Abstract
The influence of
reservoir on fluvial processes have been marked, on the one hand, by the
stoppage of sediment transport (suspended- and bed-load) accumulated in
reservoir, and on the other, renewal it’s on the way of the channel-bed erosion
below the dam. The irreversible channel erosion, very often, is increase by
24-hours fluctuation of water level, caused by electro-power-station work. This
process, together with the changes of hydrodynamic river conditions, effect on
sediment transportation ‑ finally, is creating a new channel
transformation. The explanation of reasons and effects stoppage of sediment
transport by dams is the main aim of the paper. Moreover, the qualitative and
quantitative channel changes below the dams are considered. The influence of
channel transformation on economy and ecology were presented. The study based
on access literature of world and on investigations carried out in Lower Vistula channel downstream from the
Keywords: fluvial processes, bed (deep) erosion, channel incision, sediment transport, bedload, suspended load, channel transformation, reservoir accumulation, hydrological regime, dams, reservoirs, Włocławek Reservoir.