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 influenc...

We analyse spatial variability and different evolution patterns of snowpack in a mixed beech–fir stand in the central Pyrenees. Snow depth and density were surveyed weekly along six transects of contrasting forest cover during a complete accumulation and melting season; we also surveyed a sector unaffected by canopy cover. Forest density was measured using the sky view factor (SVF) obtained fro...

Previous studies have found that built-environment characteristics in large cities produce important effects of the urban heat island (UHI) and know horizontal space affected by canopy microclimate ranges from about 30–200 m, but there are few medium-sized cities. Therefore, this study investigates canopy-scale their correlation with Chiayi city, a tropical, city. Under 100 m buffer size, 2D 3D...

To quantify the ecosystem services of trees in urban environments, it is necessary to assess received direct solar radiation each tree. While Sky View Factor (SVF) suitable for assessing total incoming short- and longwave fluxes, its information limited specific points space. For a spatial analysis, sample area SVF. A new geometrical method, Area (AVF), calculation sunlit areas proposed. AVF ra...

A thermo-hygrometric analysis was carried out at 9, 12 and 16 hrs, under six groups of urban tree species with different levels shading, plus a lawn as control area, on hot humid day November 2018 in Campos dos Goytacazes, Rio de Janeiro. Air temperature relative humidity data were converted into apparent heat indexes (HI). The results obtained subjected to variance and, if significant, regress...

Trees play an important part in landscaping as well thermal environment adjustment. This study selected a satellite city of Sichuan Province China, Xindu, for field measurement about tree’s crown characteristics on their cooling performances five sunny summer days during August 2019. There were several parameters showing tree used, including canopying size (tree radius, TCR), geometry (the rati...

Abstract Real-time solar energy resources mapping is crucial for the development and management of power facilities. This study analyzes effects digital elevation model (DEM) resolution on accuracy surface insolation (insolation hereafter) calculated by Korea Meteorological Administration system, KMAP-Solar, using two DEMs different resolutions, 1.5 km 100 m. It found that KMAP-Solar yields sma...