ROADWAY-2: A MODEL FOR POLLUTANT DISPERSION NEAR HIGHWAYS

摘要

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 SF_6 tracer data from General Motors Sulfate Dispersion Experiment. The model evaluation results are presented and discussed.