The Gaussian plume model assumes what kind of pollutant dispersion?

The Gaussian plume model is grounded in the assumption of symmetrical dispersion of pollutants in the atmosphere. This model portrays the dispersion of a plume of pollutants released from a point source as it travels downwind, assuming a bell-shaped distribution of concentration.

The symmetry in the model implies that the concentration of pollutants will decrease with the distance from the centerline of the plume in a predictable manner, forming a Gaussian curve when plotted. This characteristic is important because it simplifies the predictions made about pollutant concentrations at various points downwind, allowing for more straightforward calculations in environmental assessments.

In practical terms, the model assumes equal dispersion of pollutants in both lateral and vertical directions, leading to the symmetrical shape of the concentration distribution. This symmetry is a critical aspect that ensures the Gaussian plume model can be reliably used in atmospheric dispersion modeling and environmental impact studies.