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<p>This paper constitutes a newly begun scientometric perspective on the global rainwater harvesting (RWH) literature in the 1994–2024 period alongside an integration of the young RWH system-micro-hydropower (MHP) connectivity. In contrast to earlier reviews, which focused either on RWH or small-scale hydropower, this review analyses how both fields overlap to encourage hybrid water-energy options, especially in a decentralised and rural context. In the multi-dimensional bibliometric analysis keyword clustering, author co-citation, and burst detection, this evaluation exposes hidden knowledge paths, research shortages, and developing interdisciplinary topics on integrated RWH-MHP systems. Covering 3,036 records from Web of Science, the results demonstrate that there has been a substantial increase in the number of publications in the previous decade, headed by China, the US, and India. Funding from&#xa0;key sponsors like the National Natural Science Foundation of China has significantly&#xa0;boosted this sector. Thematic trends reflect recent concentration on "green infrastructure," "mechanisms," and "water management," as well as issues highlighting technical factors such as energy conversion efficiency, flow regulation, and storage optimisation of hybrid systems. However, technology dissemination is limited by climate change, high costs of investment, and a&#xa0;lack of regulatory support. It is necessary to formulate standardised design frameworks with examples in the field and to develop stronger policy practice links to strengthen the water–energy resilience. Future research should focus on system optimisation, cost-effective transferring of technology, and cross-sectoral integration according to the sustainable development goals.</p>

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Technological trends in rainwater harvesting for micro-hydropower: a scientometric review

  • 期刊论文

  • 发表日期：

    2025年12月29日

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  • S. N. F. Abdullah,
  • M. K. A. Kamarudin,
  • N. A. Wahab,
  • N. Yaakub,
  • A. S. Mohd Saudi,
  • M. N. A. Rahman,
  • S. Sunardi,
  • F. Muhammad-Sukki,
  • I. N. Ismail

摘要

This paper constitutes a newly begun scientometric perspective on the global rainwater harvesting (RWH) literature in the 1994–2024 period alongside an integration of the young RWH system-micro-hydropower (MHP) connectivity. In contrast to earlier reviews, which focused either on RWH or small-scale hydropower, this review analyses how both fields overlap to encourage hybrid water-energy options, especially in a decentralised and rural context. In the multi-dimensional bibliometric analysis keyword clustering, author co-citation, and burst detection, this evaluation exposes hidden knowledge paths, research shortages, and developing interdisciplinary topics on integrated RWH-MHP systems. Covering 3,036 records from Web of Science, the results demonstrate that there has been a substantial increase in the number of publications in the previous decade, headed by China, the US, and India. Funding from key sponsors like the National Natural Science Foundation of China has significantly boosted this sector. Thematic trends reflect recent concentration on "green infrastructure," "mechanisms," and "water management," as well as issues highlighting technical factors such as energy conversion efficiency, flow regulation, and storage optimisation of hybrid systems. However, technology dissemination is limited by climate change, high costs of investment, and a lack of regulatory support. It is necessary to formulate standardised design frameworks with examples in the field and to develop stronger policy practice links to strengthen the water–energy resilience. Future research should focus on system optimisation, cost-effective transferring of technology, and cross-sectoral integration according to the sustainable development goals.