Dispersion Modeling Calculator

Downwind concentration from AERMOD-style Gaussian dispersion.

Emission rate (g/s)

Wind speed (m/s)

Effective stack height (m)

Downwind distance (m)

Stability class (1=A…6=F)

Tab to move between fields

Ground concentration (µg/m³)

265.67

Max ground conc. (µg/m³)276.66

Max conc. distance (m)850

σy horizontal dispersion (m)38.5

σz vertical dispersion (m)24.4

Plume width at 10% (m)165.4

How to Use This Calculator

Enter Emission rate (g/s), Wind speed (m/s), and Effective stack height (m).
Set Downwind distance (m) and Stability class (1=A…6=F).
Review the Ground concentration (µg/m³) result.
Use Max ground conc. (µg/m³) and Max conc. distance (m) to inform your decision.

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