Abstract:
The purpose of this study is the investigation of resistance to flow and sediment transport in
aggrading channels generated by overfeeding. A series of aggradation experiments were carried
out by overfeeding sediment load to a movable bed channel previously maintained in
equilibrium. The bed and water surface profiles were recorded and the sediment transport rate
was measured. These data were used to i) study the time evolution of resistance to flow during
the transient situation generated by overfeeding and to ii) check the applicability of the sediment
transport model suggested by Yen et al. to the observed non-equilibrium sediment transport
situation. As a consequence of this analysis, a slightly different version of the model is
suggested and a new relation for the calculation of the velocity of the deposition front is proposed.
