ABSTRACT

A toxic chemical fate, transport and bioaccumulation system has been developed by linking EPA’s WASTOX FORTRAN code ArcView. The system, called GISTOX, is fully compatible with EPA’s BASINS database. River reach information, water quality data and point source loads are automatically extracted from the database. The system supports solids sorption, volatilization, biodegradation and hydrolysis fate processes. The present version of the system is restricted to steady state transport in one dimension. The bioaccumulation part of the model is set up using a preset food web structure consisting of benthic invertebrate, phytoplankton, Zooplankton, small fish and large fish.