Educational Version of GFLOW is free.
Professional Version of GFLOW is $475.

Click on Order GFLOW for complete price information.
Latest Release
GFLOW version 2.1.2 is the latest release. Click on GFLOW 2.1.2 Install to download this newest version. Refer to the readme.txt for installation instructions.
PLEASE NOTE: GFLOW uses a Windows help system which cannot be distributed through the install package for the latest operating systems. To download and install this click on the relevant operating system link: Windows Vista, or Windows 7, or Windows 8. Alternatively you may download the help system in pdf format (zip file with pdf files) by clicking here.
What is GFLOW?
GFLOW is a highly efficient stepwise groundwater flow modeling system developed by Haitjema Software, a subdivision of Haitjema Consulting, Inc. GFLOW is a Windows program based on the analytic element method. It models steady state flow in a single heterogeneous aquifer using the Dupuit-Forchheimer assumption. While GFLOW supports some local transient and three-dimensional flow modeling, it is particularly suitable for modeling regional horizontal flow. To facilitate detailed local flow modeling, GFLOW supports a MODFLOW-extract option to automatically generate MODFLOW files in a user defined area with aquifer properties and boundary conditions provided by the GFLOW analytic element model. GFLOW features conjunctive surface water and groundwater modeling using stream networks with calculated streamflow. The conjunctive solutions may include detailed lake waterbalance modeling. GFLOW also supports freshwater and salt water interface flow. GFLOW provides intergrated parameter optimization by use of PEST or UCODE (these programs are included).
What is new in GFLOW?
  • import of many different vector and raster graphics files for a base map
  • inhomogeneities with common boundaries
  • contouring of stream function and drawdowns
  • implement scenario feature for calibration and sensitivity analysis
  • integrated support for parameter optimization using PEST or UCODE
  • see "What is new in GFLOW" for additional information
How to Acquire GFLOW
Try out GFLOW for free by downloading the GFLOW install executable. You will be running the "Educational Version" of GFLOW with some features disabled. If you want to purchase the "Professional Version" of GFLOW click on Order GFLOW and provide the requested information and your preferred method of payment. Upon payment, you will be emailed a "user name" and "unlock key" to change the "Educational Version" on your computer into the "Professional Version". You may also order a GFLOW distribution CD.
Click on the image for more screenshots of GFLOW
GFLOW supports conjunctive groundwater - surface water solutions. In the image, the pumping rates of several wells near a small stream have been doubled. As a result parts of the stream stopped flowing. See screenshot gallery for additional images of GFLOW models and model operation.

Obtain GFLOW




    Click here to obtain "Analytic Element Modeling of Groundwater Flow"

    Owners of "Analytic Element Modeling of Groundwater Flow" click here for software and errata.

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