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<p>Asansol Municipal Corporation (AMC) faces increasing challenges in water resource management due to population growth and environmental changes. Rooftop rainwater harvesting (RRWH) presents a viable solution to enhance urban water sustainability by addressing water scarcity, supporting groundwater recharge, and reducing dependence on conventional water sources. This study explores the feasibility of RRWH in AMC by analysing local meteorological data, including average rainfall and distribution patterns, and assessing the suitability of rooftops in residential, commercial, and institutional buildings. RRWH systems offer multiple benefits. They alleviate pressure on municipal water supplies by providing an alternative source for non-potable uses along with the contribution to groundwater recharge. Thirty years of rainfall data were analyzed using the Mann–Kendall test to assess rainfall patterns, while Google Earth Pro was employed to accurately measure roof areas. The research further examines the practical aspects of RRWH implementation, including system design, maintenance, and cost considerations. A cost-benefit analysis evaluates the economic viability by comparing initial investment costs with operational expenses. The estimated household rainwater harvesting capacity (115.34&#xa0;m³) surpasses the annual non-potable household demand (97.2&#xa0;m³), leaving a surplus of 18.14&#xa0;m³ for groundwater recharge. A cost-benefit analysis recommends a gravity-fed rooftop rainwater harvesting system using plastic tanks and PVC pipes as a sustainable solution for AMC. By providing a detailed analysis of implementation and cost considerations, the research offers valuable insights for policymakers and urban planners to promote RRWH as a practical solution for enhancing water resilience and sustainability in Asansol.</p>

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Rainwater Harvesting Potential in Asansol Municipal Corporation, the Second Largest City of West Bengal, India

  • 期刊论文

  • 发表日期：

    2025年11月3日

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  • Sarbeswar Haldar,
  • Arijit Majumder

摘要

Asansol Municipal Corporation (AMC) faces increasing challenges in water resource management due to population growth and environmental changes. Rooftop rainwater harvesting (RRWH) presents a viable solution to enhance urban water sustainability by addressing water scarcity, supporting groundwater recharge, and reducing dependence on conventional water sources. This study explores the feasibility of RRWH in AMC by analysing local meteorological data, including average rainfall and distribution patterns, and assessing the suitability of rooftops in residential, commercial, and institutional buildings. RRWH systems offer multiple benefits. They alleviate pressure on municipal water supplies by providing an alternative source for non-potable uses along with the contribution to groundwater recharge. Thirty years of rainfall data were analyzed using the Mann–Kendall test to assess rainfall patterns, while Google Earth Pro was employed to accurately measure roof areas. The research further examines the practical aspects of RRWH implementation, including system design, maintenance, and cost considerations. A cost-benefit analysis evaluates the economic viability by comparing initial investment costs with operational expenses. The estimated household rainwater harvesting capacity (115.34 m³) surpasses the annual non-potable household demand (97.2 m³), leaving a surplus of 18.14 m³ for groundwater recharge. A cost-benefit analysis recommends a gravity-fed rooftop rainwater harvesting system using plastic tanks and PVC pipes as a sustainable solution for AMC. By providing a detailed analysis of implementation and cost considerations, the research offers valuable insights for policymakers and urban planners to promote RRWH as a practical solution for enhancing water resilience and sustainability in Asansol.