Abstract
Three-dimensional numerical models were used to simulate wind and turbulence distributions in the Mohave Valley and plume transport from the Mohave Power Project, located at approximately 120 km south-south-east of Las Vegas, NV. The Modeled meteorological variables were input to a three-dimensional random-puff diffusion model to simulate observed tetroon trajectories and ground-level concentrations of SO2 in the Valley. Numerical simulations indicated that hourly averaged surface concentrations could differ considerably, even when the mean and turbulence variables of the airflows were kept statistically identical. The concentration variations resulted from the differences in initial turbulence velocity and inhomogeneous distributions of airflows that each puff encountered during transport. Because the range of variations is, in general, unknown for both measurements and simulations, it is difficult to assess the representativeness of the observed and simulated values, and therefore to evaluate quantitatively the modeled concentrations against observations.
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