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<p>Surface water bodies (SWBs) in cities, such as Lakes, play a vital role in providing ecosystem services crucial for human well-being. SWBs have significance in drinking water, agriculture practices, maintaining biodiversity, impacting the ecosystem and regulating climate. This paper outlines a framework for analyzing the decline of surface water bodies (SWBs) in South Asian cities, focusing on Bengaluru, India’s largest tech city, facing SWB loss due to rapid urbanization and population growth. The study examines the state of urban SWBs through a multi-parameter analysis on a cloud-based platform (Google Earth Engine) for a period of 28&#xa0;years (1992–2020). Macro-level insights are gained using a SWB frequency analysis, revealing significant downward trends in most SWB parameters. Micro-level analysis links these trends to precipitation and urbanization, finding a positive correlation between precipitation and SWB area/number. The small SWBs are more susceptible to drying up during low rainfall, indicating their vulnerability to climate variations. In contrast, large SWBs are affected by anthropogenic factors like inadequate solid waste management and encroachment over the city’s catchment areas. Since most rapidly growing South Asian cities have a similar urban growth pattern, the study drew parallels between their SWB situations and the analysis presented in this paper. The study finally offers policy interventions and valuable insights for planning SWB rejuvenation efforts in rapidly growing cities. The study is aligned with the United Nations’ Sustainable Development Goals 11 and 15.</p>

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Assessing Surface Water Resilience in India’s Largest Tech City: Remote Sensing Insights into Urbanization and Climate Change Impacts

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • Anugya Shukla,
  • Eswar Rajasekaran,
  • RAAJ Ramsankaran

摘要

Surface water bodies (SWBs) in cities, such as Lakes, play a vital role in providing ecosystem services crucial for human well-being. SWBs have significance in drinking water, agriculture practices, maintaining biodiversity, impacting the ecosystem and regulating climate. This paper outlines a framework for analyzing the decline of surface water bodies (SWBs) in South Asian cities, focusing on Bengaluru, India’s largest tech city, facing SWB loss due to rapid urbanization and population growth. The study examines the state of urban SWBs through a multi-parameter analysis on a cloud-based platform (Google Earth Engine) for a period of 28 years (1992–2020). Macro-level insights are gained using a SWB frequency analysis, revealing significant downward trends in most SWB parameters. Micro-level analysis links these trends to precipitation and urbanization, finding a positive correlation between precipitation and SWB area/number. The small SWBs are more susceptible to drying up during low rainfall, indicating their vulnerability to climate variations. In contrast, large SWBs are affected by anthropogenic factors like inadequate solid waste management and encroachment over the city’s catchment areas. Since most rapidly growing South Asian cities have a similar urban growth pattern, the study drew parallels between their SWB situations and the analysis presented in this paper. The study finally offers policy interventions and valuable insights for planning SWB rejuvenation efforts in rapidly growing cities. The study is aligned with the United Nations’ Sustainable Development Goals 11 and 15.