<![CDATA[Rapid urbanization, population growth, and climate change have escalated the demand for water resources, significantly widening the gap between water supply and demand. Among various strategies for water resource management, rainwater harvesting emerges as a sustainable and efficient solution. This study evaluates the rooftop rainwater harvesting potential of Bharathiar University Campus, Coimbatore, utilizing its 96,839 m² rooftop area as the catchment. Water demand for entire university was calculated by combining the supply of water to the use of all buildings, research laboratories and gardening from university water supply unit. The total rooftop rainwater potential was calculated combining total catchment area (m2), amount of rainfall (mm) and runoff coefficient. The analysis revealed that the campus rooftops could annually harvest 4,90,28,274 liters of rainwater. This harvested water has the potential to meet approximately one-fourth of the campus’s total water demand (13,36,91,625 liters), providing a viable strategy to alleviate water scarcity while reducing dependency on external water sources and groundwater extraction.]]>
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