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DFE World: Design & the Global Environment
Photograph of Nature
Air Pollution

Effective Stack Height

Mixing Height & Inversions

Model Output

Sensitivity Analysis


Stack Height

Stability Class


Central Campus Air Quality Model (CCAQM) Instructions


Sensitivity Analysis - Effective Stack Height

The effective stack height causes the pollution concentration to change at different receptors up to a certain point.  The figure below shows the effect of stack height on concentration at certain distances.


Sensitivity Analysis for Effective Stack Height (Point Source)


Concentration is reduced drastically by raising the stack from 100 to 200 meters.  However, beyond 200 meters, concentration falls off very slowly with increasing stack height.