When you open or create a file, you will be able to seamlessly switch between these modules to build or modify the model input parameters, run the simulations, and display results.

The Display Control Buttons

The ability to quickly and easily switch between plan view and cross-section display of the model is a powerful feature that allows the user to gain a better perspective on the three-dimensional aspects of the model input parameters and simulation results.

The Navigator Cube

The Navigator Cube provides a three dimensional schematic representation of the model grid and layers. This navigator cube provides a quick visual reference of your active position within the model domain.  Also, the active mouse location (X,Y,Z model co-ordinates and I, J, K grid coordinates) are interactively displayed below the navigator cube as you move the mouse around the screen.

Cell Inspector

The Cell Inspector is used to inspect selected model parameter values on a cell-by-cell basis.  Model parameters that may be viewed in the Cell Inspector include: 

• Grid Position
• Model Position
• World Position
• Properties (Kx, Ky, Kz, Specific Yield, Specific Storage, Effective Porosity, Initial Head, and Initial Concentration values)
• Boundary Conditions
• Output

Shortcut Buttons

Improved project creation wizard helps you to choose the optimal numeric engines to meet your project objectives.  You can also import MODFLOW-2000, MODFLOW-96, and MODFLOW-88 data sets.

Site Map Layers

Load site maps and overlay on your model. Supported formats included AutoCAD (.DXF), Shapefiles (.SHP), and Raster images (.BMP, .JPG, .GIF).

Grid Design

Visual MODFLOW Premium allows you to rotate the model domain over the site map (.DXF or .BMP format) to align the model grid with the site characteristics and groundwater flow direction. The finite difference grid can be modified by adding, deleting, moving and automatically refining rows, columns and layers.

Automatic Grid Smoothing

It is important to design the model grid with proper grid spacing to give you the level of detail needed, while maintaining the numerical stability you need for the solution to converge. Automatic grid smoothing is used to identify and fix regions
of the grid which are poorly designed

Importing Layer Elevations

Since most aquifers are not 'flat' layers, Visual MODFLOW Premium allows you to import layer surface data from ASCII (X,Y,Z), Surfer (GRD), USGS DEM (.DEM), ESRI (.GRD), MapInfo (.GRD).  Import and interpolate layer elevation data from XYZ ASCII files (TXT), MS Access Database (MDB), MS Excel (XLS), and ESRI Point Shape files (SHP).

There is an option to specify control points, manipulating the interpolation results.

Grid Cell Elevation Editor

This tool allows you to modify the individual elevations of each cell using an array editor to modify the elevation value. The cell elevations can also be modified in cross-section using 'drag-and-drop' methods to stretch or compress a cell thickness.

Pumping Wells

Pumping wells or injection wells can be added, deleted, copied or moved using the intuitive well edit tools that allow you to graphically delineate the well screen interval and enter or import real-time pumping schedules from an ASCII text file.
For sites with many pumping wells, Visual MODFLOW Premium can also import all relevant pumping well data.

Import wells from .txt, .vc, .shp, .xls and .mdb files.

Multiple well screens for a single well are easily accommodated while the pumping rate distribution between layers is automatically calculated based on the transmissivity of the layers through which it is screened.

Observation Wells

Visual MODFLOW Premium is the only MODFLOW modeling environment that allows you to assign multi-level observation wells, just like ones you have in the field. In addition, Visual MODFLOW is the only modeling software package that allows you to group the observation points into one or more observation groups. This grouping feature is used for interpreting the calibration data for an isolated section(s) of your model domain.

Properties

A modelltulajdonságokat két különböző csoportra lehet osztani:

          Flow Properties

Those physical model properties affecting the groundwater flow simulation. Flow properties include; hydraulic conductivity (Kx, Ky, and Kz), specific storage (Ss), specific yield (Sy), porosity and initial heads.

          Transport Properties

Those physical and chemical model properties affecting the fate, migration and degradation of a contaminant plume in groundwater, or adsorbed to the soil. Transport properties include; dispersion (Dx, Dy and Dz), bulk density, distribution coefficient (Kd), decay constants, initial concentrations.

Import property xones from ESR1 polygon (.SHP) files.

Properties can be interpolated from XYZ ASCII files (TXT), MS Access Database (MDB), MS Excel (XLS), and ESRI Point Shape files (SHP).  Interpolation options include Natural Neighbor, Kriging, and Inverse Distance.

Boundary Conditions

MODFLOW boundary conditions supported by Visual MODFLOW Premium include both steady-state and transient Constant Heads, Rivers, General Heads, Drains, Recharge and Evapotranspiration. The Horizontal Flow Barrier package is also supported.

Visual MODFLOW Premium also supports all contaminant transport boundary conditions available for the latest versions of MT3D including MT3DMS for multi-species transport, and RT3D for reactive transport and natural attenuation simulation. These include constant, recharge, or evapotranspiration concentration, and point source.

For transient simulations, real-time schedules of boundary condition values can be entered directly or imported into the time schedule from an ASCII text file. Recharge and evapotranspiration boundary conditions can be imported from ESRI polygon shapefiles.

Particles

Forward or backward tracking particles can be easily assigned for determining advective transport, preferred flow pathways and delineating well capture zones. Visual MODFLOW Premium’s intuitive graphical tools allow you to easily assign single particles, lines of particles and a circle of particles anywhere in your model domain.

Zone Budget

The Zone Budget package allows you to produce zone-to-zone flow summaries for regions of interest in your model domain. Define zone budget flow observations, such as baseflow to a stream, or flux across a boundary, which can be used for calibrating the groundwater flow model against data other than just head measurements. Zone budget observations can be included in WinPEST.

Enviro-Base Pro

Visual MODFLOW Premium now integrates Enviro-Base Pro - an all-in-one database designed to house a variety of referenced property information used when developing groundwater models.  Enviro-Base Pro enables you to consolidate your technical references into one package that can be easily launched, searched and updated.

More Details About Enviro-Base Pro

Using Visual MODFLOW, you can easily set up a batch file to run several models in succession.  This powerful feature allows you to create multiple versions on the same model and run them while you are doing other tasks including:

• Initial head estimates (import from ASCII or Surfer, or previous run).
• Option to calculate VCONT from ground elevation or initial heads
• Number of time-steps and time-step multiplier
• Solver selection and convergence settings
• Recharge layer settings
• Layer-types (e.g. confined, unconfined)
• Rewetting options, including option to maintain a minimum saturated thickness for dry cells and to specify a head value in these cells equivalent to the cell bottom elevation.
• Anisotropy option

MT3D Run Settings

• Initial concentrations (import from ASCII or Surfer)
• Solver and advection package settings (UFD, TVD, MOC, MMOC, HMOC)
• Simulation output times.

Advanced Settings

For the advanced users of MODFLOW, you can substitute your own manually created input data files for any MODFLOW by using the Advanced Settings. The Advanced Settings allows you to specify which files you will use from Visual MODFLOW Premium, and which files you will substitute.

Batch Runs

Visual MODFLOW Premium also now allows you to easily set up a batch file to run several models in succession. This is a very powerful feature that allows you to create several versions of the same model and then run the models while you are doing other tasks.

The Win³² MODFLOW Suite

Visual MODFLOW Premium includes the Win32 MODFLOW Suite with MODFLOW-2000, MODPATH, Zone Budget, MT3DMS and RT3D compiled to run as true Windows, 32-Bit applications. This unique and powerful modeling utility actually provides you with the ability to control the numerical solution process by manipulating the solver parameters and convergence criteria while the solution is in progress. In addition, it provides a real-time graphical display of the solution convergence data and a detailed graphical summary of the Zone Budget results.