To the problem of channel landforms deformation in the mountain and semimountain rivers

Abstract

On the basis of alluvial heavy fraction analysis and long-term stationary observations of channel landforms movements the high stability of landforms was revealed in the stretches of straight or meandering river channel. This may be explained by silt dynamics within the strict frames of erosional relief of valley's bedrock. The lateral deformations of channel landforms and movements of accumulation and erosion sites occur in the places of branchy channel. Anabranches are the ways of bed load transport, where exchange of moving sediment and one accumulated in the channel forms takes place.