Stakeholders (e.g. water companies, water boards, industrial users) and decision makers (e.g. municipalities, provincial governments) are increasingly participating in jointly developing numerical groundwater flow models that cover land areas of common interest. The reason for this is twofold:
1. minimize the undesired high costs of repeatedly developing individual - partly overlapping - models, and
2. facilitate stakeholder engagement participation in the model building process.
In an effort to facilitate this the concepts of MODFLOW were used by Deltares to develop iMOD (interactive MODeling) to:
1. provide the necessary functionalities to manage very large groundwater flow models, including interactive generation of sub-models with a user-defined (higher or lower) resolution embedded in- and consistent with the underlying set of model data, and
2. facilitate stakeholder participation during the process of model building.
A major difference, compared to other conventional modeling packages, is the generic geo-referenced data structure that for spatial data may contain files with unequal resolutions and can be used to generate sub-models at different scales and resolutions applying up- and down-scaling concepts. This is done internally without creating sub-sets of the original model data. For modelers and stakeholders, this offers high performance, flexibility and transparency.