1. NAME AND TITLE

ATM-TOX: An Atmospheric Transport Model for Toxic Substances.

2. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; IBM 3033.

4. NATURE OF PROBLEM SOLVED

ATM-TOX predicts concentration and deposition on the Earth's surface of airborne pollutants from point sources (such as smokestacks), line sources (such as rows of smelters) and area sources (such as landfills).

5. METHOD OF SOLUTION

ATM-TOX provides a means of calculating the ground-level air concentrations of trace contaminants from various sources and the deposition of those contaminants on a watershed. The subsequent movement of the contaminants through the watershed by hydrologic processes can then be traced with other models.

The updated version of ATM-TOX includes a wind profile, afternoon and nocturnal mixing heights, and first-order degradation of the airborne species. It calculates atmospheric concentration for both wetfall and dryfall.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running times for ATM-TOX.

8. COMPUTER HARDWARE REQUIREMENTS

ATM-TOX is operable on the IBM 3033 computer.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran IV compiler is required.

10. REFERENCE

R. J. Raridon, B. D. Murphy, W. M. Culkowski, M. R. Patterson, "The Atmospheric Transport Model for Toxic Substances (ATM-TOX)," ORNL/CSD-94 (November 1984).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which contains the source program, sample problem data, and sample JCL, plus output from the sample problem.

12. DATE OF ABSTRACT

October 1985.