Ecology and analysis of trace contaminants. Progress report, January 1973- -September 1973

A major effort in the ORNL Ecology and Analysis of Trace Contaminants program has been concerned with the development of a Unified Transport Model (UTM) which can be used to describe and predict the transport and fate of trace contaminants through the atmospheric, terrestrial, and aquatic environments. In concept the air, land, and aquatic systems are represented by three major model components, designed to be run in sequence. A suite of compatible submodels that can be assembled into a UTM to meet specific user requirements, (i.e., to meet researcher needs or management needs), was developed. This research has required evaluation and modification of existing models, development of new models, and application of the UTM and/or its components. (auth)