The papers appearing in this volume reflect the current attention in sediment/water science to five main topics of investigation: Sediment dynamics in estuaries, coastal waters, lakes, reservoirs and rivers; Sediment-associated biological processes; Contaminant accumulation, distribution and geochemistry; Fluxes from sediments; and Element cycling. Contributors address sediment/water interactions related to both fresh and salt water conditions. Proceedings of the Fifth International SymposiumPreface. Sediment Dynamics in Estuaries and Coastal Waters. Sediment Transport and Deposition in Lakes and Reservoirs. Microbial Processes. Interactions between Sediments and Benthic Organisms. Sediment Bioassays. Biological Processes. Sediment-Water Interactions. Element Cycling. Contaminant Accumulation, Distributions and Geochemistry. Management.