ROADWAY-2: A Model for Pollutant Dispersion near Highways |
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| Authors: | K. Shankar Rao |
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| Affiliation: | (1) Atmospheric Turbulence and Diffusion Division, Air Resources Laboratory, NOAA, Oak Ridge, TN, U.S.A. |
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| Abstract: | The formulations and evaluation of ROADWAY-2, a near-highway pollutant dispersion model, are described. This model incorporates vehicle wake parameterizations derived from canopy flow theory and wind tunnel measurements. The atmospheric velocity and turbulence fields are adjusted to account for velocity-deficit and turbulence production in vehicle wakes. A turbulent kinetic energy closure model of the atmospheric boundary layer is used to derive the mean velocity, temperature, and turbulence profiles from input meteorological data. ROADWAY-2 has been evaluated using SF6 tracer data from General Motors Sulfate Dispersion Experiment. The model evaluationresults are presented and discussed. |
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| Keywords: | air pollution dispersion model wake parameterizations SF6 tracer data model evaluation |
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