Twentieth-century channel change on the Dunajec River, southern Poland: Patterns, causes and controls

This study shows that despite the overall tendency to incision over the 20th century, considerable differences in the timing and course of channel changes occurred between particular river reaches due to variable human impact and local geological and geomorphological conditions. The main phase of channel incision took place progressively later in the upstream direction. However, upstream progression of bed degradation from the already incised downstream reaches was precluded by the Rożnów Dam and bedrock-controlled reaches. Where bed material flushed out from an incising upstream reach had been introduced into an artificially narrowed channel of high transport capacity, it was easily transferred downstream and could not restore the downstream reach to its pre-channelization vertical position.