Enhancing Dispersion: Flow Obstructions

  • The turbulent wake behind a building helps mix pollutants to the ground that might not have been there normally, in a stable atmosphere.
  • Downwash is especially bad when there are pollution sources on the top of the building.
  • It is important to get the pollution emitted high enough above the building so that it does not get caught in the downwash and get carried down to the ground