The 12th International Symposium on the Interactions between Sediment and Water is scheduled for 19-23 June 2011 in Dartington, Devon, UK. The following Conference themes are proposed to explore the state-of-the-art in sediment-water science, from catchment to coast, and its contribution towards sustainable management of water-sediment systems: Nutrient and pollutant fluxes in natural and engineered aquatic systems; Role of biota in water-sediment interactions of marine and freshwater environments; New technologies for advancing sediment-water science from micro to catchment scale; Adaption of sediment-water systems to climate change risks; and Restoration of disturbed aquatic systems.