This chapter describes:
• Section 2.1: How to obtain the Deltares-software executables of iMOD.
• Section 2.2: How to install iMOD.
• Section 2.3: How to get and install third-party MPI software.
iMOD 4.3 includes the new Parallel Krylov Solver (PKS) Package. This package facilitates running (large) iMOD models on Windows-based multi-core computers potentially resulting in a drastic reduction of runtimes. The PKS-package is a new alternative next to the current single-core PCG-solver. The modeller of course is not required to apply the new PKS-package, however, in iMOD 4.3 it is easy to switch between the single- and multi-core solver.
In iMOD 4.3 the LAK-, MNW-, PST-, SFR- and UZF-packages are not supported by the PKS-package; when an iMOD-model contains one or more of these package the single-core PCG-solver package has to be used.
The PKS-package can be used on Windows-based 64-bits systems only.
Please note that the PKS package can be used for iMOD models that contain the MetaSWAP-concept. This potentially gives another boost to the speed of model simulations containing an iterative state-of-the-art coupling between the saturated and unsaturated zone.
The PKS package uses Message Passing Interface (MPI) software. Hence, prior to using the PKS-package MPI-software should be installed on your computer too; Section 2.3 describes how to get and install the MPI-software. However, if you are not going to use the PKS-package you are not required installing the MPI software and you can skip Section 2.3 all together.
The other sections focus on how to operate iMOD and how new users can familiarize themselves with iMOD:
• Section 2.4: a 3D-appetizer.
• Section 2.8: how to specify your colours.
Additionally, the Tutorials in Chapter 11 provide a selection of iMOD case studies to introduce the program’s functions. New iMOD users are advised to use the Tutorials to familiarize themselves with iMOD.