14. Dispersion Model Parameters - Part 1
The chapter explores box models for pollutant transfer in air, focusing on atmospheric stability, mixing height, and plume shapes related to environmental lapse rates. It also discusses the equations used to model pollutant dispersion, particularly emphasizing the role of advection and dispersion in pollutant transport, and the assumptions necessary for these models.
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What we have learnt
- Box models are foundational for understanding pollutant transfers in the atmosphere.
- Atmospheric stability and mixing height significantly influence pollution dispersion.
- Different plume shapes can be predicted based on environmental conditions, and dispersion models must appropriately include various processes.
Key Concepts
- -- Adiabatic Process
- A process in which no heat is transferred into or out of the system, characterized by changes in temperature due to pressure variations.
- -- Mixing Height
- The height at which the environmental lapse rate and the adiabatic lapse rate intersect, determining the volume in which pollutants are mixed in the atmosphere.
- -- Plume Shape
- The characteristic structure of a pollutant plume, influenced by the stability of the atmosphere and the height of the emission source.
- -- Fick's Law
- A principle describing the diffusion of substances, stating that the flux of a substance is proportional to the gradient of concentration.
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