Thanks your references. We already have been using developed softwares to predict pollutant distirbution. My question is very specific to take some critical inputs for softwares.
When exhaust gas speed and volume from the stack in the natural-draft cooling tower is less than that from the natural-draft cooling tower, and the pollutants are assumed passive (no reactive), pollutants disperse from the natural-draft cooling tower.
Please refer to Handbook on Atmospheric Diffusion, Hanna et al.(1982) US DOE.