열환경 개선을 위한 가로녹지 조성 위치에 따른 설계전략†

초록

This study aims to determine the most efficient location for creating additional green space in urban areasexperiencing high heat stress to improve the thermal environment. Specifically, we propose the green spacelocation with the greatest cooling effect by considering the thermal environment characteristics based on thestreet canyon’s aspect ratio and road orientation. Daegu Metropolitan City, in South Korea, was selected asthe study area, and eight scenarios were designed to reflect road directions and additional green spacelocations. To analyze changes in the thermal environment at the street level, we employed ENVI-met, athree-dimensional micro-climate simulation software. The results indicated that the optimal location of greenspaces for reducing air temperature and improving thermal comfort varies depending on street orientation andtime of day. For air temperature reduction, adding green space to the center of the road was most effectivein decreasing both daily and daytime mean temperatures in east–west and north–south oriented streetcanyons. Regarding thermal comfort, installing green spaces on the northern sidewalk in east–west orientedstreet canyons significantly improved thermal comfort during the entire daytime period. In contrast, for north–south oriented street canyons, thermal comfort was more effectively enhanced by placing green spaces onthe western sidewalk during the morning and on the eastern sidewalk in the afternoon.

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