MODPATH 6 is a particle-tracking post-processing model that computes three-dimensional flow paths using output from groundwater flow simulations based on MODFLOW, the U.S. Geological Survey (USGS) finite-difference groundwater flow model. The program uses a semianalytical particle-tracking scheme that allows an analytical expression of a particle's flow path to be obtained within each finite-difference grid cell. A particle's path is computed by tracking the particle from one cell to the next until it reaches a boundary, an internal sink/source, or satisfies another termination criterion. Data input to MODPATH consists of a combination of MODFLOW input data files, MODFLOW head and flow output files, and other input files specific to MODPATH. Output from MODPATH consists of several output files, including a number of particle coordinate output files intended to serve as input data for other programs that process, analyze, and display the results in various ways.
Pollock, D.W., 2012, User guide for MODPATH Version 6--A particle-tracking model for MODFLOW: U.S. Geological Survey Techniques and Methods, book 6, chap. A41, 58 p., https://doi.org/10.3133/tm6A41
Source code was retrieved from https://water.usgs.gov/water-resources/software/MODPATH/modpath.6_0_01.zip.
This repository is provided as a courtesy and is not actively maintained. Modifications to the original source may have been made. Use this resource at your own risk; it should be regarded as provisional and not as an authoritative substitute for the official software release by the original authors.