Influence of Urban Geometry on Thermal Environment of Urban Street Canyons in Hong Kong

Hong Kong is a typical high-density city in subtropical climate region, and deep street canyons are among the main features of its urban planning. How geometry influences thermal environment this has become hot topic these days. The height-to-width ratio (H/W) sky view factor (SVF) commonly used to indicate outdoor performance, while previous studies rarely analysed importance bias two influencing factors systematically context. To fill research gap, paper, we chose four sites as objects. Firstly, conducted field investigation calculate (H/W SVF) then measurements collect climatic data, including air temperature, wind speed, relative humidity, finally regression analyse correlation between H/W, SVF, temperature. results following: (1) There greater H/W temperature than SVF by analysis, more effective at improving within canyons. (2) After measurements, it was found that measurement 0.60 6.02, with an average 2.13. (3) In study area, 2.31–2.48 3.35–3.60 had positive dominant influence on 2.09–2.31 > 3.60 inversely related conclusions can provide support for planning Kong.