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<p>This study conducts a comprehensive bibliometric and literature review analysis to map the evolution and current state of rainwater harvesting (RWH) research. The objectives are to identify major research topics, academic communities, and evolutionary trends, while also revealing barriers to RWH implementation and suggesting future research directions. By analyzing 2619 articles from the Web of Science database spanning 2000–2024, we employed co-occurrence analysis, cluster analysis, and a literature review to examine RWH research characteristics. Key findings indicate a steady increase in RWH publications, with the US and China leading in contributions. Six research clusters emerged, focusing on climate change impacts, water quality, system performance, GIS applications, urban stormwater management, and urban water supply. Despite progress, challenges such as economic feasibility, planning and design guidance, water quality, and social acceptance persist. The study provides a cohesive knowledge map of RWH research, highlighting the need for cross-national collaboration, innovative technologies, and policy incentives to overcome barriers and promote RWH adoption.</p> Graphical abstract <p></p>

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Global trends and future directions in rainwater harvesting research: insights from a joint bibliometric and literature review

  • 期刊论文

  • 发表日期：

    2026年1月2日

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  • Shiguang Chen,
  • Qi Li,
  • Hongwei Sun,
  • Xuebin Chen

摘要

This study conducts a comprehensive bibliometric and literature review analysis to map the evolution and current state of rainwater harvesting (RWH) research. The objectives are to identify major research topics, academic communities, and evolutionary trends, while also revealing barriers to RWH implementation and suggesting future research directions. By analyzing 2619 articles from the Web of Science database spanning 2000–2024, we employed co-occurrence analysis, cluster analysis, and a literature review to examine RWH research characteristics. Key findings indicate a steady increase in RWH publications, with the US and China leading in contributions. Six research clusters emerged, focusing on climate change impacts, water quality, system performance, GIS applications, urban stormwater management, and urban water supply. Despite progress, challenges such as economic feasibility, planning and design guidance, water quality, and social acceptance persist. The study provides a cohesive knowledge map of RWH research, highlighting the need for cross-national collaboration, innovative technologies, and policy incentives to overcome barriers and promote RWH adoption.

Graphical abstract