Nomograms for calculating pollution within street canyons |
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| Institution: | 1. School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, China;2. Key Lab of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;3. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;4. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;5. Anhui Province Key Laboratory of Polar Environment and Global Change, University of Science and Technology of China, Hefei 230026, China;1. Missouri Public Service Commission, P.O. Box 360, Jefferson City, MO 65102-0360, United States;2. Department of Economics, University of Missouri, Columbia, 909 University Avenue Columbia, MO 65211-6040, United States |
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| Abstract: | The Environment Act 1995 has introduced the notion of local air quality management which requires that air quality in towns be reviewed and assessed. There is a need to identify those streets that are worst affected by vehicular pollutants. Such worst cases are likely to be narrow congested streets with tall buildings on each side. A nomogram presented here allows rapid screening of pollution in congested street canyons. The strong dependence on wind direction is reduced to the two extremes, namely wind along and wind across the canyon. Then canyon concentrations are estimated according to street geometry and traffic flow. The nomogram is designed for use by local authorities, is quick and easy to use, and paper or computer versions are available. It is suggested that detailed monitoring or modelling may only be required when simple screening methods predict high air pollution. |
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