PATH3D V4.6 is a powerful and widely used particle-tracking program for MODFLOW.

A Groundwater and Travel-Time Simulator

PATH3D can be applied to help visualize three-dimensional flow fields, to delineate contaminant capture zones or wellhead protection zones, and to evaluate the effectiveness of groundwater remedial scenarios under complex hydrogeological conditions. PATH3D is a valuable extension to a groundwater flow model, and is frequently a practical alternative to a contaminant transport model.

Please Note: Path3D has been deprecated and is no longer actively maintained by SSP&A.  Users running Path3D on newer versions of Windows may experience user interface related problems. Current and future development of this software functionality has migrated to mod-PATH3DU which incorporates the capabilities of MODPATH, Path3D, and additional capabilities beyond those of these programs.

Key Features

  • Full compatibility with MODFLOW88 and MODFLOW96
    PATH3D is designed to function directly with earlier versions of MODFLOW, the industry-standard groundwater flow code.
    ( PATH3D does not currently support MODFLOW2000 )
  • Accurate and efficient tracking procedure
    Automatic tracking stepsize control procedure that achieves user-specified error criteria with minimum computational effort.
  • Improved handling of weak sinks and distorted grids
    Algorithms for the effective handling of weak sinks/sources and distorted model grids.
  • Postprocessing programs
    Includes a complete set of post-processing programs for plotting pathlines, front positions and capture zones using Golden Software's Surfer.
  • Dynamic memory allocation
    PC version is compiled with dynamic memory allocation to efficiently reserve only the necessary computer memory.
  • Distributed with source code
    Comes with source codes written in standard Fortran 90.

These programs are provided FREE of charge. The authors request only that application of the software and production of results using the code is accompanied by a suitable acknowledgment. The software is provided "AS IS", without warranty of any kind, including, without limitation, the warranties of merchantability, fitness for a particular purpose and non-infringement. The entire risk and responsibility as to the quality and performance of the Software is borne by the user. The author(s) disclaim all other warranties.