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*****************************************************************
* SAWAIN.DAT *
* *
* INPUT DATA FILE FOR SOIL WATER BALANCE MODEL SAWAH *
* *
*****************************************************************
** Code to recognize correctness of data file: this file for
* SAHEL water balance
SCODE = 'SAWAH'
**************************************************************
* User defined OPTION switches; all integers; dimensionless
* NB !!!! Switches SWIT1, SWIT2, SWIT4 are not user-defined;
* there are assigned values at lower level CALLs
**************************************************************
*----------------------------------------------------------------
* SWIT3 : conductivity function option switch
* NB ! at SWIT9=2, not all combinations of SWIT3 and SWIT8
* are allowed; see comments at SWIT9
* SWIT3=1: simple Rijtema
* SWIT3=2: extended Rijtema
* SWIT3=3: Van Genuchten
* SWIT3=4: Power function
*----------------------------------------------------------------
SWIT3=3
*----------------------------------------------------------------
* SWIT5 : time step option switch
* SWIT5=1: Variable time step
* SWIT5=2: Fixed time step; DTFX must be specified
*----------------------------------------------------------------
SWIT5 = 1
*----------------------------------------------------------------
* SWIT6 : soil moisture initialization option switch
* SWIT6=1: initial soil moisture in hydrostatic equilibrium
* with groundwater
* SWIT6=2: initial soil moisture entered as specified values;
* WCLQTM must be specified
* SWIT6=3: initial soil moisture at wilting point
*----------------------------------------------------------------
SWIT6 = 2
*----------------------------------------------------------------
* SWIT7 : lower boundary condition option switch:
* SWIT7=1: pressure head at lower boundary derived from
* groundwater level (specified in ZWTB)
* SWIT7=2: free drainage
*----------------------------------------------------------------
SWIT7 = 1
*----------------------------------------------------------------
* SWIT8 : moisture characteristic option switch; active at
* both values of SWIT9
* NB ! at SWIT9=2, not all combinations of SWIT3 and SWIT8
* are allowed; see comments at SWIT9
* SWIT8=1: Driessen
* SWIT8=2: Van Genuchten
* SWIT8=3: linear interpolation on log scale
*----------------------------------------------------------------
SWIT8=2
*----------------------------------------------------------------
* SWIT9 : soil characterization option switch
* SWIT9=1: conductivity and moisture characteristic specified
* by user through parameter values in this file;
* all combinations of SWIT3 and SWIT8 are allowed
* SWIT9=2: conductivity and moisture characteristic derived by
* SAWAH from soil type number only; soil type number
* to be specified in TYL.
* Only certain combinations of SWIT3 and SWIT8 are
* allowed at this value of SWIT9:
* SWIT3=1 and SWIT8=1 (simple Rijtema conductivity
* combined with Driessen moisture characteristic)
* SWIT3=2 and SWIT8=1 (extended Rijtema conductivity
* combined with Driessen moisture characteristic)
* SWIT3=3 and SWIT8=2 (Van Genuchten conductivity
* combined with Van Genuchten moisture characterisic)
* NB1 ! for SWIT9=2, SWIT3=4/5 cannot be used
* NB2 ! for SWIT9=2, SWIT8=3/4 cannot be used
*----------------------------------------------------------------
SWIT9=1
******************* time discretization **********************
* fixed time step; DTFX is only active when SWIT5=2:
DTFX = 0.1 ! units: d
* relative minimum; active in all options:
DTMIN = 0.0005 ! units: d
* absolute maximum; active in all options:
DTMX1 = 0.1 ! units: d
* Warning: too large DTFX (at SWIT5=2) and too large
* DTMIN (SWIT5=1) will lead to oscillations
* in simulated water contents. Both can be
* 0.01 d or larger for 'slow' soils (KST<10
* cm/d), but should be decreased to 0.001 d
* or lower for highly permeable soil (KST>
* 100 cm/d). (Values are based on TKL=0.1 m
* for all compartments; for smaller TKL,
* smaller DTFX and DTMIN are needed.
* Check temporal behaviour of output water
* contents.
**************************************************************
***************** space discretization ***********************
* number of compartments; maximum is 10; active in all options
NL=9
* Thickness of soil compartments; the dimension of TKL in this
* data file should be equal to NL; active in all options:
TKL = 9*0.10 ! units: m
**************************************************************
***************** initialization of state ********************
* initial depth of surface water layer; active in all options
WL0QTI = 0.10 ! units: m
* initial depth of evaporation front; active in all options
ZEQTI = 0.0 ! units: m
* initial moisture content; active only at SWIT6=2;
*NB ! values should not exceed WCST as specified in this file
* (for SWIT9=1) or in data base (for SWIT9=2); the dimension
* of WCLQTM should be equal to NL
WCLQTM = 3*0.52, 3*0.55, 2*0.61, 0.64 ! units: -
**************************************************************
*********** this section can be ignored if SWIT9=2 *********
*************** soil hydraulic conductivity *****************
********* 'parameter' section: active only for SWIT9=1 *******
*NB ! The dimension of all parameters in this section should
* be equal to NL;
* active for all options SWIT3=1/2/3/4/5:
* saturated hydraulic conductivity
KST = 2*127.0, 0.03, 3*35.0, 2*103.0, 42.0
* active for options SWIT3=1/2: simple and extended Rijtema
KMSA1 = 9*0.03 ! units: 1/cm
* active only for option SWIT3=2: extended Rijtema
KMSA2 = 9*3.6 ! units: (cm**2.4)/d
KMSMX = 9*300. ! units: cm
* active only for option SWIT3=3: parameter for Van Genuchten
VGN = 3*1.119, 3*1.095, 2*1.076, 1.073 ! n parameter (-)
* active only for option SWIT3=4: parameter for power function
PN = 9*-2. ! units: -
********** end of conductivity 'parameter' section ***********
**************************************************************
************* this section can be ignored if SWIT9=2 ********
**************** soil moisture characteristic ****************
****** 'parameter' section: active only for SWIT9=1 **********
* active for all options SWIT8=1/2/3/4:
* water content at saturation; volume fraction
WCST = 3*0.52, 3*0.55, 2*0.61, 0.64 ! TEMPORAL USE
WCFC = 3*0.35, 3*0.36, 2*0.40, 0.43
WCWP = 3*0.19, 3*0.20, 2*0.23, 0.25
WCAD = 9*0.10
* SOIL TEXTURE AND BULK DENSITY, this section is need for actual root growth simulation
SANDX = 3*0.25, 3*0.20, 2*0.18, 0.15 ! soil sand content
CLAYX = 3*0.35, 3*0.40, 2*0.50, 0.55 ! soil clay content
BD = 3*1.27, 3*1.19, 2*1.03, 0.95 ! soil bulk densiTY
PLOWPAN= 30.0 ! THE DEPTH OF PLOWPAN (CM), NEGATIVE VALUE INDICATES NO PLOWPAN
* Soil chemical properties needed soil C&N dynamics
SOC = 2*3831.,2044.,4529.,832.6,273.8,28.6,14.0,2.8
SON = 2*191.6,113.6,283.,55.5,22.8,2.6,1.3,0.25
SNH4X = 5.75,4.79,2.27,5.67,1.11,0.46,0.052,0.026,0.005
SNO3X = 2.9,2.4,1.3,2.8,0.55,0.23,0.026,0.013,0.0025
* Fresh organic carbon and nitrogen input at soil layers
*FORGANC =200.0,150.0,100.0,50.0,5*0.0 !Fresh organic residue carbon input from previous crop at kg C/ha
*FORGANN =4.0,3.0,2.0,1.0,5*0.0 !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 =
* active only for option SWIT8=1: parameter for Driessen
MSWCA = 9*0.01 ! units -
* active only for option SWIT8=2: parameters for Van Genuchten
VGA = 3*0.127, 3*0.047, 2*0.078, 0.032 ! a parameter (cm-1)
VGL = 3*-6.2, 3*-0.6, 2*-4.9, -11.1 ! l parameter (-)
VGR = 9*0.01 ! residual water content (-)
* active only for option SWIT8=3: parameters for
* interpolation. To be specified: the pF values corresponding
* to eleven given values of relative moisture content:
* PFWC00 for relative moisture content 0.0
* PFWC01 for relative moisture content 0.1, .... etc
* PFWC10 for relative moisture content 1.0
* NB1 ! Each line contains NL positions, one for each
* compartment
* NB2 ! All values in the first line (PFWC00) should be 7.0
* All values in the last line (PFWC10) should be 0.0
* For any given position (=compartment), all values
* should decrease monotonically from PFWC00 down to
* PFWC10
PFWC00=9*7.
PFWC01=5*6.3, 2*6.4, 2*6.5
PFWC02=5*5.5, 2*5.8, 2*6.0
PFWC03=5*4.8, 2*5.3, 2*5.5
PFWC04=5*4.1, 2*4.8, 2*5.0
PFWC05=5*3.3, 2*4.0, 2*4.4
PFWC06=5*2.48, 2*3.90, 2*3.9
PFWC07=5*1.70, 2*3.33, 2*3.4
PFWC08=5*1.27, 2*2.76, 2*2.82
PFWC09=5*0.76, 2*1.48, 2*2.05
PFWC10=9*0.0
***** end of moisture characteristic 'parameter' section *****
**************************************************************
********** this section can be ignored if SWIT9=1 ***********
************ hydraulic soil properties by soil type **********
******** 'soil type' section: active only for SWIT9=2 *******
* If SWIT9=2, physical soil characteristics are assigned to
* each compartment by only defining the soil type in each
* compartment. SAWAH makes use of a small data base,
* containing consistent sets of parameter values, tabulated in
* DRSAWA. See above comments at SWIT3, SWIT8 and SWIT9 in this
* file. For available types, see listing DRSAWA in manual .
* The dimension of TYL in this data file should be equal to NL
TYL = 1, 1, 2, 2, 6*2 ! units: -
***************** end of 'soil type' section ****************
**************************************************************
****************** other soil parameters *********************
***************** active in all options *********************
* effective soil vapor diffusivity:
CSC2 = 0.1 ! units: cm2/d
* soil evaporation parameters:
CSA = 0.005 ! units: cm2/d
CSB = 1.0 ! units: -
* maximum layer of surface water WL0
WL0MX = 0.25 ! units: m
* index of compartment containing drain tubes/moles
* NB ! If no artificial drainage, set to zero !!!
IDRAIN = 0 ! units: -
* Maximum rooting depth
ZRTMS = 1.00 ! units: m
**************************************************************
********************Groundwater depth ************************
*************** active in all options ************************
* Groundwater will be ignored only at the simultaneous
* occurrence of two conditions:
* (1) SWIT7=2
* (2) groundwater depth as specified here is deeper than
* the lower profile boundary (=sum of TKL)
* If SWIT7=2, it is possible that groundwater is ignored only
* part of the simulated time due to part-time fulfillment of
* condition (2).
* The groundwater level is prescribed by means of a table
* containing datapoints in the form (DAY,LEVEL)
* The maximum number of datapairs is 365. If not all
* daynumbers are entered, SAWAH will interpolate between data
* points - linear.
ZWTB = 1.,0.20,
366.,0.20
*---------------------------------------------------------------*
* 10. re-initialization
*---------------------------------------------------------------*
* Initial ponded water depth and water contents may be reset:
* Ponded water depth: to minimum of WL0I and WL0MX
* Water contents in all soil layers: to saturation value
* For direct seeded rice, this happens at emergence, for transplanted
* rice, this happens at transplanting (see TIMER.DAT file)
* Re-initialize switch RIWCLI is YES or NO
RIWCLI = 'NO'
*RIWCLI = 'YES'
*---------------------------------------------------------------*
* 11. Observations/measurements
* Switches to force observed water contents 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 =
* TO BE FILLED-IN (OPTIONAL)
** 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
* Table for interpolation of water content between soil layers for
* those layers for which no observations were made: first number is
* the soil layer for which interpolation needs to be done, the second
* is the number of the underlying soil layer, the third is the number
* of the overlying soil layer. No interpolation is performed when all
* three numbers are the same:
WCLINT = 1, 1, 1,
2, 2, 2,
3, 3, 3,
4, 4, 4,
5, 5, 5,
6, 6, 6,
7, 7, 7,
8, 8, 8,
9, 9, 9
* 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)
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