MODPATH: A Particle-Tracking Model for MODFLOW

Release Date:

Overview of MODPATH

MODPATH three-dimensional perspective view of pathlines and time points for example simulation.

MODPATH three-dimensional perspective view of pathlines and time points for example simulation.

MODPATH version 7 is the fourth major release since its original publication. Previous versions were documented in USGS Open-File Reports 89-381 and 94-464 and in USGS Techniques and Methods 6-A41. The current release of MODPATH version 7 (7.2.001) works with MODFLOW-2005MODFLOW-USG, and MODFLOW-6. Support for unstructured grids in MODFLOW-USG and MODFLOW-6 is limited to smoothed, rectangular-based quadtree and quadpatch grids. In addition to unstructured grid support, input and output formats for MODPATH also have been modified to minimize the difference between MODPATH simulations based on the different versions of MODFLOW.

Note:  MODPATH version 7 only works with quadtree and quadpatch grids if they have a north-south orientation

 

Download Current Version of MODPATH

MODPATH version 7.2.001 was released December 15, 2017.

 

Documentation for MODPATH

Pollock, D.W., 2016, User guide for MODPATH Version 7 -- A particle-tracking model for MODFLOW: U.S. Geological Survey Open-File Report 2016-1086, 35 p., http://dx.doi.org/10.3133/ofr20161086.

 

Programs Related to MODPATH

  • MODPATH-LGR: MODPATH-LGR and MODPATH Version 7 are separate programs with their own distinct input and output structure. MODPATH-LGR is a variation of MODPATH Version 5 that has been modified to work with nested grid output produced by MODFLOW-LGR.

 

Superseded MODPATH Versions

 

Find MODFLOW-Related Software

Visit the MODFLOW and Related Programs page for a list of MODFLOW-related software.

 

How to Cite MODPATH

This USGS software has two citations associated with it.

  1. The report citation is for the original report or article documenting the underlying theory, methods, instructions, and (or) applications at the time the initial version of the software was released. This digital object identifier (DOI) is for the report.
  2. The software release citation is for the software/code itself (now referred to by USGS as a "Software Release") and references a specific version of the code and associated release date. This DOI links to the code.

In instances where an author is citing use of this software, it would be appropriate to cite both the report documenting the code and the specific software release version that was used.

Report Citation for MODPATH

Pollock, D.W., 2016, User guide for MODPATH Version 7 -- A particle-tracking model for MODFLOW: U.S. Geological Survey Open-File Report 2016-1086, 35 p., http://dx.doi.org/10.3133/ofr20161086.

Software/Code Citation for MODPATH v7.1.000

Pollock, D.W., 2017, MODPATH v7.2.01: A particle-tracking model for MODFLOW: U.S. Geological Survey Software Release, 15 December 2017, http://dx.doi.org/10.5066/F70P0X5X.

 

Software License and Purchase Information

This software is a product of the U.S. Geological Survey, which is part of the U.S. Government.

Cost

This software is freely distributed. There is no fee to download and (or) use this software.

License

Users do not need a license or permission from the USGS to use this software. Users can download and install as many copies of the software as they need.

Public Domain

As a work of the United States Government, this USGS product is in the public domain within the United States. You can copy, modify, distribute, and perform the work, even for commercial purposes, all without asking permission. Additionally, USGS waives copyright and related rights in the work worldwide through CC0 1.0 Universal Public Domain Dedication (https://creativecommons.org/publicdomain/zero/1.0/ ).

 

SOFTWARE USER RIGHTS NOTICE

This software has been approved for release by the U.S. Geological Survey (USGS). Although the software has been subjected to rigorous review, the USGS reserves the right to update the software as needed pursuant to further analysis and review. No warranty, expressed or implied, is made by the USGS or the U.S. Government as to the functionality of the software and related material nor shall the fact of release constitute any such warranty. Furthermore, the software is released on condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use. Also refer to the USGS Water Resources Software User Rights Notice for complete use, copyright, and distribution information.

Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.