iMOD User Manual version 5.2 (html) — Data Set 11: Input file assignment

10.12Data Set 11: Input file assignment

Data Set 11	ILAY,FCT,IMP,FNAME
ILAY Note this parameter does not need to be defined for the CAP and PWT package	This represents the model layer to which the input data assigns to. For the package: BND, SHD, KDW, VCW, STO, TOP, BOT and ANI, it is not sustained to assign more input data to identical model layers. However, multiple assignments to identical model layers are sustained for the other packages: HFB, WEL, DRN, RIV, EVT, GHB, RCH, OLF, CHD and ISG. ILAY can be used as follows:
	\(>\)0	Expresses the model layer number to which the module and/or package is assigned to
	=0	Automatic allocation of model layers to packages. It is compulsory to have included the TOP and BOT package (see Data Set 8). Only the following packages are affected by ILAY=0:
		HFB	The given elevation in a 3-D GEN file (see section 9.11) will be used to determine the actual model layer, use the iMODBatch function GEN2GEN3D to construct those 3-D GEN files (see section 8.4.2)
		WEL	Given IPF should contain the records, X,Y,Q,Z1,Z2. Z1 and Z2 will be used to assign well strength to the appropriate model layer(s)
		DRN	The given elevation will be used to determine the actual model layer
		RIV	Both, the given stage and bottom elevation will be used to determine the model layer(s). The conductance is distributed over the intersected layer(s) depending on the fraction of the layer that is penetrated. The formula for penetrated layer {i} is CD{i}=LCCDTLP{i} where: CD{i} = the conductance for layer {i}, LC = the ’De Lange’ conductance correction (by default 1.0 and can be activated with keyword IFVDL in batch function RUNFILE, see section 8.7.5), CD = the conductance (lengthwidth/resistance), TLP{i}* = the fraction of the layer that is penetrated.
		GHB	The given elevation will be used to determine the model layer.
		OLF	The given elevation will be used to determine the model layer.
		ISG	Both, the given stage and bottom elevation will be used to determine the appropriate model layer(s). Moreover, the specified wetted perimeter will be used to adjust conductances.
	\(<\)0	Assign package to the highest active model cell with a BND-value \(>\) 0 (see Data Set 10, Key=BND). Every package (except the CHD package) can be affected by ILAY\(<\)0; package however, are not supported.

FCT	The multiplication factor for the input data (nodata values excluded). It is possible to use the FCT parameter to assign mean values, e.g. apply FCT=0.5 for conductance’s for rivers in summer and winter periods. Moreover, it is possible to compute a weighed mean of two periods within the package assigned to the identical model layer.
IMP	Addition for the input data (nodata values excluded). Mathematical order is that multiplication (FCT) comes before the addition (IMP).
FNAME	The name of the input file, although it is sustained, it is preferable to note the FNAME with an absolute path (e.g. c:\fname) rather than a relative path (..\fname). The following format of these files are assigned to the existing package:
	Format	Module/package
	IDF	CAP,BND,SHD,KDW,VCW,KHV,KVV,STO,PWT,ANI,CHD, DRN,RIV,EVT,GHB,RCH,OLF,IBS,TOP,BOT,KVA
	IPF	WEL
	GEN	HFB
	ISG	ISG
	In case the input parameters are constant over the entire modeling domain, a constant value can be given. An exception to this is made for the packages WEL,HFB and ISG packages