	Psychrometric Data	dry and wet bulb temperature	altitude, psychrometric constant of instrument (default 0.00080)
3	Relative max and min humidity	max and min relative humidity, min and max temperature	-	-
4	Relative max humidity	max relative humidity, min temperature
5	Relative mean humidity	mean relative humidity, min and max temperature

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

Author:

Gunther Krauss, gk@uni-bonn.de

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value	Default Value
constant	cAltitude	elevation above sea level	DOUBLE	m	-	-	0.0
constant	cCalculationMethod	calculation method	INT		-	-	1
constant	cPsychrometricConstantInstrument	psychrometric constant of instrument	DOUBLE	1	-	-	8.0E-4
input	iRelHumidityMax	maximum relative humidity	DOUBLE	%	-	-	0.0
input	iRelHumidityMean	mean relative humidity	DOUBLE	%	-	-	0.0
input	iRelHumidityMin	minimum relative humidity	DOUBLE	%	-	-	0.0
input	iTDewpoint	dew point temperature	DOUBLE	°C	-	-	0.0
input	iTDryBulb	dry bulb temperature	DOUBLE	°C	-	-	0.0
input	iTMax	maximum daily temperature	DOUBLE	°C	-	-	0.0
input	iTMin	minimum daily temperature	DOUBLE	°C	-	-	0.0
input	iTWetBulb	wet bulb temperature	DOUBLE	°C	-	-	0.0
out	ActualVapourPressure	actual vapour pressure	DOUBLE	kPa	-	-	0.0

Nested Class Summary

Nested classes/interfaces inherited from class net.simplace.sim.model.FWSimComponent

net.simplace.sim.model.FWSimComponent.TEST_STATE

Field Summary

Fields inherited from class net.simplace.sim.model.FWSimComponent

iFieldMap, iFrequence, iInputMap, iJexlRule, iMasterComponentGroup, iName, iOrderNumber, isComponentGroup, iSimComponentElement, iSimModel, iVarMap

Constructor Summary

Constructors

Constructor	Description
Vapourpressure()	Empty constructor used by class.forName()

Method Summary

Modifier and Type	Method	Description
protected net.simplace.sim.model.FWSimComponent	clone(net.simplace.sim.util.FWSimVarMap aVarMap)
HashMap<String,net.simplace.sim.util.FWSimVariable<?>>	createVariables()	Create the FWSimVariables as interface for this SimComponent
HashMap<String,net.simplace.sim.util.FWSimVariable<?>>	fillTestVariables(int aParamIndex, net.simplace.sim.model.FWSimComponent.TEST_STATE aDefineOrCheck)	called for single component test to check the components algorithm.
protected void	init()	Initializes the fields by getting input and output FWSimVariables from VarMap
protected void	process()	Process the algorithm and write the results back to VarMap

Methods inherited from class net.simplace.sim.model.FWSimComponent

addVariable, bind, checkCondition, createSimComponent, createSimComponent, createSimComponent, createSimComponent, doProcess, getConstantVariables, getContentType, getCreateFormXML, getDescription, getEditFormXML, getFieldMap, getFrequence, getFrequenceRuleScript, getInputs, getInputVariables, getMasterComponentGroup, getName, getOrderNumber, getOutputVariables, getVariable, getVariableField, getVarMap, initialize, isConditionCheck, isVariableAvailable, performLinks, performLinks, readInputs, removeVariable, reset, runComponentTest, setVariablesDefault, toComponentLinkingXML, toDocXML, toGroupXML, toOutputDefinitionXML, toResourcesDataXML, toResourcesDefinitionXML, toString, toXML, writeVarInfos

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

Vapourpressure

public Vapourpressure()

Empty constructor used by class.forName()

Method Details

createVariables

public HashMap<String,net.simplace.sim.util.FWSimVariable<?>> createVariables()

Create the FWSimVariables as interface for this SimComponent

Specified by:

createVariables in interface net.simplace.sim.util.FWSimFieldContainer

Specified by:

createVariables in class net.simplace.sim.model.FWSimComponent

See Also:

• FWSimComponent.createVariables()

init

protected void init()

Initializes the fields by getting input and output FWSimVariables from VarMap

Specified by:

init in class net.simplace.sim.model.FWSimComponent

See Also:

• FWSimComponent.init()

process

protected void process()

Process the algorithm and write the results back to VarMap

Specified by:

process in class net.simplace.sim.model.FWSimComponent

See Also:

• FWSimComponent.process()

fillTestVariables

public HashMap<String,net.simplace.sim.util.FWSimVariable<?>> fillTestVariables(int aParamIndex,
 net.simplace.sim.model.FWSimComponent.TEST_STATE aDefineOrCheck)

called for single component test to check the components algorithm.

Specified by:

fillTestVariables in class net.simplace.sim.model.FWSimComponent

See Also:

• net.simplace.sim.util.FWSimFieldContainer#fillTestVariables(int aParamIndex, TEST_STATE aDefineOrCheck)

clone

protected net.simplace.sim.model.FWSimComponent clone(net.simplace.sim.util.FWSimVarMap aVarMap)

Specified by:

clone in class net.simplace.sim.model.FWSimComponent

See Also:

• FWSimComponent.clone(net.simplace.sim.util.FWSimVarMap)