Package net.simplace.sim.components.crop.heatstress

Class HeatStressOnGrain

java.lang.Object

net.simplace.sim.model.FWSimComponent

net.simplace.sim.components.crop.heatstress.HeatStressOnGrain

All Implemented Interfaces:

net.simplace.sim.util.FWSimFieldContainer

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

HeatStressOnGrain calculates the heat stress factor (HeatStressFactor) around anthesis (approx. 30 days around anthesis) based on the daily heat stress intensity. The day which day temperature is above certain threshold TempCritical (e.g. 27 °C for winter wheat) count as heated day. The highest daily heat stress intensity occur whenever day temperature is above limited temperature TempLimit (e.g. 40 °C for winter wheat). All equations documented in (T).

The critical and limit temperatures can be customized, as well as the number of days before and after anthesis, when stress should be taken into account.

Instead of providing the number of days, one can give the devstages when the heat stress period starts and ends. The number of days are then calculated from phenology.

Daily inputs are: min and max temperatures, dev stage, temperature sum, anthesis date and yield.

Daily stress factor

\( \begin{eqnarray} TDay_i & = & Tmax_i - \frac{Tmax_i-Tmin_i}{4} \\ DailyStressFactor_i & = & \max(0,\min(1,\frac{TDay_i - TempCritical}{TempLimit-TempCritical})) \\ \end{eqnarray} \)

Heat stress factor

\( \begin{eqnarray} CummulatedHeatStressFactor & = & \sum_{i=AnthesisDOY - DaysBeforeAnthesis}^{AnthesisDoy + DaysFromAnthesis} DailyStressFactor_i \\ HeatStressFactor & = & \frac{CummulatedHeatStressFactor}{DaysBeforeAnthesis + DaysFromAnthesis+1} \\ \end{eqnarray} \)

Adjusted yield

\( \begin{eqnarray} AdjustedYield & = & (1-HeatStressFactor) \cdot Yield \\ \end{eqnarray} \)

References:

(T) Teixeira, E., Fischer, G., Velthuizen, H., Walter, C., Ewert, F. 2013. Global hot-spots of heat stress on agricultural crops due to climate change. Agriculture and Forest meteorology, 170:206-2015.

Author:

Gunther Krauss, Ehsan Eyshi Rezaei "eeyshire@uni-bonn.de"

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value	Default Value
constant	cBeginDevStage	Development stage before anthesis which thermal sensitive period start	DOUBLE	1	-	-	0.8
constant	cDaysBeforeAnthesis	Thermal sensitive days before anthesis	INT	1	-	-	0
constant	cDaysFromAnthesis	Thermal sensitive days after anthesis	INT	1	-	-	0
constant	cEndDevStage	Development stage before anthesis which thermal sensitive period end	DOUBLE	1	-	-	1.3
constant	cTempCritical	Critical temperature threshold to start of heat stress	DOUBLE	°C	-	-	27.0
constant	cTempLimit	The temperature which maximum heat stress occurs	DOUBLE	°C	-	-	40.0
input	iAnthesisDate	Anthesis date	DATE	1	-	-	-
input	iDevStage	Development stage	DOUBLE	1	-	-	0.0
input	iTMax	Daily maximum temperature	DOUBLE	°C	-	-	0.0
input	iTMin	Daily minimum temperature	DOUBLE	°C	-	-	0.0
input	iTempSum	Temperature sum	DOUBLE	°C d	-	-	0.0
input	iYield	Simulated yield before heat stress adjustment	DOUBLE	g/m2	-	-	0.0
state	sAffectedDays	Days which heat stress occurs	INT	1	-	-	0
state	sCumulatedHeatStressFactor	Cumulative heat stress factor	DOUBLE	1	-	-	0.0
state	sDays	Number of days related to thermal sensitive period	INT	1	-	-	0
state	sTDay	Day time temperature	DOUBLE	°C	-	-	0.0
rate	rDailyHeatStressFactor	Daily heat stress factor	DOUBLE	1	-	-	0.0
out	AdjustedYield	Adjusted yield by heat stress	DOUBLE	g/m2	-	-	0.0
out	BeginDOY	Begin of thermal sensitive period (day of year format)	INT	1	-	-	0
out	BeginDevStage	Begin of thermal sensitive period (Development stage format)	DOUBLE	1	-	-	0.0
out	BeginTempSum	Begin of thermal sensitive period (temperature sum format)	DOUBLE	°C d	-	-	0.0
out	EndDOY	End of thermal sensitive period (day of year format)	INT	1	-	-	0
out	EndDevStage	End of thermal sensitive period (Development stage format)	DOUBLE	1	-	-	0.0
out	EndTempSum	End of thermal sensitive period (temperature sum format)	DOUBLE	°C d	-	-	0.0
out	HeatStressFactor	Heat stress factor	DOUBLE	1	-	-	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
HeatStressOnGrain()	Empty constructor used by class.forName()
HeatStressOnGrain(String aName, HashMap<String,net.simplace.sim.util.FWSimVariable<?>> aFieldMap, HashMap<String,String> aInputMap, org.jdom2.Element aSimComponentElement, net.simplace.sim.util.FWSimVarMap aVarMap, int aOrderNumber)

Method Summary

Modifier and Type	Method	Description
protected net.simplace.sim.model.FWSimComponent	clone(net.simplace.sim.util.FWSimVarMap aVarMap)	creates a clone from this SimComponent for use in other threads
HashMap<String,net.simplace.sim.util.FWSimVariable<?>>	createVariables()
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()
protected void	process()

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

HeatStressOnGrain

public HeatStressOnGrain(String aName,
 HashMap<String,net.simplace.sim.util.FWSimVariable<?>> aFieldMap,
 HashMap<String,String> aInputMap,
 org.jdom2.Element aSimComponentElement,
 net.simplace.sim.util.FWSimVarMap aVarMap,
 int aOrderNumber)

Parameters:

aName -

aFieldMap -

aInputMap -

aSimComponentElement -

aVarMap -

aOrderNumber -

HeatStressOnGrain

public HeatStressOnGrain()

Empty constructor used by class.forName()

Method Details

createVariables

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

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()

Specified by:

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

See Also:

• FWSimComponent.init()

process

protected void process()

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)

creates a clone from this SimComponent for use in other threads

Specified by:

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

See Also:

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