EXAMS: Exposure Analysis Modeling SystemThe Exposure Analysis Modeling System (EXAMS) is an interactive modeling system that allows a user to specify and store the properties of chemicals and ecosystems, modify either via simple commands, and conduct rapid evaluations and error analyses of the probable aquatic fate of synthetic organic chemicals.
EXAMS simulates an aquatic ecosystem tracing the path and behaviour of a toxic pollutant.
It has a database of toxic substances and a command-driven interface,
which allows for the definition of new substances and for modifiation
of the ecosystem definition.
EXAMS combines chemical loadings, transport, and transformation into a set of differential equations using the law of conservation of mass as an accounting principle. It accounts for all the chemical mass entering and leaving a system as the algebraic sum of external loadings, transport processes that export the compound from the system, and transformation processes within the system that convert the chemical to daughter products. The program produces output tables and simple graphics describing chemical exposure, fate, and persistence.
The EXAMS model system is available for microcomputer (DOS) systems
SOFTWARE AVAILABILITYThe program is available at:
Center for Exposure Assessment Modeling (CEAM)
AUTHORSLawrence A. Burns, Ph. D.
Environmental Research laboratory
U.S. Environmental protection Agency
Athens, Georgia 30613 USA
Estratto dalla banca modelli del progetto CEE GAIA INCO - www.ess.co.at/GAIA