Package net.simplace.sim.components.experimental.intercropping

Klasse SplitWaterUptake

java.lang.Object

net.simplace.sim.model.FWSimComponent

net.simplace.sim.components.experimental.intercropping.SplitWaterUptake

Alle implementierten Schnittstellen:

net.simplace.sim.util.FWSimFieldContainer

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

Splits water uptake between two crops

The water uptake per layer is split between the two crops proportionally to the given factors per layer.

Under some circumstances (e. g. when water demand is fulfilled by lower layers, where only one plant has roots), one plant would get more water than needed. In this case, the surplus can be redistributed partially (i. e. from those layers, where both plants have roots) to the other plant.

The module is designed to work with layered water models like SlimWater or Hillflow1D, that calculate water uptake per layer from mobile water and retained water fraction.

Calculation

Let \(f_{1,i}, f_{2,1}\) the allocation factors of layer \(i\) for plant 1 and 2, \(W_{i}\) the water uptake per layer due to the common demand and root distributions and \(P_1, P_2\) the potential transpiration of the two crops. Note that the potential transpiration for each crop is scaled to the fractions covered by each crop.

The actual water uptake per layer for both crops \(A_{1,i}, A_{2,i}\) are then calculated by

\[ A_{1,i} = \frac{f_{1,i}}{f_{1,i}+f_{2,i}} \cdot W_i \\ A_{2,i} = \frac{f_{2,i}}{f_{1,i}+f_{2,i}} \cdot W_i \]

and the actual transpirations are the sums over all layers

\[ A_1 = \sum_i A_{1,i} \quad \quad A_2 = \sum_i A_{2,i} \]

If the one of the uptake ratios

\[ u_1 = \frac{A_1}{P_1} \quad \quad u_2 = \frac{A_2}{P_2} \]

is bigger than 1 (i. e. the uptake would be higher than the demand),

then the actual water uptake per layer is reduced proportionally over all layers:

\[ A_{k,i} = \frac{1}{u_k} \cdot A_{k,i} \quad k=1 \quad \text{or} \quad k=2 \]

and the surplus per layer \(s_{k,i}\) is the difference of old and corrected uptake.

If cRedistributeBetweenPlants is set to true (the default), then the surplus is given to the other plant for those layers, where the allocation factor is nonzero (i. e. there are roots).

\[ A_{l,i} = A_{l,i} + s_{k,i} \quad \text{where} \quad k=1, l=2 \quad \text{or} \quad k=2, l=1 \]

If the corrected actual uptake per layer for both crops is lower than the initial uptake, then the unused water per layer is calculated. Unused water is left first in the retained fraction, and if there is still too much, the rest goest to mobile fraction of unused water.

References

Autor:

G. Krauss

Siehe auch:

• BelowgroundAllocationFactor

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value	Default Value
constant	cRedistributeBetweenPlants	With different root depths one plant could get more water then actually needed. The surplus can partially be given to the other plant.	BOOLEAN		-	-	true
input	iFactor1PerLayer	Below ground allocation factor for crop 1 per layer	DOUBLEARRAY	1	0.0	1.0	-
input	iFactor2PerLayer	Below ground allocation factor for crop 2 per layer	DOUBLEARRAY	1	0.0	1.0	-
input	iMobileWaterUptakePerLayer	Crop available mobile water per layer in soil	DOUBLEARRAY	mm	0.0	-	-
input	iPotentialTranspiration1	Potential transpiration of crop 1	DOUBLE	mm	0.0	-	0.0
input	iPotentialTranspiration2	Potential transpiration of crop 2	DOUBLE	mm	0.0	-	0.0
input	iRetainedWaterUptakePerLayer	Crop available retained water per layer in soil	DOUBLEARRAY	mm	0.0	-	-
input	iWaterUptakePerLayer	Crop available water per layer in soil	DOUBLEARRAY	mm	0.0	-	-
out	ActualTranspiration1	Actual transpiration of crop 1	DOUBLE	mm	0.0	1.0	0.0
out	ActualTranspiration1PerLayer	Water actually transpired per layer of crop 1	DOUBLEARRAY	mm	0.0	1.0	-
out	ActualTranspiration2	Actual transpiration of crop 2	DOUBLE	mm	0.0	1.0	0.0
out	ActualTranspiration2PerLayer	Water actually transpired per layer of crop 2	DOUBLEARRAY	mm	0.0	1.0	-
out	UnusedMobileWaterPerLayer	Water that is not uptaken by the plants from mobile water	DOUBLEARRAY	mm	0.0	1.0	-
out	UnusedRetainedWaterPerLayer	Water that is not uptaken by the plants from retained water	DOUBLEARRAY	mm	0.0	1.0	-
out	UnusedWaterPerLayer	Water that is not uptaken by the plants	DOUBLEARRAY	mm	0.0	1.0	-

Verschachtelte Klassen - Übersicht

Von Klasse geerbte verschachtelte Klassen/Schnittstellen net.simplace.sim.model.FWSimComponent

net.simplace.sim.model.FWSimComponent.TEST_STATE

Feldübersicht

Von Klasse geerbte Felder net.simplace.sim.model.FWSimComponent

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

Konstruktorübersicht

Konstruktoren

Modifizierer	Konstruktor	Beschreibung
	SplitWaterUptake()	called from class.forName()
protected	SplitWaterUptake(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)

Methodenübersicht

Modifizierer und Typ	Methode	Beschreibung
protected net.simplace.sim.model.FWSimComponent	clone(net.simplace.sim.util.FWSimVarMap aVarMap)
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	initVariables()
protected void	process()

Von Klasse geerbte Methoden 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

Von Klasse geerbte Methoden java.lang.Object

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

Konstruktordetails

SplitWaterUptake

protected SplitWaterUptake(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)

Parameter:

aName -

aFieldMap -

aInputMap -

aSimComponentElement -

aVarMap -

aOrderNumber -

SplitWaterUptake

public SplitWaterUptake()

called from class.forName()

Methodendetails

createVariables

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

Angegeben von:

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

Angegeben von:

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

init

protected void init()

Angegeben von:

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

initVariables

protected void initVariables()

process

protected void process()

Angegeben von:

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

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.

Angegeben von:

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

Siehe auch:

• Ungültige Referenz

  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)

Angegeben von:

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

Siehe auch:

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