Citation

Ng E, Yuan C, Chen L, Ren C, Fung JCH. Landsc. Urban Plann. 2011; 101(1): 59-74.

Affiliation

Department of Mathematics, The Hong Kong University of Science and Technology, Hong Kong.

Copyright

(Copyright © 2011, Elsevier Publishing)

DOI

10.1016/j.landurbplan.2011.01.004

PMID

32287617

PMCID

PMC7127139

Abstract

In this study, a high-resolution frontal area density (FAD) map that depicts the surface roughness of urban Hong Kong is produced using a mapping method that takes into account the dense urban morphology and the site wind availability of the territory. Using the MM5/CALMET model simulated wind data of Hong Kong, the FAD map of three urban zones are calculated: podium (0-15 m), building (15-60 m), and urban canopy (0-60 m). The wind tunnel test data is used to correlate the FAD understanding of the three zones. The grid sensitivity test indicates that 200 m × 200 m is the reasonable resolution for the FAD map; the test also establishes that the lower urban podium zone yields the best correlation with the experimental data. The study further establishes that the simpler two-dimensional ground coverage ratio (GCR), which is readily available in the planning circle, can be used to predict the area's average pedestrian level urban ventilation performance of the city. Working with their inhouse GIS team using available data, it allows the planners a way to understand the urban ventilation of the city for decisions related to air paths, urban permeability and site porosity.

Copyright © 2011 Elsevier B.V. All rights reserved.

Language: en

Keywords

Frontal area density; Urban planning; Urban roughness; Urban ventilation