Particle tracking can also be useful for identifying potential sources of known groundwater contamination. The idea is to add particles at the location of interest, track the particles backward in accordance with the flow field, and compare the pathline envelope to possible surface or subsurface sources of contamination.
The process for computing and visualizing particle pathlines is the same as described above: add particles using the ParticleTK button options, and click SIMULATE. But now select Cancel to the prompt regarding forward versus backward particle tracking so that MAGNET applies backward tracking.