重庆市桥下绿地冬季小气候与游憩行为的关联性研究

Study of the Connection between Winter Microclimate and Recreational Behavior in Underpass Green Spaces in Chongqing

山地城市重庆冬季日照少,相对湿度高,立交桥下边角地常被建成供居民游憩健身的桥下绿地。通过观测冬季重庆两处滨江桥下绿地晴雨天不同空间小气候特征和游憩行为并探讨其关联性,发现重庆冬季不同景观空间小气候和热舒适度波动幅度小于夏季;桥下绿地冬季雨天相对湿度多在80%以上,大部分空间体感寒冷;虽然桥阴空间降低了太阳辐射、气温和热舒适度,但桥阴空间的使用受天气影响较小,休息日雨天的使用者相比工作日晴天多,且冬季无论晴雨天,热舒适度较高的桥阴空间利用率更高。提出冬季桥下绿地游憩空间的舒适性设计策略,以期从小气候适应性角度提升桥下绿地的利用率。

Chongqing,a mountainous city,is featured with limited sunlight and high relative humidity in winter.The corner spaces under overpass bridges are often built into green spaces for the recreation and exercise of residents.By examining the microclimate characteristics and recreational activities in two riverside underpass green spaces in Chongqing during both sunny and rainy winter days and exploring their relationship,it is found that the fluctuation range of microclimatic conditions and thermal comfort in different landscape spaces in Chongqing during the winter is smaller than in the summer.The underpass green space has a high relative humidity of 80% or more on rainy days in winter,and most of the space is physically cold.Although overpass shadow spaces reduce solar radiation,temperature,and thermal comfort,their usage is less affected by the weather.On rainy weekends,there are more users compared to sunny weekdays,and in the winter,regardless of whether it's sunny or rainy,the utilization rate of overpass shadow spaces with higher thermal comfort is higher.Comfort design strategies for underpass green spaces in winter are proposed in order to improve the utilization of underpass green spaces from the perspective of microclimate adaptation.