Experimentally determined distribution of granular-flow characteristics in collisional bed load transport Václav Matoušek, Štěpán Zrostlík, Luigi Fraccarollo, Anna Prati and Michele Larcher EPJ Web Conf., 180 (2018) 02061 Published online: 04 June 2018 DOI: 10.1051/epjconf/201818002061