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net.simplace.sim.components.models.lintul5.RadiationUseEfficiency

Lintul5 - Simple generic model for simulation of crop growth - Radiation use efficiency part

Introduction

The sim components in the package lintul5 implement the Lintul5 algorithms from (L5). They are designed to reproduce same results (up to rounding errors) as the original FST program.

The original model is subdivided into multiple sim components (which should be used in the following order to be as close as possible to the original algorithm).

Irradiation
PotentialEvapoTranspiration
WaterBalance
Phenology
RadiationUseEfficiency
Lintul5

Daylength calculation is performed by the transformer component AstronomicParametersTransformer

RadiationUseEfficiency component calculates the radiation use efficiency

Description

The component calculates radiation use efficiency as well as Co2 and temperature correction factor. Calculations taken from original's CROPP() routine.

It takes inputs from the component Phenology.

It's outputs are used by Lintul5.

For documentation of the algorithms please consult the orginal documentation (L5)

Changes to original

Customizable calculation of day temp

Calculation of used temperature is made customizable by a variable cDayTempFactor. $$ \begin{eqnarray} DTemp & = & TMAX - cDayTempFactor \cdot (TMAX - TMIN) \\ \label{dtemp} & = & (1-cDayTempFactor) \cdot TMAX + (cDayTempFactor)\cdot TMIN \end{eqnarray} $$

The default value for cDayTempFactor is 0.25, so $DTemp$ equals the daytemp.
If the factor is 0.5, then $DTemp$ equals the mean temperature.
If the factor is 0.0, then $DTemp$ is the maximum temperature, if the factor is 1.0, then it's the minimum temperature.

Scale factors for calibration

As some parameters are given as interpolation tables, there have been added additional scale factors to make these values changeable for calibrations:

cScaleFactorRUE scales the RUE table RUETB

References

(L5) Joost Wolf, User guide for LINTUL5, Wageningen UR, Wageningen, 2012

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value	Default Value
constant	cCO	atmosferic CO2 concentration	DOUBLE	ppm	-	-	0.0
constant	cCOTB	table with correction factor of RUE as a function of atmospheric CO2 concentration	DOUBLEARRAY	1	-	-	-
constant	cCOTableCo2	CO2 concentration for correction of radiation use efficiency as a function of atmospheric (c.f. COTB)	DOUBLEARRAY	ppm	-	-	40.0 360.0 720.0 1000.0 2000.0
constant	cCOTableFactor	Correction of radiation use efficiency as a function of atmospheric CO2 concentration (c.f. COTB)	DOUBLEARRAY	1	-	-	0.0 1.0 1.35 1.5 1.5
constant	cDayTempFactor	Calculation factor for temperature means T = TMAX - f*(TMAX-TMIN). Default 0.25 gives day temp, 0.5 gives mean temp. See $\eqref{dtemp}$	DOUBLE	1	-	-	0.25
constant	cRUETB	radiation use efficiency as function of DVS	DOUBLEARRAY	g/MJ	-	-	-
constant	cRUETableDVS	DVS for radiation use efficiency for biomass production (c.f. RUETB)	DOUBLEARRAY	1	-	-	0.0 1.0 1.3 2.0
constant	cRUETableRUE	Radiation use efficiency for biomass production as function of DVS (c.f. RUETB)	DOUBLEARRAY	g/MJ	-	-	3.0 3.0 3.0 0.4
constant	cScaleFactorRUE	Scales the y-values of RUETB (for sensitivity analysis / calibration)	DOUBLE	1	-	-	1.0
constant	cTMNFTB	reduction factor of RUE as function of low minimum temperature	DOUBLEARRAY	1	-	-	-
constant	cTMNFTableFactor	Reduction factor of RUE as function of low min. temp. (c.f. TMNFTB)	DOUBLEARRAY	1	-	-	0.0 0.0 1.0 1.0
constant	cTMNFTableMinTemperature	Min Temp for reduction factor of RUE (c.f. TMNFTB)	DOUBLEARRAY	°C	-	-	-5.0 0.0 3.0 30.0
constant	cTMPFTB	reduction factor of RUE as function of mean daytime temperature	DOUBLEARRAY	1	-	-	-
constant	cTMPFTableFactor	Reduction factor of RUE as function of mean daytime temp (c.f. TMPFTB)	DOUBLEARRAY	1	-	-	0.0 0.0 0.6 1.0 1.0 0.0 0.0
constant	cTMPFTableMeanTemperature	Mean daytime temp for reduction factor of RUE (c.f. TMPFTB)	DOUBLEARRAY	°C	-	-	-1.0 0.0 10.0 15.0 30.0 35.0 40.0
input	iDVS	initial development stage of crop (from 0 to 2)	DOUBLE	1	-	-	0.0
input	iTMAX	maximal air temperature during day (output of routine WEATHR)	DOUBLE	°C	-	-	0.0
input	iTMIN	minimal air temperature during day (output of routine WEATHR)	DOUBLE	°C	-	-	0.0
out	RTMCO	overall correction factor for RUE in dependence of both CO2 concentration and non-optimal daytime and minimal temperatures	DOUBLE	1	-	-	0.0
out	RUE	radiation use efficiency	DOUBLE	g/MJ	-	-	0.0

See also: Irradiation, PotentialEvapoTranspiration, WaterBalance, Phenology, Lintul5, AstronomicParametersTransformer

public class RadiationUseEfficiency extends
net.simplace.sim.model.FWSimComponent {
// Public Constructors
public RadiationUseEfficiency(String aName, HashMap aFieldMap, HashMap
aInputMap, Element aSimComponentElement, FWSimVarMap aVarMap, int
aOrderNumber);
public RadiationUseEfficiency();

// Public Instance Methods

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

// Protected Instance Methods

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

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

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

creates a clone from this SimComponent for use in other threads

}

Hierarchy: java.lang.Object - net.simplace.sim.model.FWSimComponent (net.simplace.sim.util.FWSimFieldContainer) - RadiationUseEfficiency