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Rainwater Harvesting or Not? A Cost-Benefit Analysis using Water-Energy Correlation and GIS-based Precipitation Simulation in Taipei, Taiwan

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Urban water supply systems consume energy for distribution. Saving potable water therefore implies saving energy. Using hillside communities of Taipei Metropolitan as a case study, this study proposed a GIS-based rainwater harvesting design system incorporating spatial technologies, hydraulic simulation and economic feasibility to explore how rainwater harvesting systems (RWHSs) can be a cost-effectively tool in urban water-energy conservation planning. The results clearly indicate that the economic feasibility of RWHSs was significantly enhanced when water and energy savings are both considered. Moreover, well-designed RWHSs can alleviate the water-energy shortage caused by rapid urbanization.
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Keywords: Economic feasibility analysis; Rainwater harvesting; Water-energy conservation

Document Type: Research Article

Publication date: 2009-01-01

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