Bar pattern and sediment sorting in a channel contraction/expansion area: Application to the Loire River at Bréhémont (France)

Bars are large sediment deposits alternating with deeper areas that arise from alluvial river bed instability and forcing. The present study aimed at investigating the combined influence of flow and longitudinal width variations on the co-evolution between bar pattern and sediment sorting in a sandy-gravel river reach. To this goal, a fully...