Βελτιωμένο Μοντέλο Σχεδιασμού και Ανάλυσης
Groundwater Vistas Unique Capabilities
- Design models for MODFLOW, MODPATH, and MT3D
- Displays both plan and cross-sectional views
- Run all supported models from within GV
- Public domain versions of MODPATH and MT3D included
- Creates datasets for PEST model-independent calibration software
- Unlimited model size
- Imports existing MODFLOW and ModelCad models
- Imports data from SURFER and ASCII files
- Exports model results to SURFER, Spyglass, DXF, and ASCII files
- Overlay maps in DXF and SURFER BLN formats
- Full on-line context-sensitive help
- WYSIWYG printing with print preview
- All Windows Versions supported! (3.1, 3.11, 95, and NT)
Telescopic Mesh Refinement: Automatically create a refined submodel from a larger scale model with choice of exterior boundary conditions. Ideal for local-scale transport modeling!
Inverse (Autocalibration) Modeling:: GV now incorporates an inverse model using the Gauss-Newton nonlinear least-squares parameter estimation technique. This provides modelers with a powerful model calibration tool that is easy to use (requires MODFLOWwin32).
Groundwater Vistas (GV) is a unique groundwater modeling environment for Microsoft Windows that includes both pre and postprocessing and couples a powerful model design system with comprehensive graphical analysis tools. GV, developed by the author of ModelCad, is a model-independent graphical design system for MODFLOW and related models. In addition, GV supports the use of the PEST model-independent calibration software. The combination of PEST (a trial version is included with GV) and GV's automatic sensitivity analysis make GV a powerful calibration tool!
GV displays the model design in both plan and cross-sectional views using a split window (both views are visible at the same time). Model results are presented using contours, shaded (color flood) contours, velocity vectors, and detailed mass balance analyses. MODPATH particle traces are also displayed in both plan and cross-sectional views. Another unique aspect of GV is its use of grid independent boundary conditions. Grid-independent boundaries do not change position as the grid is modified. This allows the user to make major changes to the mesh without wasting time repairing the location of boundaries.
GV is designed to be a model-independent system. This means that you only need to learn one software program in order to use a wide range of groundwater models. In the current release, GV supports the following models:
MODFLOW, a three-dimensional groundwater flow model published originally by the USGS.
MODFLOW-SURFACT, a new version of MODFLOW that includes variably-saturated flow, a sophisticated well-bore model, a radial flow model, an improved recharge package including seepage faces, an improved PCG solver, and a contaminant transport model that incorporates the new TVD solution scheme. TVD allows you to simulate sharp contaminant fronts without the mass-balance problems associated with particle-tracking codes.
MT3D, a three-dimensional contaminant transport model (public domain version). GV even supports the latest version of MT3D, MT3D96.
MODPATH, a three-dimensional particle-tracking model developed by the USGS, that works with MODFLOW. The initial release of MODPATH supported only steady-state MODFLOW models. The most recent version, however, has been enhanced to include transient simulations. GV supports both versions.
MODFLOWT, a new version of MODFLOW that includes contaminant transport.
PATH3D, a three-dimensional particle-tracking model that works with MODFLOW.
PEST, a model-independent calibration tool which uses nonlinear least-squares techniques to calibrate virtually any type of model. Special software is included with GV to interface PEST with all models supported by GV.
All of the supported models may be run from within the GV environment. That means that you simply click a button to create data sets, run the model, and display the results. No other software offers you as seamless an interface to such a wide variety of models!
GV imports a wide variety of files to make model-building a quick and painless process!
Types of files that may be imported include the following:
MODFLOW data sets. GV can import virtually any existing MODFLOW data files that you may already be working on. This allows you to quickly get started with GV. The MODFLOW import capabilities are much more sophisticated than other available software which requires the data files to be truly three-dimensional (all layers must be type 1 or 3). GV can even import MODFLOW data sets that place parameter arrays in external files.
ModelCad386 files. GV was written by the same author as ModelCad and can thus read any ModelCad design file.
Digitized map files. GV imports AutoCAD DXF files, SURFER BLN (blanking) files, and ModelCad map files. These files are automatically converted to the GV map file format. No auxiliary software is required.
Calibration target data. Calibration targets are point measurements of head, concentration, drawdown, or water flux that are compared against model-computed values during model calibration. These data may be imported from ASCII files for both steady-state and transient targets.
Boundary condition data. GV imports boundary condition data from delimited ASCII files for any boundary type.
Aquifer property data. GV imports both SURFER grid files and delimited ASCII files (X,Y,Z format) to set any aquifer property (e.g., hydraulic conductivity, layer elevations, etc.).
GV offers a wide variety of analysis techniques for viewing the results of model simulations including the following:
A unique and powerful model calibration feature is the ability to conduct a detailed parameter sensitivity analysis. You select the parameter type (e.g., vertical hydraulic conductivity or boundary condition conductance, etc. the number of simulations, and the parameter value for each simulation. GV then runs the model automatically and extracts both calibration and head-change information.
- Head, Drawdown, Concentration, Flux contours
- Head, Drawdown, Concentration, Flux color floods
- Velocity Vectors
- Pathline and travel times from MODPATH/PATH3D
- Local Mass Balance Bar Charts
- Plot head, drawdown, concentration versus time
- Parameter Sensitivity Plots
- Head, Drawdown, Concentration, Flux Profiles along a cross-section
- Calibration target scatter plots
- Calibration target hydrographs
- Calibration statistics for head, concentration, flux
GV produces report-quality graphics using any Windows device driver. Output may also be exported to a wide variety of file types including SURFER, Geosoft, Spyglass, Windows Metafiles, and AutoCAD-compatible DXF files.
486+ running Microsoft Windows and 8 MB RAM.
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Τελευταία Ενημέρωση 27 Ιουλίου 2004 - Last Revised on July 27th, 2004
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