CHARACTERISTICS OF MAXIMUM CONCENTRATIONS FROM MULTIPLE POINT SOURCES

A simple quasi-Newton numerical scheme is applied to determine the hyp othetical worst-case meteorology that will result in the maximum combi ned concentrations at any receptor location in air quality modeling ov er shea distances for multiple point sources. Also, a search procedure is suggested to investigate the combination of location and atmospher ic conditions of wind direction, wind speed, and stability that produc es the highest possible ground-level concentration, the so-called crit ical concentration. The proposed methodology may help in applications in design of stacks, air quality management. and air pollution episode control planning.