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net.simplace.sim.components.management.ReSowManagement

Determines sowing or re-sowing date as function of precipitation.

Sowing can occur only during a sowing period which starts when the input variable iStartSowingPhase becomes true and lasts cSowingWindowDays
Sowing is triggered, when the sum of iPrecipitation of the last cPrecipitationDays is bigger than cMinimumPrecipitationSum
if during the cDroughtCrititalPeriod (in days) there are more than cMaximumDroughtDays where iPrecipitation is below cPrecipitationThreshold, then a re-sowing is required
for the re-sowing hold the same rules as for sowing: precipitation sum of previous days must be high enough and the actual day is still in the sowing period
when iDoReset is true, all states are reset
most important output is DoSow, which is true when (re)sowing should be done it is required as an input by some other modules (phenology, biomass production, roots etc.)
NeedsReSowing is true, when there was too much drought after sowing, but the conditions for re-sowing are not fullfilled yet.
SowingDOY holds the day of year, when DoSow is true. Some modules (e. g. Lintul5 Phenology) need for starting not only DoSow, but also a sowing DOY.
other output have a more informative character

References

Laux, P., Kunstmann, H., Bardossy, A., 2008. Predicting the regional onset of the rainy season in West Africa. Int. J. Climatol. 28, 329-342.
Diallo, M.A., 2001. Statistical analyse of agroclimatic parameters based on regional meteorological data based. Centre Regional AGRHYMET Tech. Rep., Niamey, Niger, pp. 88.
Dodd, D.E.S., Jolliffe, I.T., 2001. Early detection of the start of the wet season in semiarid tropical climates of western Africa. Int. J. Climatol. 21, 1252-1262.

Component Variables

Content Type	Name	Description	Data Type	Unit	Min Value	Max Value	Default Value
constant	cDroughtCriticalPeriod	Time span in days after sowing drought days are considered for possible resowing	INT	d	-	-	30
constant	cMaximumDroughtDays	If number of drought days is bigger than MaximumDroughtDays, then resowing is required.	INT	d	-	-	7
constant	cMinimumPrecipitationSum	Minimum amount of precipitation that has been acumulated during last cPrecipitationDays	DOUBLE	mm	-	-	30.0
constant	cPrecipitationDays	Number of days where precipitation is acumulated to decide about sowing	INT	d	-	-	5
constant	cPrecipitationThreshold	If daily precipitation is below this threshold, the day is counted as a drought day	DOUBLE	mm	0.0	1.0	0.1
constant	cSowingWindowDays	Time span in days after start where (re)sowing is possible	INT	d	-	-	60
input	iDoReset	Boolean that triggers resetting of all counts (except TotalDays) and states	BOOLEAN	1	-	-	false
input	iPrecipitation	Daily precipitation	DOUBLE	mm	-	-	0.0
input	iStartSowingPhase	Boolean that triggers the start of sowing period.	BOOLEAN	1	-	-	false
input	iTRANRF	Daily stress factor due to transpiration reduction	DOUBLE	1	-	-	1.0
out	DaysSinceSowing	Days since last DoSow was triggered	INT	d	-	-	0
out	DaysSinceStart	Days since start of sowing period phase	INT	d	-	-	0
out	DoSow	Is set to true, when sowing is required and possible.	BOOLEAN	1	-	-	false
out	DroughtDays	Number of days where TRANRF is below the threshold	INT	d	-	-	0
out	HasSown	Is true, when sowing has been triggered.	BOOLEAN	1	-	-	false
out	HasStarted	Is set to true, when start of sowing period is triggered.	BOOLEAN	1	-	-	false
out	NeedsReSowing	Is true, when number of drought days exceeds the maximum and simulation is still in the sowing window.	BOOLEAN	1	-	-	false
out	PreviousDaysPrecipitation	Array that holds the precipitation of the last Precipitation days. Values are cyclically updated.	DOUBLEARRAY	mm	-	-	-
out	PreviousDaysPrecipitationSum	Sum of the previous days precipitation	DOUBLE	mm	-	-	0.0
out	SowingAttempts	Number of sowing attempts	INT	1	-	-	0
out	SowingDOY	DOY when DoSow occurs	INT	1	-	-	0
out	TotalDays	Counts total running days. Used to cyclically populate PreviousDaysPrecipitation with the last precipitation values.	INT	d	-	-	0

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

// 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 reset();

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) - ReSowManagement