1. NAME AND TITLE

AIRBORNE: Airborne Contaminants Dispersion Code.

2. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

3. CODING LANGUAGE AND COMPUTER

FORTRAN IV; IBM 360/370.

4. NATURE OF PROBLEM SOLVED

AIRBORNE computes distributions of airborne pollutants. It was designed to simulate the effects of proposed charges on the environment, providing a means of modeling and displaying the effect of a source of airborne pollutants on a particular locality. A simple Gaussian plume model was used.

5. METHOD OF SOLUTION

AIRBORNE requires data describing a latitude and longitude grid on a section of the earth's surface and data describing and locating a pollutant source. All sources are assumed to be at the center of the cell in which they are located. It calculates the great circle distance (assuming the earth to be a sphere) from the center of the source cell to the center of a receiving cell and the compass bearing of the great circle at the source. The source strength, effective stack height, wind speed, and wind probability are used to calculate the concentration at the center of the receiving cell due to this particular source. This process is repeated for each cell in the grid.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

The packaged sample problem took 22 seconds on the IBM 360/75.

8. COMPUTER HARDWARE REQUIREMENTS

AIRBORNE was designed for the IBM 360 series computers, using 90 K core storage.

9. COMPUTER SOFTWARE REQUIREMENTS

A FORTRAN IV compiler is required.

10. REFERENCE

R. L. Stephenson, "A Program for Computing the Dispersion of Airborne Contaminants," ORNL-TM-4674 (September 1974).

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

September 1975.