Introduction to FEFLOW    

Over the last two decades the environmental industry has seen a dramatic increase in the application, understanding and acceptance of numerical modeling techniques for simulating groundwater flow and contaminant transport. During this time, the USGS's MODFLOW and MODPATH, and the popular contaminant transport program MT3D, have become worldwide standards for 3-D groundwater flow and contaminant transport modeling. Unfortunately, when you are faced with more challenging problems involving complicated geology, unsaturated flow, density-dependent flow (salt water intrusion), or thermal convection, these traditional modeling programs have proven to be unsuitable.

FEFLOW is the first complete groundwater modeling software package to successfully combine powerful graphical features with sophisticated analysis tools and robust numerical algorithms for;

Transient or steady-state flow
Saturated and unsaturated flow
Density-dependent flow (salt water intrusion)
Multiple free surfaces (perched water table)
Mass and heat transport
FEFLOW has been specifically designed to meet the advanced technology requirements of expert modeling professionals involved in complex groundwater modeling projects. The primary components of FEFLOW include:

A comprehensive selection of graphical tools for building the finite element mesh, assigning property zones and setting boundary conditions
Data import and interpolation routines including an ARC/INFO (ESRI) GIS data interface
Robust numerical algorithms and solution techniques
Real-time data interpretation
State-of-the-art 3-D visualization
These components ensure an efficient process for building the finite element model, running the simulation, and visualizing the results. FEFLOW is a fully-integrated modeling environment with a full-featured graphical interface and powerful numeric engines that allow the user to:

Graphically create finite element meshes for simple or complex geological formations
Import and link data from external sources via FEFLOW's GIS/DATA Coupling exchange system
Assign all necessary flow and transport parameters
Run complex model simulations, and
Visualize the simulation results in two- or three-dimensions
Try FEFLOW today and see why it is the expert's choice for advanced groundwater modeling applications.

Main Features
Advanced 3-D graphically-based modeling environment
Saturated & unsaturated flow and contaminant transport (2D & 3D)
Convective, conductive, and thermo-dispersive heat transport
Fully-transient, semi-transient & steady-state flow and transport processes
Confined & unconfined aquifers, multiple free surfaces for perched watertables
Cellular convection processes used for gravity driven, thermally driven, and double diffusive convection ideally used for saltwater intrusion
Powerful finite element mesh generation capabilities
Database and GIS-Coupling for efficient handling of environmental data
Integrated data regionalization routines for interpolating discrete data points
Graphically assign boundary fluxes and transfer conditions
Visualize simulation results using high impact, 3D visualization capabilities including fence diagrams, pathlines, isosurfaces, arbitrary cut-aways, isochrones, model rotation, and flow vectors
Create detailed budget reports for fluid flow, species concentrations and heat flow
New Interface Manager for linking FEFLOW to third party software or custom generated subroutines