Presentation by Tess Davids (Deltares, Netherlands) at the Hydrology Suite User Days (Day 3) - Groundwater modelling, during the Delft Software Days - Edition 2023 (DSD-INT 2023). Thursday, 30 November 2023, Delft.

1. Tess Davids, presenting on behalf of the iMOD team
30-11-2023
iMOD and new developments

2. iMOD
iMOD is Open Source Software and facilitates groundwater
modelling using MODFLOW
DSD-INT
2023
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Hydrology
User
Days
3

3. MODFLOW 6: new opportunities to simulate groundwater flow…
Regular, structured grids (DIS) as well as unstructured (DISV, DISU) and multi model simulations
+ +
DSD-INT
2023
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Hydrology
User
Days
4

4. Release of two iMOD product lines
DSD-INT
2023
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Hydrology
User
Days
5

5. 2 iMOD product lines
1. iMOD 5 (developments 2007-2021)
− Can be used for iMODFLOW and iMOD-WQ and limited functionality MODFLOW 6
− Development limited to bugfixes
2. iMOD Suite (2021 - ∞)
− Includes all new developments
− Supports structured and unstructured grids MODFLOW 6 and pre- and post
processing iMODFLOW and iMOD-WQ
− Now mainly (still) suitable for experienced modelers with experience in scripting.
DSD-INT
2023
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Hydrology
User
Days
6

6. Professionalization product development – Hydrology Team
• Increase cooperation between different software
• Adopt new way of working: Agile

7. iMOD Suite – iMOD Python
A collection of Python tools for groundwater modeling and MODFLOW input & output
• Preparing: e.g. rasterizing river shapefiles
• Formatting: produce MODFLOW input
• Extracting and post-processing: compare heads with piezometers, compute water balance
• Visualization: time series, map, cross-sections, 3D
DSD-INT
2023
|
Hydrology
User
Days
8

8. iMOD Suite – iMOD Python
A collection of Python tools for groundwater
modeling and MODFLOW input & output
• Preparing: e.g. rasterizing river shapefiles
• Formatting: produce MODFLOW input
• Extracting and post-processing: compare
heads with piezometers, compute water
balance
• Visualization: time series, map, cross-
sections, 3D
Part of a much broader set of tools for
reproducible groundwater modeling
DSD-INT
2023
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Hydrology
User
Days
9

9. In QGIS:
− Planar (map) view
In iMOD QGIS plugin:
− Cross-sections
− Timeseries
In iMOD 3D viewer
− 3D viewing
10
iMOD Suite – iMOD QGIS plugin and 3D viewer
Visualisation of unstructured data
Open Source
DSD-INT
2023
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Hydrology
User
Days

10. iMOD Suite – iMOD Coupler
Is a shell for coupling hydrological kernels
• Separated source codes (no alterations within e.g. MF6)
• Robust, integrated testing
• Uses extension of basic modelling interface (XMI)
• Adding different drivers
− MODFLOW 6 – MetaSWAP
− MODFLOW 6 – MetaSWAP – D-Flow FM (Delft3D FM Suite 1D2D)
− MODFLOW 6 – RIBASIM
11
DSD-INT
2023
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Hydrology
User
Days
Presentation: Coupling MODFLOW to RIBASIM (Huite Bootsma)

11. Other products
DSD-INT
2023
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Hydrology
User
Days
Python packages:
Xugrid
• Xarray extension to work with 2D unstructured
grids
Pandamesh
• Translates geospatial vector data (points,
lines, or polygons) to unstructured meshes
QGIS Tim
• A QGIS plugin for analytic elements: TimML
and Ttim
12

12. iMOD Suite new developments – iMOD Python
Highlights new functionality until December 2023
• MODFLOW 6 package checks
• Regridding, clipping, and masking of MODFLOW 6 models
• With simulation.open_head you can open heads from a simulation
• Define wells using x,y,z and HFB’s based on geopandas lines
Coming soon: partitioning for MODFLOW 6 parallel models
Changelog: https://deltares.gitlab.io/imod/imod-python/api/changelog.html
DSD-INT
2023
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Hydrology
User
Days
Presentation: iMOD Suite update (Joeri van Engelen) 13

13. iMOD Suite new developments – iMOD QGIS plugin
and 3D Viewer
• Save load colourmaps
• Reading IDF’s
DSD-INT
2023
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Hydrology
User
Days
14

14. iMOD developments roadmap ‘24
DSD-INT
2023
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Hydrology
User
Days
iMOD Suite
iMOD Python
• Continue support for iMOD5 users / backward compatibility (Q1 / Q2)
• Finish up multi-model support
iMOD Coupler
• Coupling MODFLOW 6 – RIBASIM (River basin simulation)
• Multi-model support
iMOD QGIS plugin and 3D viewer
• No concrete plans
15

15. info@deltares.nl
@deltares linkedin.com/company/deltares
www.deltares.nl
@deltares facebook.com/deltaresNL