GMS:MODFLOW-NWT: Difference between revisions
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!align="center" width="50"|Name | !align="center" width="50"|Name | ||
!width="350"|Description | !width="350"|Description | ||
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|LMT||Link Modular Transport (MT3DMS) | |||
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|MNW||Multi-Node Well | |MNW||Multi-Node Well | ||
Revision as of 00:26, 3 January 2017
| MODFLOW | |
|---|---|
| Pre-processing | |
| MODFLOW Commands | |
| Building a MODFLOW Model | |
| Map to MODFLOW | |
| Calibration | |
| Packages Supported in GMS | |
| Saving a MODFLOW Simulation | |
| Importing MODFLOW Files | |
| Unsupported MODFLOW Features | |
| Run MODFLOW | |
| Post-processing | |
| MODFLOW Display Options | |
| MODFLOW Post-Processing Viewing Options | |
| Reading a MODFLOW Simulation | |
| Tutorials | |
| Packages | |
| Flow: | BCF6, HUF, LPF, UPW |
| Solvers: | SMS |
| Other: | UZF1 |
Starting at GMS version 8.2, GMS supports MODFLOW-NWT. MODFLOW-NWT is a version of MODFLOW based on MODFLOW-2005 that provides a different formulation of the groundwater flow equation designed to solve models that are non-linear due to unconfined cells or non-linear boundary conditions.
Choosing MODFLOW Version
Choosing to use MODFLOW 2000, MODFLOW 2005, or MODFLOW-NWT is done in the MODFLOW Global Options Dialog. At any time you can switch from one to the other.
Changes to MODFLOW 2005
Source code differences between MODFLOW 2005 and MODFLOW-NWT.
- UPW Package
- The Upstream Weighting package (UPW) is the flow package used with MODFLOW-NWT. The UPW package is only used with the NWT Solver Package.
- NWT Solver
- MODFLOW-NWT contains the NWT solver package. The NWT solver must be used when using the UPW flow package.
- WEL Package
- The WEL package was modified to add an option to decrease the pumping rate as the head drops below a user-specified percentage of cell thickness. The new option is called PHIRAMP.
- SFR Package
- The SFR package is modified to avoid removing water from dry cells and to calculate derivatives for the Newton formulation.
- UZF Package
- The UZF package is modified to avoid removing water from dry cells and to calculate derivatives for the Newton formulation.
- Other Packages
- Poor input values for other packages can result in convergence failure. For example, an EVT extinction depth below the cell bottom elevation can result water being improperly removed from a dry cell.
MODFLOW-NWT Files
Here are tables of some of the available Input and Output files for MODFLOW-NWT.
- For more information on these files see the manual
| Name | Description |
|---|---|
| MFN | MODFLOW Name File |
| GLO | Global Listing File |
| DIS | Discretization File |
| OC | Process Output Control Option File |
| BA6 | Basic Package Global Options File |
| Name | Description |
|---|---|
| DE4 | Direct |
| GMG | Geometric Multi-Grid |
| LMG | Link Algebraic Multi-Grid |
| NWT | Newton |
| PCG | Preconditioned Conjugate-Gradient |
| SIP | Strongly Implicit Procedure |
| Name | Description |
|---|---|
| BCF | Evapotranspiration Segments |
| HUF | Evapotranspiration |
| LPF | Layer Property Flow |
| UPW | Unsaturated-Zone Flow |
| Name | Description |
|---|---|
| ASP | PEST Advanced Spacial Parameterization |
| CHD | Time-Variant Specified-Head |
| DRN | Drain |
| DRT | Drain Return |
| EVT | Evapotranspiration |
| ETS | Evapotranspiration Segments |
| GAG | Gage |
| GHB | General Head Boundary |
| HFB | Horizontal Flow Barrier |
| LAK | Lake |
| RCH | Recharge |
| RIV | River |
| SFR | Streamflow-Routing |
| STR | Stream-Routing |
| SUB | Subsidence |
| SWI | Seawater Intrusion |
| UZF | Unsaturated-Zone Flow |
| WEL | Process Well |
| Name | Description |
|---|---|
| OBS | Main Observation Process Input |
| DROB | Drain Observation |
| CHOB | Constant-Head Flow Observation Input |
| Name | Description |
|---|---|
| MFS | MODFLOW Super File |
| MFW | GMS MODFLOW World File |
| MFR | GMS MODFLOW Result Index File |
| PRJ | Projection |
| CSV | Cell Summary Comma Separated Value Excel |
| HFF | Head and Flow File Link to MT3DMS |
| H5 | Hierarchal Data Format (HDF5) Array & List Data |
| M2P | MODFLOW Pest |
| PARAM | Parameter Information |
| Name | Description |
|---|---|
| CCF | Cell-to-Cell Aquifer Flow |
| CCF2 | Cell-to-Cell Stream Reach Outflow |
| DRW | Drawdown |
| GLO | Global Listing |
| HED | Head Output |
| OUT | Output |
| Name | Description |
|---|---|
| LMT | Link Modular Transport (MT3DMS) |
| MNW | Multi-Node Well |
| MNW2 | Multi-Node Well Version 2 |
| MNWI | Multi-Node Well Information |
| SWIBUD | Seawater Intrusion Package Budget |
| SWIZETA | Sewater Intrusion Package Zeta Surface |
| Name | Description |
|---|---|
| _W | Weighted Residuals |
| _WW | Weighted Equivalents & Weighted Observation |
| _WS | Weighted Residuals and Simulated Equivalents |
| _R | Unweighted Residuals |
| _OS | Observed Values and Simulated Equivalents |
| _B | Data Exchange File |
| _NM | Weighted Residuals and Probability Plotting |
External Links
| GMS – Groundwater Modeling System | ||
|---|---|---|
| Modules: | 2D Grid • 2D Mesh • 2D Scatter Point • 3D Grid • 3D Mesh • 3D Scatter Point • Boreholes • GIS • Map • Solid • TINs • UGrids |  |
| Models: | FEFLOW • FEMWATER • HydroGeoSphere • MODAEM • MODFLOW • MODPATH • mod-PATH3DU • MT3DMS • MT3D-USGS • PEST • PHT3D • RT3D • SEAM3D • SEAWAT • SEEP2D • T-PROGS • ZONEBUDGET | |
| Aquaveo | ||
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