MODFLOW Version 2011.1 - Readme
Visual MODFLOW 2011.1
Water Services is pleased to welcome you to the growing community of Visual
MODFLOW users, currently consisting of more than 6,000 scientists and
engineers from around the world. We are proud of the fact that Visual
MODFLOW is the most popular and widely-used groundwater modeling software
package in the world, and we are committed to maintaining a leading position in
groundwater software development.
document provides supplemental information to the Visual MODFLOW User's Manual
and contains late-breaking details on new features and known issues with the
program. You are encouraged to read this document prior to starting Visual
Table of Contents
MODFLOW is the most complete and easy-to-use modeling environment for practical
applications in three-dimensional groundwater flow and contaminant transport
simulations. This fully-integrated package combines MODFLOW, MODPATH,
ZoneBudget, MT3Dxx/RT3D, and WinPEST* with the most intuitive and powerful
graphical interface available. The logical menu structure and easy-to-use
graphical tools allow you to:
dimension the model domain and select units,
assign model properties and boundary conditions,
the model simulations (MODFLOW, MODPATH, ZoneBudget, MT3D/RT3D, and
WinPEST are seamless integrated),
the model using manual or automated techniques, and
the results using 2D or 3D graphics
input parameters and results can be visualized in 2D (cross-section and plan
view) or 3D* at any time during the development of the model or the displaying
of the results. For complete three-dimensional groundwater flow and contaminant
transport modeling, Visual MODFLOW is the only software package you will need.
purchase Visual MODFLOW, or any Schlumberger Water Services software product,
you not only get the best software in the industry, you also gain the
reputation of the company behind the product, and professional technical
support for the software from our team of qualified groundwater modeling
professionals. Schlumberger Water Services has been developing groundwater
software since 1989 and our software is recognized, accepted and used by
groundwater professionals in over 90 different countries around the world. This
type of recognition is invaluable in establishing the credibility of your
modeling software to clients and regulatory agencies.
3D-Explorer are only available with the Pro and Premium versions.
interface for Visual MODFLOW 2011.1 has much of the same user-friendly look and
feel as previous versions of Visual MODFLOW, but what’s “under the hood” has
been dramatically improved to give you more powerful tools for entering,
modifying, analyzing, and presenting your groundwater modeling data. Some of
the more significant upgrade features in the latest version of Visual MODFLOW
are described below.
following new features are available in Visual MODFLOW 2011.1:
new and improved version of MODFLOW provides enhanced capabilities for
solving problems involving drying and rewetting nonlinearities of the
unconfined groundwater-flow equation. For more information, refer to the
USGS Publication 6-A37, MODFLOW-NWT, A Newton Formulation for
64-Bit MODFLOW Engines
flow engines are now available as 64-bit versions, allowing you to
leverage maximum amount of RAM on your machine while running simulations.
include: MODFLOW-2000, MODFLOW-2005, MODFLOW-NWT, and SEAWAT
Parallel Processing - Flow and
Flow Solvers: PCG, WHS, SAMG* (Premium Version only)
Engines: RT3D, PHT3D, SEAWAT, MT3D99* (*Premium version only, or available
as an add-on)
SAMG Update (LMG2)
SAMG Solver has been updated to provide improved performance. SAMG also
supports parallel processing on computers with multi processor support.
Improved Evapotranspiration Runtime
to Recharge, Evapotranspiration can now be applied to different layers during
To the top layer
To a specified layer
To the top-most active layer
Extended Lake Capabilities
defining a lake boundary condition, there is now an option to define horizontal
leakance explicitly; this is important when there is both horizontal and
vertical flow between the lake and aquifer, which is common in quarries or mine
tailing ponds that have steep walls
Output, there is a new Lake Budget option for Graphs that allow for showing
time series plots of the lake parameters: stage, precipitation, evaporation,
runoff, volume changes. You can chart results from a single model or load
multiple model results on the same plot, for comparing different model
Fixed in v.126.96.36.199 (August 2011)
3D-Explorer button would not
load the 3D-Explorer on Windows 7 machines
Added new options for MT3D
Output control, for filtering the amount of data saved to the .OBS and .MAS
package, translation, was not reading the correct layers when enforcing
the layer type to be type 1 or 3
with calculation with HFB package and MF2000/2005 - incorrect calculation
of HYDCHR parameter
when running MODFLOW-SURFACT projects with LAK boundary condition
message when run SEAWAT bench mark project.
translate the model, in some cases the Engine Manager window
appear minimized to the task bar.
running MGO well optimization get error message.
discharge options changes are not used during run - was always using
exporting pumping wells, there is now an option to export in world
import of *.RCH file, the stress periods for different zones were not
being calculated correctly
of numerical grid now includes layer, row, column as attributes
some cases the button to Assign cells for Evapotranspiration was not
Fixed in v.188.8.131.52 (September 2010)
error message "ERROR: MAXIMUM NUMBER OF SINK/SOURCES ALLOWED
(MXSS)=246" no longer shows when you run a SEAWAT model that uses the
Multi-node Well Package (MNW)
specifying a constant head boundary condition using a linear gradient,
Visual MODFLOW now permits start time and end time head values provided
they are above cell bottom elevation of each assigned cell
databases (Conductivity, Storage, Initial Heads, Initial Concentration)
can now be exported to text (.TXT) file format
access violation error message no longer shows when you export velocity
vectors while in a column view
specifying initial heads using heads from a different model, and the heads
contain some dry cells, Visual MODFLOW no longer assigns incorrect head
values to the dry cells
importing property zones, the default layer option now corresponds to the
layer the user is currently viewing, instead of "All Layers"
user can now conveniently check for program updates by selecting Help >
Check for Updates from the Visual MODFLOW main menu. Please note that an
internet connection is required
well data, including well information, screened intervals and pumping
schedules can now be exported from the Input screen to .TXT and .CSV file
concentration graphs for PHT3D v.2.0 simulations are now plotted correctly
using mol/L instead of mg/L
boundary condition parameters (Riverbed thickness, river bottom and
riverbed Kz) can now be edited after the
boundary condition has been created
exporting output data (File > Export > Data), there is now an option
to export data for all layers
MODFLOW no longer exports an invalid time marker shapefile, when exporting
pathlines to a world shapefile
Fixed in v.184.108.40.206 Patch 3 (November 2009)
Readme.htm, VMCalibration.exe, VMImpProps.exe, VMOD.dll, VMOD.exe, VMOD.xml,
the installation of MODFLOW SURFACT on a 64 bit computer, an error message
was displayed indicating that the installation “failed to install the
virtual device driver”. When attempted to run a MODFLOW SURFACT model in
Visual MODFLOW, the run was unsuccessful.
DNSCRIT parameter in the SEAWAT simulation settings was restricted to a
value between 0 and 1. Values greater than 1 are now accepted.
viewing zone budget time series flow graphs, the STORAGE OUT label in the
legend was showing as IN-OUT .
with a lot of time steps running MT3D can corrupt the .mdb
file and cause the application to freeze. Input fields for parameters
NPROBS and NPRMASS have been added to the MT3DMS run settings to allow
saving concentrations at observation points for n-th
well data cannot be imported if, when selecting the source file, the
“Files of type” combo box is set to “All files” and then an .XLS file is
to previous versions, run-times increased for MODFLOW SURFACT 3.0
simulations. Overall run-times have been improved considerably.
importing a MODFLOW dataset with multiple boundary conditions assigned to
the same cell, Visual MODFLOW allows you to save this listing in text
file. However, the file was not saved with the associated .txt extension.
default value for the VISCREF parameter in the SEAWAT simulation settings
was 0.0008904 kg/m.day. This has been replaced
with the correct value of 86.4 kg.m/day.
importing MODFLOW models, Visual MODFLOW would use specified heads for
initial head values instead of heads generated from the previous model
run. By default, heads generated from a previous run are now used for
imported MODFLOW models.
importing MODFLOW datasets, if there were instances where multiple
boundary conditions are assigned to a single cell, a warning messages was
displayed for each instance. This sometimes resulted in many warning
messages during the import process. Visual MODFLOW will now only show one
warning message, listing each cell in the dataset that contains multiple
SEAWAT simulations, the DMUDC parameter unit was incorrect (L4/T). It has
been updated with the correct unit (L2/T)
importing a MODFLOW 2005 dataset, the default numeric engine was set to
MODFLOW 2000 instead of MODFLOW 2005 in the Edit Engines dialog.
Added in v.220.127.116.11 (March 2009)
MODFLOW now support up to 200 layers in a model grid.
Fixed in v.18.104.22.168 (March 2009)
defect that prevented the correct output results from showing for some
PHT3D simulations was fixed.
some cases, an EAccess Violation error message
would show when refining the grid spacing.
viewing Zone Budget output graphs, an error message would appear
indicating that .CMB file could not be found.
concentration zones for species were sometimes deleted after refining the
some cases, when importing a time schedule for a constant head boundary
condition, an error message would show and the application would shut
some cases, Visual MODFLOW would not start on Windows XP 64-bit operating
defect related to the precision of boundary and initial concentrations in
PHT3D simulations was resolved. In previous versions, very small input
values for constant concentration values, i.e., 1e-8 mol/L, were
incorrectly rounded to 0.
applying a pumping schedule to multiple wells in the Well Manager, the
defined pumping schedule was only saved for the first well.
MODFLOW is fully compatible with projects from Version 4.x. Visual MODFLOW
automatically detects whether a project was created in an earlier version of
Visual MODFLOW. If it detects such a project, Visual MODFLOW will automatically
update the files to the current format. However, since the converted files are
not compatible, Visual MODFLOW will ask if you want to create a backup copy of
the project before it converts the files.
NOTE: Although the direct
opening of Visual MODFLOW 3.X and older models is not explicitly supported, due
to the possibility of differences between the original project and the
converted project, in most cases there should be no issues experienced when
directly opening an old Visual MODFLOW project in Version 2011.1. However, SWS
recommends that you carefully check your Input and Run parameters after
converting to the current format, before continuing to work with the project.
If you encounter problems with converting old projects, please contact us for
Extended Modeling Support (EMS):
recommended that you ALWAYS create a backup copy of any project files you open in
the new version of Visual MODFLOW.
Schlumberger Water Services is not responsible for any direct or indirect
damages, however caused, if project data has not been securely and
independently backed up.
Known Issues with Visual MODFLOW
every reasonable effort has been made to fix any known problems with the
software, there are some issues with the software we were not able to fix
before the program was released. These remaining issues will not affect
the results of the simulation in any way, but they do affect your ability to
use the software. We are working towards the elimination of these
problems, and we will be posting patch installation programs on the SWS website
from time to time so you can update your program. However, in the
meantime, it is important for you to know about the issues that may affect the
performance of the software and your ability to use it effectively. These
issues are documented below:
Parallel processing for RT3D,
MT3D99, and PHT3D is not available; a patch will be deployed shortly after
When using MT3DMS with parallel
processing, the project files must be in a directory that does not contain
When running SAMG with MODFLOW
32-bit versions and large models, you may experience out of memory issues;
it is advised to use other solvers (GMG, PCG) or use on a 64-bit machine
SEAWAT, need to use the DRHODC parameter instead of DENSESLP when working
with just the salt species.
Violation error sometimes occurs when in the Properties/Database window.
Workaround: Save your project, close, then
re-start Visual MODFLOW.
may occur when running MODFLOW-2000, 2005 with GMG solver and large models
transport engines MT3DMS/MT3D99/ RT3Dv.2.5 do not run with the double
precision version of MODFLOW-2005 .DLL version
and ZoneBudget do not run with MODFLOW-2000 .EXE version, when using the
"Error reading flow- Transport link file" occurs when running
PHT3D v. 2 with MODFLOW-2005, Double precision, .DLL version
certain instances the 3D Explorer will give you a warning message about
being in demo mode and will not launch. We are aware of the issue and
looking into resolving it.
slight instabilities in the running of numerical
engines have been encountered.
Close Engine Manager and re-run model. If you are running multiple
engines you may need to run them individually.
running Visual MODFLOW on Windows 7 you may encounter errors when running
Turn off the UAC or run as Administrator.
using an older version of MODFLOW-SURFACT, e.g., v.2.0, with Visual
MODFLOW, calculated head results may be incorrect.
The latest version of Visual MODFLOW is designed to run with
MODFLOW-SURFACT v.3.0. In MODFLOW-SURFACT v.3.0 the LOGICAL UNIT has
changed from 6(16) to 28(38). If you are running MODFLOW-SURFACT v.2.0
you must manually modify the translated .BAS file before running your
model to reflect the old LOGICAL UNIT. To do so, after translation,
simply open the .BAS file using Notepad. On line four, locate the 28th
number in the line and change it to a 0. Next, locate the sixth number in
the line, and change it to 16. Save the change, close Notepad, and then
start VMEngines to run the model.
with Hydro GeoBuilder installed may experience a problem when creating
Surfaces from point data objects in Hydro GeoBuilder, after Visual MODFLOW
2011.1 has been uninstalled from their machine.
After uninstalling Visual MODFLOW 2011.1, also uninstall Hydro GeoBuilder.
Once both are uninstalled, reinstall Hydro GeoBuilder.
may encounter a problem when running SEAWAT 4 simulations with the
Multi-Node Well (MNW) package. During the model run, the simulation may
terminate before completion and show an error message, or the necessary
input file for the MNW package may not be generated during translation.
These issues are currently being investigated.
MODFLOW-SURFACT projects created in v.2, after loading these projects into
the latest version of Visual MODFLOW, you must do a Run and Translate with
the new version of SURFACT, in order to completely update the project to
the latest version of the engine.
integrating MODFLOW-SURFACT with Visual MODFLOW, if the connected dongle
does not contain a valid SURFACT licence or the
dongle is not plugged into your computer, a "HASP not found
(-3)" error message will appear. Please be sure that a dongle with an
appropriate SURFACT licence is connected to your
computer, before you attempt to launch Visual MODFLOW.
observation package for MODFLOW-SURFACT v.2.2 is not supported. Please
contact technical support for assistance.
the MIKE 11 example tutorial, the provided *.OMI file is not compatible
with newer versions of MIKE 11. If you are using MIKE 11 version 2007 or
2008, you must first run the provided MIKE 11 model to generate a
compatible *.OMI file, and then use this file to define the MIKE 11 river
network in Visual MODFLOW.
the following flow/transport engines do not support the Multi-Node Well
(MNW) package: RT3D (v.1.0, v.5.2), MT3D (v.1.5) and SEAWAT-2000.
running flow and transport, Visual MODFLOW will not write results unless
the appropriate time steps are selected in the output control.
projects using the MODFLOW 2000 flow engine with a PHT3D transport
variant, if the flow engine is changed to MODFLOW 2005 after the PHT3D
species have been defined, you will receive an "Abnormal
Termination" error and Visual MODFLOW will shut down.
running MODFLOW-SURFACT version, with a license that does not include PCG5
solver, you should not select this solver from the MODFLOW / Solver
settings. The run and translation will begin,
however, you will not see any results.
running MODFLOW-2000 flow engine with MIKE 11 2008 on a Windows Vista
64-bit or Windows XP 64-bit computer, an "Application Error"
message is shown and the simulation does not finish successfully.
performing a remote-update with a network dongle on a 64-bit machine, the
network licence will turn into a local license
This is a compatibility issue with 64-bit computers. For network licenses
only, be sure to run remote-updates using a 32-bit computer
are display issues when running Visual MODFLOW with more than one monitor;
currently this configuration is not supported.
- WinPEST - Models located in a
directory path that is longer than 100 characters may not run, or the
results from the simulation may not be written to the hard drive.
buttons and labels are not displayed properly when using DPI settings
higher than 96, or with large Fonts.
deleting a bitmap, then adding a new bitmap with
the same name. The new georeference points are not utilized. Change the
name of the bitmap before importing again in order for the georeference
point changes to take effect.
Between Layers calculations may be incorrect if
the Layer type is not confined (e.g. layer type=3), and if the cell top
elevation is different from the water table elevation.
running a MIKE 11 simulation, and MIKE 11 river network is the only
boundary condition, Visual MODFLOW will create default stress periods with
start time = 0 and stop time = steady-state simulation time
refining the model grid, the initial concentration values are deleted
using MIKE 11, and interchanging a model between computers that use
different date formats (as specified in the regional settings), the model
result will not update automatically when executing a Run only.
Do a Run and Translate on the Visual MODFLOW project to ensure the
.OMI and .OPR files are updated with the system's date format
highly irregular layer surfaces, problems may occur when displaying color
shading with transparency in cross-section view.
screen displays MODFLOW SURFACT as a supported add-on package with all
installations. MODFLOW SURFACT is only available if this package has been
purchased, and the appropriate dongle is attached. Otherwise,
MODFLOW SURFACT will be available in a feature-restricted demo mode.
- currently, an imported model always defaults to
Steady-State (in the Edit-Engines dialog) regardless of the original
Initial Heads, it is necessary to select the "[project].vmp.hds" file manually after importing the model
(from the RUN menu MODFLOW-Initial Heads) before running the model for
the first time. If this is not done, then the Specified heads are used
settings of original model are not remembered - Solver type and settings
are ignored and Visual MODFLOW defaults to the WHS solver. Please check
your solver and settings after the model has been imported, before you
run the model.
running a network installation, from the client machine, and saving a
model as a new name, VMEngines may not run and
translate during the first attempt. A workaround is to close VMEngines and Visual MODFLOW, then re-open and re-run
creating a new project, if you halt midway through the process, then
attempt to create another new project, an error will occur.
running MODFLOW 2000 and using the option "Anisotropy as
Specified" it is not possible to use the BCF package; only the LPF
package is supported.
For product pricing
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