Prediction of bedload transport is important for hazard assessment and in engineering applications such as the planning and implementation of flood protection measures. Furthermore, a wide range of scientific disciplines such as geomorphology, sedimentology, and river engineering rely on bedload transport predictions for modelling work. Despite more than 100 years of active research, knowledge of bedload transport processes is still limited. This is especially true for coarse-bedded gravel rivers and torrents, i.e., high-gradient mountain streams. Bedload transport is typically very variable for given stream-flow conditions. Continuous and reliable measurements of bedload transport are difficult and challenging to obtain, but important to advance our understanding of sediment transport in mountain streams.
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