Deltares/imod-python

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🐍🧰 Make massive MODFLOW models

Stars: 41
Forks: 12
Open beginner issues: 1
Indexed issues: 179
Avg merge: 21h 8m
Merged PRs (30d): 1

Dominant language: Python
License: MIT
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Beginner friendly Everything

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179 issues indexed so far

Publish build artifacts to Sonatype Nexus (PyPI channel: imod-python-releases) Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

Deltares/imod-python#1911 · Opened Aug 27, 2026
Make python dependencies pypi only Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

Deltares/imod-python#1910 · Opened Aug 27, 2026
Test whether SprinklingPoints produces what it should and add regression test. Open

backwards_compatibility needs tests

Deltares/imod-python#1908 · 1 assignee · Opened Aug 20, 2026
[Bug] - imod.prepare.reproject does not reproject to new grid size Open

bug documentation

Deltares/imod-python#1905 · 3 comments · 1 assignee · Opened Aug 12, 2026
[Bug] - River.from_imod5_data unacceptably slow for IBRAHYM iMOD5 test Open

backwards_compatibility bug performance

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Deltares/imod-python#1892 · Opened Jul 29, 2026
Add dependency cooldown to pixi toml Open

ci

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

Deltares/imod-python#1891 · Opened Jul 28, 2026
[FEATURE] - find successor for ISG format Open

backwards_compatibility enhancement

Deltares/imod-python#1869 · 1 comment · 1 assignee · Opened Jun 18, 2026
[FEATURE] - Onduidelijke fout bij verkeerde nodata waarde in beregenings IPF's Open

backwards_compatibility enhancement

Difficulty 3/5 1-2 days Newbie friendliness 52/100

Deltares/imod-python#1864 · 1 comment · Opened Jun 16, 2026
Onduidelijke error bij fout in aantal definities keys Open

backwards_compatibility bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

Deltares/imod-python#1860 · 2 comments · Opened Jun 12, 2026
[FEATURE] - Add second option of meteo input for MetaSWAP: meteo stations Open

backwards_compatibility enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

Deltares/imod-python#1853 · Opened Jun 5, 2026
[Help request] Suggestion how to keep Faults (HFB) and aquifer/aquitard parameters together during regridding Open

backwards_compatibility question

Difficulty 5/5 Over a week Newbie friendliness 30/100

Deltares/imod-python#1851 · 1 comment · Opened Jun 4, 2026
Support `CONTINUE` option in `Modflow6Simulation` Open

enhancement good first issue

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

Deltares/imod-python#1843 · Opened May 19, 2026
[FEATURE] - 'Open' MF6sim after running to facilitate access to functions like open_head and the like Open

Deltares enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Deltares/imod-python#1838 · 1 comment · 1 reaction · Opened May 11, 2026
Compare Peelvenen model MODLFLOW6 input with iMOD5 Open

backwards_compatibility

Deltares/imod-python#1834 · 4 comments · 1 assignee · Opened May 7, 2026
[Bug] - PRJ period startdates not treated by iMOD Python as in iMOD5 Open

backwards_compatibility bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Deltares/imod-python#1828 · Opened Apr 30, 2026
[FEATURE] - Support optional columns MetaSWAP Open

backwards_compatibility enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Deltares/imod-python#1827 · 1 comment · Opened Apr 29, 2026
[FEATURE] - Allocate RIV, DRN, RCH: drop unused layers Open

enhancement performance

Deltares/imod-python#1821 · 1 comment · 1 assignee · Opened Apr 23, 2026
[Bug] - MetaSWAP area computed differently from iMOD5 Open

backwards_compatibility bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Deltares/imod-python#1811 · 1 comment · Opened Apr 15, 2026
[FEATURE] - Add cleanup methods for static packages Open

backwards_compatibility enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

Deltares/imod-python#1809 · Opened Apr 14, 2026
[FEATURE] - Zone budgets for unstructured data Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

Deltares/imod-python#1792 · 1 reaction · Opened Mar 23, 2026
Mask topsystem packages where IBOUND == -1 Open

backwards_compatibility enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

Deltares/imod-python#1787 · 2 comments · Opened Mar 17, 2026
Add HPC file support to simulation name file options for extended MODFLOW 6 Open

enhancement

Deltares/imod-python#1785 · 1 assignee · Opened Mar 17, 2026
Refactor: Move splitting logic to separate module and create additional interfaces Open

refactor

Difficulty 4/5 3-5 days Newbie friendliness 28/100

Deltares/imod-python#1783 · Opened Mar 12, 2026
Keyword IACTIVE in the iMOD5 PRJ file is not supported Open

backwards_compatibility documentation

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

Deltares/imod-python#1782 · 1 comment · Opened Mar 12, 2026
Refactor time handling utilities now that we have pandas 3 Open

refactor

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Deltares/imod-python#1773 · 3 comments · Opened Feb 11, 2026
[Question] Comparison stationary heads for IMOD Python run vs IMOD Batch function Open

Deltares/imod-python#1766 · 16 comments · 1 assignee · Opened Jan 23, 2026
[DOCUMENTATION] - improve searchability and visibility of Regrid instructions Open

documentation

Deltares/imod-python#1765 · 1 reaction · 1 assignee · Opened Jan 22, 2026
Skip (for now) processing species-data when opening iMOD PRJ data file Open

backwards_compatibility

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

Deltares/imod-python#1763 · Opened Jan 21, 2026
[FEATURE] - Create VTK exporters Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

Deltares/imod-python#1759 · 3 comments · Opened Jan 14, 2026
[FEATURE] - HFB support for iMOD5 models with linearrings Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Deltares/imod-python#1757 · Opened Jan 12, 2026
[FEATURE] - Add GWT LKT (Lake Transport) package to the API Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 45/100

Deltares/imod-python#1754 · Opened Jan 9, 2026
[FEATURE] - Add reader for LAK STAGE FILEOUT binary file Open

enhancement

Deltares/imod-python#1753 · 7 comments · 1 assignee · Opened Jan 9, 2026
Refactor ``clip_box`` logic to clarify inner workings Open

refactor

Difficulty 5/5 Over a week Newbie friendliness 35/100

Deltares/imod-python#1751 · Opened Jan 6, 2026
[Bug] - Purged empty packages are still be present in the SSM package Open

bug clipping Deltares

Difficulty 3/5 1-2 days Newbie friendliness 35/100

Deltares/imod-python#1745 · Opened Dec 19, 2025
[FEATURE] - OutputControl for only specific stress periods. Open

Deltares enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Deltares/imod-python#1741 · 1 comment · Opened Dec 16, 2025
[FEATURE] - Modflow6Simulation.clip_box should be able to adapt InitialConditions too. Open

clipping Deltares enhancement

Difficulty 4/5 3-5 days Newbie friendliness 42/100

Deltares/imod-python#1740 · Opened Dec 16, 2025
[Bug] - Well.clip_box doesn't work with dask arrays Open

bug clipping Deltares

Difficulty 3/5 1-2 days Newbie friendliness 48/100

Deltares/imod-python#1737 · 1 comment · Opened Dec 15, 2025
[Bug] - Cleanup method doesn't work with concentrations Open

bug Deltares triage

Difficulty 4/5 3-5 days Newbie friendliness 25/100

Deltares/imod-python#1731 · Opened Dec 8, 2025
[FEATURE] - Function to compute fluxes based on previously computed heads. Open

Deltares enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

Deltares/imod-python#1730 · 1 comment · Opened Dec 8, 2025
[FEATURE] - imod.mf6.open_hds and imod.mf6.open_cbc should be able to merge split domains as well Open

Deltares enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

Deltares/imod-python#1728 · Opened Dec 8, 2025
[FEATURE] - UGRID support in Visualization module Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

Deltares/imod-python#1727 · 2 comments · Opened Dec 8, 2025
Investigate and either fix or quell zarr.zip warnings Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

Deltares/imod-python#1707 · 2 comments · Opened Oct 31, 2025
[FEATURE] - Modflow6Simulation.split: warn on spatially unchunked input Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 28/100

Deltares/imod-python#1691 · Opened Oct 7, 2025
`Modflow6Simulation.from_file()` or even Package instantiation could always eagerly materialize all non-spatial data Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

Deltares/imod-python#1689 · 1 comment · 1 reaction · Opened Oct 1, 2025
Why `expand_transient_auxiliary_variables` Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

Deltares/imod-python#1687 · Opened Sep 26, 2025
Modflow6Simulation.split assumes unique names between transport and flow models Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

Deltares/imod-python#1685 · Opened Sep 24, 2025
Modflow6Simulation.split example has n_partitions instead of npartitions Open

documentation

Difficulty 1/5 Under an hour Newbie friendliness 68/100

Deltares/imod-python#1684 · Opened Sep 22, 2025
[FEATURE] - Enforce descending y-coords Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

Deltares/imod-python#1671 · Opened Sep 5, 2025
[FEATURE] - Add reporting functionality Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

Deltares/imod-python#1668 · Opened Sep 5, 2025
Create TeamCity pipelines that run on a Linux agent Open

Deltares/imod-python#1630 · 1 assignee · Opened Aug 12, 2025

Deltares/imod-python

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