The MIKE SHE Particle Tracking (PT) module is an alternative description of solute transport. PT calculates the location of a number of particles at every time step. The particles are displaced individually in the three-dimensional, saturated groundwater zone (SZ). The movement of each particle is composed of a deterministic part, where the particle is moved according to the local groundwater velocity calculated by the MIKE SHE, and a stochastic part, where the particle is moved randomly based on the local dispersion coefficients.
The PT module is a part of the MIKE SHE Advection Dispersion module and many of the same equations are used. For example, basically the same governing equation and the exchange of data with the MIKE SHE water movement simulation is similar in both modules. Therefore, you may find MIKE SHE AD Technical Reference a good source of additional information.
The PT module is typically used to delineate capture zones, upstream zones, and to determine groundwater age