Sediment transported along the bed of a river by rolling, sliding or saltating.

That part of the sediment load in which the particles of material move on or near the stream bed.

Sedimentary material subject to transport by flowing water (e.g. currents) which is moved by rolling, pushing, and saltation. The size of particles moved is proportional to the strength of water movement.

Sediment grains transported at the base of a river etc where the grains are moving by either rolling, sliding or saltation (bouncing).

sediments too heavy to be transported constantly but which shift during high flows.

Sediment or other material that slides, rolls, or bounces along the streambed or channel bed of flowing water.