Air Quality Visualization & Education Tool
The Gaussian plume model is one of the most widely used analytical models in air quality. It describes how a continuous emission from a point source disperses downwind, assuming the concentration profile across and vertically follows a Gaussian (normal) distribution.
| Class | Description | Conditions |
|---|---|---|
| A | Extremely Unstable | Strong solar radiation, light winds (<3 m/s) |
| B | Moderately Unstable | Moderate solar radiation |
| C | Slightly Unstable | Slight solar radiation |
| D | Neutral | Overcast or strong wind (>6 m/s) |
| E | Slightly Stable | Slight nighttime cooling |
| F | Moderately Stable | Clear sky, light winds at night |
This is a simplified educational model. Real-world air quality assessment uses AERMOD (EPA regulatory model) which accounts for terrain, building downwash, hourly meteorological data, and more complex chemistry. Concentrations shown are illustrative, not regulatory.