The 29 papers in this volume reflect the topical and geographic diversity of exciting research conducted by fluvial sedimentologists at the beginning of the 21st century. Themes represented in this volume include (a) flow, sediment transport, and bedform dynamics, (b) characteristics of modern fluvial landforms, environments and systems, (c) physical analogue and numerical modeling of fluvial systems, (d) the responses of Quaternary fluvial systems to climate change, active tectonics, and/or sea-level change, and (e) characteristics of pre-Quaternary fluvial deposits and evolution of pre-Quaternary fluvial systems.