Package net.simplace.sim.components.crop.co2

Class Co2InfluenceOnTranspiration

java.lang.Object
net.simplace.sim.model.FWSimComponent
net.simplace.sim.components.crop.co2.Co2InfluenceOnTranspiration
All Implemented Interfaces:
net.simplace.sim.util.FWSimFieldContainer
public class Co2InfluenceOnTranspiration extends net.simplace.sim.model.FWSimComponent
Reduces the Transpiration due to increasing \(CO_2\) concentration in the atmosphere

\(CO_2\) calculation

The actual \(CO_2\) concentration in the atmosphere is calculated by a linear function based on the \(CO_2\) concentration (cStartValue) in the start year (cStartYear) and the slope (cSlope).

\[ \begin{equation} CO_2(Year) = Slope \cdot (Year-StartYear) + StartValue \label{co2} \end{equation} \]

Transpiration reduction

Transpiration is reduced by a factor \(f(CO_2)\) that depends linearly on the actual \(CO_2\) concentration by:

\[ \begin{eqnarray} f(CO_2) & = & Transpiration\_m \cdot CO_2 + Transpiration\_b \label{fco2}\\ ReducedTranspiration & = & Transpiration \cdot f(CO_2(year)) \label{redtrans} \end{eqnarray} \]

where \Transpiration\_m\ and \Transpiration\_b\ are the slope and the intercept of the linear function being set to 1.1. and -0.0003 respectively by default. The reduced transpiration is calculated by multiplying the transpiration as determined by crop water demand and soil water supply with the reduction factor \(f(CO_2)\). This value of reduced transpiration is then compared with the potential crop transpiration PTRAN to calculate crop water stress (TRANRF) (e.g. in the SimComponent LintulWaterStress and the impact on crop growth rate.

Remarks

If you want to switch of the \(CO_2\) effect on transpiration (e.g. if you use want to use the same solution with projects to calculate with and without \(CO_2\) effect), then you can parameterize the component, so that the factor is always 1:

  • set cTranspiration_m to 0
  • set cTranspiration_b to 1

For clarity reasons however, it is recommended to use different solutions and to remove the SimComponent from the solution, if you don't want to calculate \(CO_2\) effect on transpiration.

References

Calculations due to LintulFAST. Further reference needed!

Author:
Gunther Krauss, Andreas Enders

Component Variables

Content TypeNameDescriptionData TypeUnitMin ValueMax ValueDefault Value
constantcSlopeSlope of the linear function calculating the \(CO_2\) concentration in the atmosphere \(\eqref{co2}\)DOUBLEppm/a0.020.03.5
constantcStartValueStart \(CO_2\) value of the linear function calculating the \(CO_2\) concentration \(\eqref{co2}\)DOUBLEppm220.0400.0350.0
constantcStartYearStart year of the linear function calculating the \(CO_2\) concentration \(\eqref{co2}\)INTa193020201990
constantcTranspiration_bIntercept of the linear function calculating the reduction factor \(\eqref{fco2}\)DOUBLE10.020.01.1
constantcTranspiration_mSlope of the linear function calculating the reduction factor \(\eqref{fco2}\)DOUBLEppm-10.020.0-3.0E-4
inputiTranspiration(Unreduced) transpirationDOUBLEmm/d0.020.0-
outTranspirationReduced transpiration by \(CO_2\) \(\eqref{redtrans}\)DOUBLEmm/d0.020.0-

  • 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
    Co2InfluenceOnTranspiration()
    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

    • Co2InfluenceOnTranspiration

      public Co2InfluenceOnTranspiration()
      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)