MODPATH is a particle tracking post-processing package that computes and displays three-dimensional pathlines based on output from MODFLOW. These pathlines help us to see the expected transport trajectories coming from a specific contaminant source. In addition, we can also use this package to obtain the time that these pathlines will take to reach a particular point.
In this tutorial, we will show how to set up MODPATH to see the movement of particles over time coming from a contaminant source and how these can be influenced by factors like the presence of low permeability areas.
You can download the input files from this link.