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iMOD User Manual version 4.4 (html)


12Theoretical background

In this chapter the iMOD-packages are described in detail. In the table below these iMOD-packages are listed by their acronyms including their MODFLOW-equivalent (if available). Also any differences between an iMOD-package and its MODFLOW-equivalent is described.

iMOD Key

Req.

Description

section nr

Equivalent
MODFLOW package

CAP

Unsaturated zone package

Section 12.1

n.a.

BND

x

Boundary conditions (compulsory)

Section 12.2

BAS

SHD

x

Starting heads (compulsory)

Section 12.3

BAS

KDW

Transmissivity

Section 12.4

LPF/BCF

VCW

Vertical resistances

Section 12.5

LPF/BCF

KHV

Horizontal permeabilities

Section 12.6

LPF/BCF

KVA

Vertical anisotropy for aquifers

Section 12.7

LPF/BCF

KVV

Vertical permeabilities

Section 12.8

LPF/BCF

STO

Storage coefficients

Section 12.9

LPF/BCF

SSC

Specific storage coefficients

Section 12.10

LPF/BCF

TOP

Top of aquifers

Section 12.11

DIS

BOT

Bottom of aquifers

Section 12.12

DIS

PWT

Perched-water table package

Section 12.13

n.a.

ANI

Horizontal anisotropy package

Section 12.14

LPF

HFB

Horizontal flow barrier package

Section 12.15

HFB

IBS

Interbed Storage package

Section 12.16

IBS

SFT

Streamflow thickness package

Section 12.17

n.a.

WEL

Well package

Section 12.18

WEL

DRN

Drainage package

Section 12.19

DRN

RIV

River package

Section 12.20

RIV

EVT

Evapotranspiration package

Section 12.21

EVT

GHB

General-head-boundary package

Section 12.22

GHB

RCH

Recharge package

Section 12.23

RCH

OLF

Overland flow package

Section 12.24

n.a.

CHD

Constant-head package

Section 12.25

CHD/BAS

FHB

Flow Head Boundary package

Section 12.26

FHB

ISG

Segment package

Section 12.27

RIV/DRN

SFR

Surface water Flow Routing package

Section 12.28

SFR

LAK

Lake package

Section 12.29

LAK

PST

Parameter estimation package

Section 12.33

n.a.

MNW

Multi-Node Well package

Section 12.30

MNW

UZF

Unsaturated Zone package

Section 12.31

UZF

PKS

Parallel Krylov Solver

Section 12.32

n.a.