Software CADSHELL

-

Exploration and development of groundwater resources

-

Delineation of capture zones

-

Design and planning of wide area drainages (e. g. open-pit mines)

-

Analysis of problems connected with groundwater drawdown processes

-

Investigations to ensure environment-friendly operation of waterworks

-

Investigating the improper disposal of harmful waste

-

Risk assessment analysis

-

Designing remedial strategies (e. g. arrangement of extraction wells)

MODFLOW

-

Modeling and analysis of groundwater flow for 2D- and 3D-problems

-

Calculation of water heads and volume budgets

-

Steady state and transient problems

-

Various types of time-variant boundary condition

-

Finite difference method

-

Equation solvers SIP, SSOR and PCG2

MODPATH

-

Semi-analytical particle tracking scheme

-

3D-calculations of groundwater flow velocities and directions

-

Creates pathlines and timeseries

-

Analysis of recharge and discharge areas

MT3D

-

Modeling of contaminant transport, taking into account dispersivity and physical/chemical reactions

-

Calculates the distribution of concentrations

-

Variety of methods to assign concentrations to boundary conditions

-

Simulation of sorption and decay processes

-

Sorption isotherms: Linear, Langmuir and Freundlich

-

Method of Characteristics (MOC, MMOC and HMOC) and Finite Difference Method with Front Limitation Algorithm

Setting up the model:

-

Easy grid generation using a geometry editor.

-

Changes in the geometry of the grid may be easily achieved at any time after creating the model. Add or delete rows and columns or move grid-lines to optimize grid spacing. Data matrices are generated accordingly, parameter values are automatically copied to newly created cells.

-

Edit all parameters using three different modes: block-edit, polygonal-edit or cell-edit.)

-

Control all graphical information of the model as well as the layers of the background-maps.

-

Switch between plan views and cross-sectional views for 3D-problems.

-

Various interpolation tools allow you to interpolate whole matrices, selected areas, or even single cells (useful for example for rivers or other linear boundary conditions). Four algorithms are currently available.

-

Copy data-matrices to other parameters (for instance bottom of layer 1 to top of layer 2 to guarantee consistent model geometry)

-

Every parameter matrix may be shown as colored solids. A dialog box allows you to change the range of values and the number of colors used.

-

Specify observation points not only for MT3D but also for MODFLOW and watch break-through-curves of concentration or graphs of head vs. time for transient problems in seperate diagram-windows.

-

Calculate differences between various data-matrices and show the results as a difference map (colored solids or isolines)

-

Support of all standard MODFLOW-modules. Additional and full support of the Lake-Package (AVC), Horizontal-Flow-Barrier (HFB module) and Streamflow-Routing Package (SRP) and a new algorithm for contaminant transport simulation (with MT3D): Front Limitation.

Running the simulation:

-

All MODFLOW, MODPATH and MT3D files are automatically generated and managed.

-

Different versions of package files (let one file contain no wells and a second a set of remediation wells) may be loaded in data structure dialog boxes for each simulation program.

-

Consistency checks of the modeling data are performed prior to calculations.

-

MODFLOW, MODPATH and MT3D are run within CADSHELL. Results are immediately displayed and automatically updated.

-

The interactive part of MODPATH ist replaced by editing the relevant data in a special control dialog before running MODPATH. This allows precise and easy graphical placing of particles for MODPATH-calculations.

During modeling work:

-

Calculated water levels or concentrations may be shown as contour lines.

-

MODPATH results can be shown as pathlines (with optional time markers), timeseries and recharge or discharge areas (colored symbols).

-

Inspector-function allows you to view all parameters for an individual cell. Just click on an point of interest and a box opens which shows all relevant values.

-

Time-variant boundary conditions and observation points may be displayed as icons.

-

Unlimited zoom or pan of your model.

-

The trial-and-error process of model calibration is supported by numerical and graphical tools as scatter-plot-diagram

-

Full numerical and graphical support for the calculation of volumetric budgets

-

Legends for parameter distributions are automatically created.

-

Automatic grid-labeling with the x- and y- index.

-

All graphical information are stored on different layers which can be switched on or off and may be freely combined for meanful documentation.

-

Print any part of the model in every scale using the powerful AutoCAD print and plot capabilities.

-

Interface to DXF, IGES, Postscript, TIFF, GIF and other graphical standards.

-

Isolines are automatically generated from the calculated heads or concentrations. There are many possibilities to influence their appearance, for instance width and color. You can specify different intervals for the spacing of isolines. All lines may be labeled automatically at the positions you prefer

-

Display of head versus time and concentration versus time in separate boxes.

-

Displaying high-quality maps in DWG format or combined with pixel-images (TIFF, BMP, etc.).

-

Results may be plotted together with a complete digitized or image map directly from the AutoCAD-DWG format.

-

All graphicaly displayed results can be exported separately to DXF-files for use with other programs like ARC/INFO, ARCView, etc.

-

Use of several external reference maps is possible.

-

Isolines can be displayed for any kind of model data.