Izvorni znanstveni članak
URBAN HPAC AND A SIMPLE URBAN DISPERSION MODEL COMPARED WITH THE JOINT URBAN 2003 (JU2003) FIELD DATA
Steven Hanna
; Hanna Consultants, Kennebunkport, Maine, USA
Ian Sykes
; Sage Management, Princeton, NJ, USA
Joseph Chang
; Fairfax, VA, USA
John White
; US Army Dugway Proving Ground, UT, USA
Emmanuel Baja
; Harvard School of Public Health, Boston, MA, USA
Sažetak
The Hazard Prediction and Assessment Capability (HPAC) dispersion model is widely used by the U.S. Department of
Defense and the results of previous evaluations have been presented at Harmonization conferences. The version of its diagnostic
wind model that is applied to urban areas has been significantly updated to remove biases in wind speed estimates, requiring reevaluations
with urban tracer data sets such as the Joint Urban 2003 (JU2003) data base. For comparison purposes, a simple
Gaussian-format urban dispersion model has been run for the same JU2003 data base. The simple urban model has previously been
evaluated with the Madison Square Garden 2005 (MSG05) data. The evaluations focus on 30-minute averaged (1) arc maximum
concentrations and (2) concentrations paired in space. It is shown that the revisions to the diagnostic wind model in urban HPAC
have resulted in improved performance. Similar good performance is found for the simple urban dispersion model, although it has
more errors for off-centerline and upwind receptors in the downtown area.
Ključne riječi
Urban dispersion; Model evaluation; Joint Urban 2003 field experiment; HPAC model
Hrčak ID:
64265
URI
Datum izdavanja:
12.12.2008.
Posjeta: 960 *