ERIC Number: ED084107
Record Type: Non-Journal
Publication Date: 1971
Reference Count: N/A
Simple Methods of Calculating Dispersion from Urban Area Sources.
Hanna, Steven R.
A simple but physically realistic model is shown to be adequate for estimating long-term average pollutant concentrations due to area sources in cities. In this model, the surface concentration is directly proportional to the local area source strength and inversely proportional to the wind speed. The model performs nearly as well as much more complex models that require the use of digital computers. In the rural areas adjacent to cities, long-term average pollutant concentrations can be estimated using a simple geometric model in which the source strength and concentration decrease exponentially with radial distance from the city center. The length scale of the concentration distribution is observed to be about twice the scale of the source distribution. (Author/RH)
National Technical Information Service, Springfield, Virginia 22151 (COM-72-10999, PC-$3.00 MF-$0.95)
Publication Type: N/A
Education Level: N/A
Authoring Institution: National Oceanic and Atmospheric Administration (DOC), Oak Ridge, TN. Air Resources Atmospheric Turbulence and Diffusion Lab.