Specifications
Two questions decide whether a modelling tool is usable. Can I build this package through the interface, and will the model I already have survive being opened and written back? The tables below answer both, per engine, including where the answer is no.
How to read this
- Build
- Where the package is authored from scratch. Most are built in the properties panel; the grid comes from the meshing tools, and time series are authored as curves and attached to any target.
- Existing model
- What happens to a package GWlink did not create. Native means it is imported as a real link, editable afterwards. Preserved means the original file is carried through and written back unchanged, without being interpreted. Rejected means the import stops and names the offending feature.
- Nothing is lossy
- A package that imported and ran but quietly dropped information would be the worst of the three, because you would never find out. GWlink treats that state as a defect rather than a limitation: no package sits in it, in any engine. An import either carries your data or tells you why it cannot.
MODFLOW 6
| Package | Build | Existing model |
|---|---|---|
| CHD | Interface | Native |
| DISU | Grid tools | Native |
| DRN | Interface | Native |
| EVT | Interface | Native |
| GHB | Interface | Native |
| GNC | — | Preserved |
| HFB | Interface | Native |
| IC | Interface | Native |
| IMS | Interface | Native |
| MAW | Interface | Native |
| NPF | Interface | Native |
| OBS | Interface | Native |
| OC | Interface | Native |
| RCH | Interface | Native |
| RIV | Interface | Native |
| SFR | Interface | Native |
| STO | Interface | Native |
| TS6 | Curves | Native |
| WEL | Interface | Native |
19 packages read and written, 18 of them built through the interface.
MODFLOW-USG
| Package | Build | Existing model |
|---|---|---|
| BAS | Interface | Native |
| BCF | — | Native |
| CHD | Interface | Native |
| CLN | Interface | Native |
| DIS | Grid tools | Native |
| DISU_MANUAL | — | Rejected |
| DRN | Interface | Native |
| EVT | Interface | Native |
| GHB | Interface | Native |
| GNC | — | Preserved |
| HFB | Interface | Native |
| LPF | Interface | Native |
| OC | Interface | Native |
| RCH | Interface | Native |
| RIV | Interface | Native |
| SFR | — | Native |
| SMS | Interface | Native |
| TIB | Interface | Native |
| WEL | Interface | Native |
18 packages read and written, 15 of them built through the interface.
Still to come
Packages GWlink does not read today. They are listed because a specification that hides its gaps is not a specification.
- MODFLOW 6
- BUY · CSUB · LAK · MVR · TVD · TVK · TVS · UZF
- MODFLOW-USG
- SUB · SWR
- MODFLOW-2005
- Not wired yet. The engine slot exists and the package shapes are mapped, but nothing is claimed until a model of yours opens, runs and writes back.
How this page is kept honest
Every row is generated from the same registry the product builds against, so the page cannot drift from the software the way a hand-written feature list does. The round trip is exercised against published models from the MODFLOW 6 example suite, FloPy and the GMDSI tutorials, each one opened, written back and run.
30 canonical models in the suite, 30 of them expected to converge.
If the package you need is on the second list, it is worth saying so when you write.
GWlink is in private beta, by invitation.