Analysing the magnitude-frequency relations of erosion, transport and deposition processes is a classic theme within fluvial research. Hydromorphology, dealing with the physical structure and formative hydrological processes of fluvial systems is an established concept, but has been given new currency by its prominent role within the EC's Water Framework Directive (WFD). Linking sediment dynamics to the hydromorphology, and by extension to the eco-hydrology of fluvial systems, is thus a key concept underlying the ICCE IAHS Symposium to be held in Dundee, Scotland 3rd - 7th July 2006. Four inter-related themes will provide the framework within which to share new research findings and inform best practice in terms of policy and management applications. Contributions are invited across the field of sediment dynamics particularly focussing on the role of extreme events in terms of sediment production, geochemical fluxes and hydromorphological change. Spatial and temporal patterns of storage will also be addressed in terms of residence times and biogeochemical cycling of nutrients, contaminants and organic carbon. Unlocking the record contained in fluvial sinks, such as floodplains and lake sequences, offers scope to reconstruct long-term catchment sediment fluxes and elucidate the role of land-use and climate change processes on sediment delivery. The final session will consider the linkages between sediment transport, hydromorphology and aquatic ecology in the context of developing tools to meet policy needs and more generally promoting the sustainable development of fluvial systems.