Abstract

Sediment transport has been defined (Agricultural Research Service, 1976) as those processes by which sedimentary materials are removed from one location and transported to a downstream deposition site, from which a new cycle of sediment transport may start again. Sedimentary materials involved in transport processes may be clastic streambed material ranging in size from silt to boulders, or heterogeneous clay materials that move as discrete soil particles of widely-varying size, as flocs, or as the dispersed phase of a relatively stable suspension of near-molecular sized particles. Widely recognized physical sediment transport processes (Graf, 1971) are inception of particle motion, transport of material as bed load (particle traction and saltation) transport of material in suspension, and deposition of material, either by single particle settling or by flocculation.

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