MY THINKING

by M. RAMACHANDRAN
(INDIA)

Why do you model for air quality?? What is important and what models do you use?

Barry's Response - The most popular choice for a long time was ISC3 or ISCPrime. This simple model allowed us to take emissions from one or more stacks, downwashed by buildings as appropriate and determine how it would scatter about the surrounding hillsides. RTDM would do similar calculations for steep hills and mountains.

Now we use CALPUFF,
which, essentially, does it all.