LOWBAL file format
You can copy this sample file to create your own lowbal soil file. Just change the values, then copy and paste as an ordinary text file.
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* LOWBALIN.DAT; Soil parameters for the water balance LOWBAL *
* for puddled, lowland rice soils. *
*******************************************************************
** Code to recognize correctness of data file: this file for
* LOWBAL water balance
SCODE = 'LOWBAL'
WL0MXI = 100.00 ! Bundheight (mm)
TKLPI = 200.00 ! Thickness puddled layer (mm)
* Switch for percolation rate: 1 = fixed value; 2 = value changing in time
PSWITCH = 1
* If PSWITCH = 1: give fixed percolation rate FIXPERC
FIXPERC = 6.00 ! Fixed percolation rate (mm/d)
* If PSWITCH = 2; give percolation rate (mm/d) as function of calendar day
PTABLE =
1., 6.0, !First number is calendar day, second is percolation rate)
26., 6.0,
100., 3.0,
366., 3.0
SSOILIN = 10. ! Fixed seepage inflow rate (mm/d)
SSOILOUT = 5. ! Fixed seepage outflow rate (mm/d)
DDR = 2000.00 ! Deep drainage rate of the subsoil (mm/d)
WL0I = 10.00 ! Initial depth of ponded water layer (mm)
SHRINK = 1. ! Linear shrinkage factor (-)
WCCRAC = 0.01 ! Water content puddled layer at which cracks
! penetrate the compacted (plough) layer (cm3/cm3)
* All water contents below are measured after drying out of puddled layer
* Data from Wopereis (1992 experiments at IRRI)
WCSTP = 0.52 ! Water content at saturation, puddled layer (cm3/cm3)
WCFCP = 0.48 ! Water content at field capacity, puddled layer (cm3/cm3)
WCWPP = 0.21 ! Water content at wilting point, puddled layer (cm3/cm3)
WCADP = 0.01 ! Water content at air-dryness, puddled layer (cm3/cm3)
*----------------------------------------------------------------
* Soil physic and chemical properties for root growth and dynamics
* Physics are the average of profile, chemical are the accumulation of profile
SANDX = 0.23 ! Fraction
CLAYX = 0.45 ! Fraction
BD = 1.21 ! g/cm3
SOC = 15386.8 ! kg C/ha
SON = 862.25 ! kg N/ha
SNH4X = 20.133 ! kg N/ha
SNO3X = 10.22 ! kg/ha
* Fresh organic carbon and nitrogen input at soil layers
* FORGANC =350.0 !Fresh organic residue carbon input from previous crop at kg C/ha
* FORGANN =4.0 !Fresh organic residue nitrogen input from previous crop at kg N/ha
* If the carbonhydrate and cellulous fractions are available in soil residue carbon input
* otherwise, the default values will be used
*FCarboh =
*FCellulo =
*RCarboh =
*RCellulo =
*---------------------------------------------------------------*
* Observations/measurements
* Switches to force observed water content in water balance
*---------------------------------------------------------------*
* WCL1_OBS, WCL2_OBS,...WCL10_OBS: Observed soil water contents
* in layer 1, 2, ..., 10. Format: year, day number, water content
* Not obligatory to give data
WCL1_OBS =
1992., 1., 0.40,
1992., 15., 0.40,
1992., 75., 0.30,
1992., 366., 0.30
** Parameter to set forcing of observed water content yes (2) or no (0)
** during simulation (instead of using simulated values)
WCL1_FRC = 0 ! No forcing
*WCL1_FRC = 2 ! Forcing
* MSKPA1_OBS, MSKPA2_OBS,...MSKPA10_OBS: Observed soil water contents
* in layer 1, 2, ..., 10. Format: year, day number, water content
* Not obligatory to give data
*MSKPA1_OBS =
* TO BE FILLED-IN (OPTIONAL)