Geospatial big data-driven roof greening priority and benefit assessment in Hong Kong

IF 11.4 1区地球科学 Q1 ENVIRONMENTAL SCIENCES

Remote Sensing of Environment Pub Date : 2025-09-12 DOI:10.1016/j.rse.2025.115004

Jie Shao , Wei Yao , Lei Luo , Linzhou Zeng , Zhiyi He , Puzuo Wang , Xingjian Fu , Jianbo Qi , Huadong Guo

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引用次数: 0

Abstract

Green roofs constitute a critical component in enhancing urban sustainability and resilience, making the systematic assessment of roof greening initiatives a pivotal focus in urban research and planning. A thorough understanding of implementation priorities and potential benefits is essential for effectively promoting green roof adoption. As a multifaceted urban intervention, roof greening involves complex stakeholder coordination and requires comprehensive assessments across various urban development dimensions. Nevertheless, significant research gaps remain regarding the multi-criteria evaluation of building-level roof greening priorities and their associated benefits at urban scales. Here, using geospatial big data, we conduct an urban-scale assessment of roof greening at a single building level in Hong Kong from a sustainable development perspective. We identify that 85.3 % of buildings reveal potential and urgent demand for roof greening (average priority>0.6). We further find green roofs could increase greenspace coverage rate around buildings by 65.7 %, produce hundreds of millions (HK$) in economic benefits annually, and contribute to approximately 0.15 °C urban temperature reduction and 0.8 % annual carbon emission offsets. Our study offers a comprehensive assessment of roof greening, which could provide a reference for sustainable development in cities worldwide, from data utilization to solutions and findings.

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地理空间大数据驱动的香港屋顶绿化优先次序及效益评估

绿色屋顶是增强城市可持续性和弹性的关键组成部分，使屋顶绿化倡议的系统评估成为城市研究和规划的关键焦点。全面了解实施重点和潜在利益对于有效促进绿色屋顶的采用至关重要。屋顶绿化作为一项多方面的城市干预，涉及复杂的利益相关者协调，需要在城市发展的各个方面进行综合评估。然而，关于建筑屋顶绿化优先级的多标准评价及其在城市尺度上的相关效益，仍存在显著的研究空白。在此，我们利用地理空间大数据，从可持续发展的角度对香港单一建筑层面的屋顶绿化进行了城市尺度的评估。我们发现，85.3%的建筑物显示出屋顶绿化的潜在和迫切需求（平均优先级为0.6）。我们进一步发现，绿色屋顶可使建筑物周围的绿色空间覆盖率增加65.7%，每年产生数亿港元的经济效益，并有助于降低约0.15°C的城市温度和每年抵消0.8%的碳排放。本研究对屋顶绿化进行了全面的评估，从数据利用到解决方案和结果，为全球城市的可持续发展提供了参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Remote Sensing of Environment 环境科学-成像科学与照相技术

CiteScore

25.10

自引率

8.90%

发文量

455

审稿时长

53 days

期刊介绍： Remote Sensing of Environment (RSE) serves the Earth observation community by disseminating results on the theory, science, applications, and technology that contribute to advancing the field of remote sensing. With a thoroughly interdisciplinary approach, RSE encompasses terrestrial, oceanic, and atmospheric sensing. The journal emphasizes biophysical and quantitative approaches to remote sensing at local to global scales, covering a diverse range of applications and techniques. RSE serves as a vital platform for the exchange of knowledge and advancements in the dynamic field of remote sensing.