Lecture 7 Gaussian Plume Model

Front

The diagram represents the Gaussian plume model, which is used to describe the distribution of contaminants in the air. It includes key elements such as the plume centerline, wind direction, and various height measurements.

Back

Front

σz

Back

Vertical dispersion parameter (m)

Front

σy

Back

Horizontal dispersion parameter (m)

Front

To calculate the wind speed u at the effective stack height when unknown.

Back

Use Power law equation

Front

Exponent p values for wind speed calculation.

Back

Refer to the table for specific p values based on stability class and location type.

Front

Stability class F in rural areas.

Back

Exponent p value is 0.55.

Front

Moderately unstable

Back

Stability Class B

Front

Graph showing lateral diffusion (_y) vs. downwind distance from source for Pasquill's turbulence types.

Back

The graph illustrates the relationship between lateral diffusion and downwind distance for different stability classes: A (Extremely Unstable), B (Moderately Unstable), C (Slightly Unstable), D (Neutral), E (Slightly Stable), and F (Moderately Stable).