id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-022158-32pe8ou0	Yuan, Chao	Empirical Morphological Model to Evaluate Urban Wind Permeability in High-Density Cities	2018-01-16		.txt	text/plain	5770	277	52	In this chapter, a high-resolution frontal area density (FAD) map that evaluates urban permeability was produced using an empirical model, which takes into account the heterogeneous urban morphology and local wind availability. This study first correlates the pedestrian-level wind environment with λ f calculated at the podium layer, and then establishes an understanding of surface roughness and urban morphology based on ground coverage ratio (GCR), a term familiar to urban planners, with λ f to simplify the practical application of the understanding for professional use. Furthermore, compared with the traditional method of calculating frontal area density, the new method can alleviate the underestimation of mapping urban surface roughness in high-density cities with large and closely packed buildings. As shown in Fig. 2 .13a, the map of the frontal area density (0-15 m) depicts the local wind permeability at the podium layer in the Kowloon Peninsula and Hong Kong Island.	./cache/cord-022158-32pe8ou0.txt	./txt/cord-022158-32pe8ou0.txt