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<p>Community greenways, as favoured activity spaces for the elderly, derive their core advantage from the spatiotemporal regulation of tree shade. By precisely modulating local microclimates and reducing surface and near-ground temperatures, they effectively mitigate the urban heat island effect while creating continuous, comfortable shaded environments. This provides seniors with safe, adaptable spaces for activity. The continuous distribution of shade not only significantly extends the duration of outdoor activities for the elderly, thereby promoting their physical rehabilitation and social interaction, but also effectively reduces the risk of falls by diminishing glare from intense sunlight. This confers distinct advantages in enhancing the health and well-being of the elderly population. This study, conducted in a test area in Northeast China, employed UAV oblique photography to collect data. Based on the spatio-temporal distribution of shade, it investigated the comfort level of greenway passage and designed age-friendly pathways. Key findings include UAV-derived tree height accuracy exceeded 91%, meeting forest stand information extraction requirements; large trees provided 3.1–6.9&#xa0;°C cooler temperatures than exposed areas, with shading effectiveness positively correlated with canopy closure; surface temperature ranking was bare soil &gt; concrete &gt; grass; integrating shadow simulation with GIS cost-path modelling enables creation of 28–30&#xa0;°C comfortable greenways. This study closely examines the spatio-temporal distribution of shade, thoroughly considers the practical needs of the elderly, and provides practical approaches and methodologies for selecting tree species, determining planting parameters, and planning shrubbery in age-friendly renovations of community greenways. It also offers scientific evidence for urban community planning management and the construction of an age-friendly society.</p>

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Research on the optimisation of age-friendly greenways in communities from the perspective of shadow spatial distribution

  • 期刊论文

  • 发表日期：

    2026年1月3日

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  • Xiaoqian Zu,
  • Wenhai Yu,
  • Yingyao An,
  • Yixuan Tang

摘要

Community greenways, as favoured activity spaces for the elderly, derive their core advantage from the spatiotemporal regulation of tree shade. By precisely modulating local microclimates and reducing surface and near-ground temperatures, they effectively mitigate the urban heat island effect while creating continuous, comfortable shaded environments. This provides seniors with safe, adaptable spaces for activity. The continuous distribution of shade not only significantly extends the duration of outdoor activities for the elderly, thereby promoting their physical rehabilitation and social interaction, but also effectively reduces the risk of falls by diminishing glare from intense sunlight. This confers distinct advantages in enhancing the health and well-being of the elderly population. This study, conducted in a test area in Northeast China, employed UAV oblique photography to collect data. Based on the spatio-temporal distribution of shade, it investigated the comfort level of greenway passage and designed age-friendly pathways. Key findings include UAV-derived tree height accuracy exceeded 91%, meeting forest stand information extraction requirements; large trees provided 3.1–6.9 °C cooler temperatures than exposed areas, with shading effectiveness positively correlated with canopy closure; surface temperature ranking was bare soil > concrete > grass; integrating shadow simulation with GIS cost-path modelling enables creation of 28–30 °C comfortable greenways. This study closely examines the spatio-temporal distribution of shade, thoroughly considers the practical needs of the elderly, and provides practical approaches and methodologies for selecting tree species, determining planting parameters, and planning shrubbery in age-friendly renovations of community greenways. It also offers scientific evidence for urban community planning management and the construction of an age-friendly society.