Sediment distribution and connectivity in mountain gravel river with grade control structures

[Display omitted] •Sediment distribution in river with grade control structures (GCSs) was examined.•The particle size distribution is complex, there is no tendency to fining or coarsening.•There is no armour layer on most reaches between GCSs.•Sediment transport occurs frequently, but over short distances.•Transport and morphology changes depend on local hydraulic and geometric conditions.