Routing Graded Sediments in Streams: Formulations

A one-dimensional numerical model is developed for simulating the movement of well graded sediments through a stream network. The model is based on the physical processes governing the mechanics of sediment movement in alluvial channels. It incorporates the effect of sediment gradation on the stream's potential transport capacity. It also accounts for the effect of particle exchange between the sediment load and the bed, while simulating aggradation, degradation and armoring of the bed. The applicability of the model is restricted to noncohesive materials and relatively stable channel geometries. Any valid water routing algorithm can be used in simulating the movement of water.