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iMOD User Manual version 4.4 (html)


10.12Data Set 11: Input file assignment

Data Set 11

ILAY,FCT,IMP,FNAME

ILAY

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: PWT, 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 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 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 appropriate model layer(s)

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