1. NAME AND TITLE

UTMTOX: Unified Transport Model for Toxic Materials.

2. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

Fortran; Vax 8600.

4. NATURE OF PROBLEM SOLVED

UTMTOX is a unified transport model for toxic materials. It combines hydrologic, atmospheric, and sediment transport in one computer code and extends the scope to predict the transport of not only trace metals but also many chemical compounds, including organics.

UTMTOX is capable of calculating 1) the atmospheric dispersion of up to 20 chemicals from a maximum of 10 point, 10 line, and 10 area sources; 2) deposition of one chemical at a time in both wet and dry form on foliage or the surface of the earth; 3) surface flow and erosion; 4) percolation through the soil to a stream channel; and 5) flow in the stream channel to the outfall of a watershed.

5. METHOD OF SOLUTION

UTMTOX calculates rates of flux of chemicals from release to the atmosphere, through deposition on a watershed, infiltration, and runoff from the soil to flow in the stream channel and the associated sediment transport. From these values, mass balances can be established, budgets for the chemical can be made, and concentrations in many environmental compartments can be estimated. Since the coupling is established among three major submodels, they can share data.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

The sample problem compiles, links, and executes in 7 wall clock minutes.

8. COMPUTER HARDWARE REQUIREMENTS

UTMTOX is operable on the Vax 8600 computer.

9. COMPUTER SOFTWARE REQUIREMENTS

UTMTOX runs under the VMS Version 4.5 Operating System and compiles using the Fortran Version 4.6 Compiler with the default /F77 and /Optimize switches.

10. REFERENCE

M. R. Patterson, T. J. Sworski, A. L. Sjoreen, M. G. Browman, C. C. Coutant, D. M. Hetrick, B. D. Murphy, R. J. Raridon, "A User's Manual for UTM-TOX, the Unified Transport Model," ORNL-6064 (December 1984).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which contains the source code and sample problem input and output.

12. DATE OF ABSTRACT

July 1986, August 1987.