Fig. 3
From: Tracing the horizontal transport of microplastics on rough surfaces
Examples of (a) trajectories of particles and (b) corresponding path lengths. These are results from one of the runs on the coarse surface with inclination 2.5∘ and an irrigation rate of 10.44 L h −1 and from a run with the same parameters but on the fine surface. Particle ID corresponds to an automatic numbering of PMMA articles sorted by the y coordinate