Indian Statistical Institute 1 article published in JoVE Environment Image-based Lagrangian Particle Tracking in Bed-load Experiments Alessio Radice1, Sankar Sarkar2, Francesco Ballio1 1Dept. of Civil and Environmental Engineering, Politecnico di Milano, 2Physics and Applied Mathematics Unit, Indian Statistical Institute The manuscript presents a protocol for the conduction of bed-load sediment transport experiments where the moving particles are tracked by image analysis. The experimental facility, the procedures for run realization and data processing, and finally some proof-of-concept results are presented here.