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net.simplace.usermodules.roelof.CropEvapTranDualFAOSoilEvap

Calculates the basal crop coefficient and the upper limit of soil evaporation coefficient Calculates also potential crop transpiration and upper limit of potential soil evaporation.

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value	Default Value
constant	cCharacteristicMeanRelHumidity	region's characteristic mean daily min relative humidity for mid/late growth season	DOUBLE	%	0.0	100.0	45.0
constant	cCharacteristicWindSpeed	region's characteristic wind speed at 2m during the mid growing season m s-1	DOUBLE	m/s	0.0	-	2.0
constant	cCropHeight	average crop height during mid/late season	DOUBLE	m	0.0	5.0	0.0
constant	cKcMin	min Kc for dry bare soil with no ground cover	DOUBLE	1	0.0	2.0	0.15
constant	cKcbIni	nominal Kcb value during initial growth stage	DOUBLE	1	0.0	2.0	0.0
constant	cKcbMid	nominal peak Kcb value obtained during mid season growth stage	DOUBLE	1	0.0	2.0	0.0
constant	cMaxSoilEvaporationDepth	-	DOUBLE	m	0.0	2.0	0.12
constant	cREW	Readily evaporable water	DOUBLE	m	0.0	1.0	-
constant	cSoilWaterFieldCapacity	-	DOUBLEARRAY	m3/m3	0.0	1.0	-
constant	cSoilWaterInitial	Inital soil water content	DOUBLEARRAY	m3/m3	0.0	1.0	-
constant	cSoilWaterWiltingPoint	-	DOUBLEARRAY	m3/m3	0.0	1.0	-
constant	cTHICKL	Thickness of layers	DOUBLE	m	0.001	20.0	0.03
constant	cWettedSoilFraction	fraction of soil surface wetted by rain or irrigation	DOUBLE	1	0.0	1.0	1.0
constant	iK_S	Crop water stress factor	DOUBLE	1	0.0	1.0	1.0
constant	if_c	Covered soil fraction (optional - normally calculated from crop height)	DOUBLE	1	0.0	1.0	-
input	iDVS	daily value of development stage	DOUBLE	1	0.0	2.5	0.0
input	iDoHarvest	harvesting	BOOLEAN	1	-	-	false
input	iDoSow	sowing	BOOLEAN	1	-	-	false
input	iET0	reference crop evapotranspiration	DOUBLE	mm	0.0	20.0	0.0
input	iLAI	daily estimated leaf area index	DOUBLE	1	0.0	20.0	0.0
state	sWR	Retained water (mm)	DOUBLEARRAY	mm	-	-	-
ETC	crop ET under standard conditions (no water, nutrient, weed, pest or disease limitations to growth)	DOUBLE	mm d-1	null
Kcb	basal crop coefficient	DOUBLE	1	null
Ke	soil evaporation coefficient	DOUBLE	1	null
KeUpper	upper limit of soil evaporation coefficient	DOUBLE	1	null
PotentialTranCrop	Potential rate of transpiration from the soil	DOUBLE	mm d-1	null
SoilEvapCrop	Actual rate of evaporation from the soil	DOUBLE	mm d-1	null
SoilEvapCropUpper	potential (if wet) rate of evaporation from the soil	DOUBLE	mm d-1	null

public class CropEvapTranDualFAOSoilEvap extends
net.simplace.simulation.model.FWSimComponent {
// Public Constructors
public CropEvapTranDualFAOSoilEvap();

// Public Instance Methods

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

Create the FWSimVariables as interface for this SimComponent

// Protected Instance Methods

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

Initializes the fields by getting input and output FWSimVariables from VarMap

protected void initValues();

protected void resetOnHarvest();

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

Process the algorithm and write the results back to VarMap

protected void PotTran();

Calculates K_cb and potential transpiration of crop

protected void SoilEvap();

Calculates K_e and soil evaporation

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

creates a clone from this SimComponent for use in other threads

}

Hierarchy: java.lang.Object - net.simplace.simulation.model.FWSimComponent (net.simplace.simulation.util.FWSimFieldContainer) - CropEvapTranDualFAOSoilEvap