Random Walk Particle Tracking In Heterogenous Medium

we attempt to model particle movement in the unsaturated zone. In our model, the paticles move at the time of exactly one second towards the domain bottom boundary (independend of temporal discretisation). Can anybody please have a look at the model setup (attached) or give information about RWPT specific input files such as .pct and .mcp?

Thank a lot and best regards
Raoul Jankowski

Partikel Test.7z (1.96 MB)