Extended Abstract (368K)J5.3
Testing of the QUIC-PLUME model with wind-tunnel measurements for a highrise building
Michael D. Williams, LANL, Los Alamos, NM; and M. Brown, D. Boswell, and B. Singh
A fast running, urban atmospheric plume transport and dispersion model is needed for many aspects of preparation, training, assessment, and response in case of a terrorist CB incident in a city. We are developing the QUIC (Quick Urban & Industrial Complex) system to meet these needs. The dispersion model, QUIC-PLUME, has been based on a non-standard version of the Lagrangian random-walk equations that allows it to account for horizontally inhomogeneous turbulence found in built-up areas. QUIC-PLUME has been revised to provide a better treatment of non-local mixing, and the turbulence induced by non-zero vertical winds or wind speed gradients in the horizontal plane. We have compared the model to wind tunnel experimental data for a release downwind from a highrise building. The model does a good job of describing measured concentrations on the back wall of the building and along the downwind axis of the building. For example, over 75% of the simulated , down-axis concentrations are within a factor of two of the measured concentrations at the same point. The vast bulk of the simulations that are not within a factor of two of the measurements are at very low concentrations where the statistical fluctuations are large.
Joint Session 5, Fast Response Urban Dispersion Models (Joint between the Fifth Symposium on the Urban Environment and the 13th Conference on the Applications of Air Pollution Meteorology with the A&WMA)
Wednesday, 25 August 2004, 3:30 PM-4:45 PM
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