Book excerpt: Contains 43 papers from the December 1993 symposium, reprinted from Marine and Freshwater Research 46(1), covering scientific and technical aspects of different types of aquatic systems. Sections on sediment-water processes; contaminant accumulation, distribution, and remediation; material cycling; bioavailability and effects of contaminants on biota; and sediment dynamics in lakes, rivers, and coastal systems highlight developments in the uptake and release of trace minerals, hydrological and biogeochemical components of contaminant transport, and risk assessment. No index. Distributed by ISBS. Annotation copyrighted by Book News, Inc., Portland, OR