基于公共健康风险感知的城市广场更新策略研究

在全球公共卫生传染性疾病事件频发背景下,广场空间既要满足人们的休闲娱乐需求,又要兼顾预防公共健康风险的要求。基于图像数据,通过机器视觉识别以及图像评分的方式探究海珠广场环境要素对公共健康传染性疾病风险感知的影响。结果表明,道路、人行道、建筑、栅栏、地形和人是影响公共健康风险感知的重要环境要素。其中,道路、人行道、建筑、栅栏和人与可控性风险感知呈显著负相关,与易染性和恐慌性风险感知呈显著正相关。地形与可控性风险感知呈显著正相关。基于此,提出更新策略:提升绿色空间品质,构建疗愈性户外环境;优化空间布局,营造弹性化的城市广场空间;优化人流量管理,发挥城市广场公共健康效应。

Urban Plaza Renewal Strategy Based on Public Health Risk Perception

In the context of frequent global public health events, the plaza space should not only meet people''s leisure and entertainment needs, but also take into account the prevention of public health risks. This study explores the impact of environmental elements of Haizhu Square on the perception of public health risk through machine vision recognition and image scoring, based on image data. The results show that roads, sidewalks, buildings, fences, terrain and people are important environmental elements that affected public health risk perception. Among them, roads, sidewalks, buildings, fences and people are significantly negatively associated with controllability risk perceptions, but positively associated with susceptibility and panic risk perceptions. Terrain is positively correlated with controllability risk perception. Based on the above, the optimization strategies are proposed: improve the quality of green space to build a healing outdoor environment, optimize the spatial layout to create a flexible urban plaza space, and promote the management of pedestrian flow to bring into play the public health effect of urban plazas.