GGSD Program Details for AT123D Version 2.1

AT123D Version 2.1

Category	Contaminant transport (3D)
Platform	DOS
Status	Public domain
Description	AT123D is a generalized three-dimensional groundwater transport and fate model. It simulates contaminant transport under one-dimensional groundwater flow. Transport and fate processes simulated include advection, dispersion, adsorption and biological decay. Contaminant transport can be simulated with biodegradation simulated as a first-order decay process. It can use the time-dependent contaminant releases from the SESOIL vadose zone model as load to groundwater. Results can be used to estimate how far a contaminant plume will migrate and can be compared to groundwater standards to evaluate risk at specific locations and times. It was developed by G. T. Yeh (1981) at Oak Ridge National Laboratory. Significant modifications to the free version, were made by John Seymor (1982), Darryl Holman (1984) and Howard Trussell, (1986) of the University of Wisconsin-Madison. Includes a 27-page user's guide and sample input files. The user's guide contains a description of the model input parameters and model results.
Cost	Free on WWW
Data formats supported	None stated
Supplier in United States of America	Environmental Software Consultants, Inc.