Thresholds in small rivers? Hypotheses developed from fluvial morphological research in western Germany

This article is in the special issue (The fluvial system — Research perspectives of its past and present dynamics and controls), which is comprised of selected presentations given at the international conference “The fluvial system — past and present dynamics and controls” in Bonn, May 2005. It was sponsored by 12 international and national organisations, PAGES' LUCIFS group being one of them.