街景围合度与城市风环境的量化关系研究——以武汉市夏季为例

RESEARCH ON THE QUANTITATIVE RELATIONSHIP BETWEEN STREETSCAPE ENCLOSURE AND URBAN WIND ENVIRONMENT:TAKING THE SUMMER IN WUHAN AS AN EXAMPLE

通风对于武汉这类夏季炎热城市的热环境改善至关重要。本文尝试借助街景开放数据,利用图像分割法处理街景图片,得出武汉地区的典型城市空间中,建筑、植物、柱体、人、车辆等因素对街道围合度的影响,同时对这些城市节点进行气象参数的观测,进行归一化处理。通过定量分析不同类型城市空间围合度与风速归一值之间的关联,提出有效改善城市风环境的方法,对城市通风的规划方式提出建议及策略。

Ventilation is very important for the improvement of thermal environment in hot summer cities like Wuhan. This paper attempted to use the image segmentation method to process streetscape pictures by means of streetscape open data, and found the influence between the enclosure degree and the factors in the typical urban space in Wuhan, such as buildings, plants, columns, people, vehicles. Then the observation of meteorological parameters of these urban nodes and the normalization were done. The correlation between the enclosure degree and the wind speed measurement normalization value of the measurement point was quantitatively analyzed. The relationship between the different types of space enclosure and the wind speed normalization value was quantitatively analyzed, and the method for improving the urban wind environment was effectively proposed. Suggestions and strategies for ventilation in urban planning was deduced.