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Impact of Installing Rainwater Harvesting System on Urban Water Management

Author

Listed:
  • Sara Lopes Souto

    (Federal University of Goiás)

  • Ricardo Prado Abreu Reis

    (Federal University of Goiás)

  • Marcus André Siqueira Campos

    (Federal University of Goiás)

Abstract

The urban-scale impacts of the use of Rainwater Harvesting Systems (RWHS) are little explored within the Brazilian urban and climatic reality. Thus, the objective of this work is to verify the impacts of these systems in reducing runoff and the demand for drinking water, through a case study carried out in a neighborhood in the city of Goiânia-GO. In order to carry out the study, the land use characteristics of the studied region were studied from satellite images, with three batch patterns being defined as study scenarios. The daily residential demand for non-drinking uses of water was calculated from the standard lots and the annual rainfall pattern in the city of Goiânia, which was also characterized by taking a 30-year historical series of daily rainfall data. With these data in hand, daily water balances were calculated using Excel, for commercial reservoirs of 1, 5 and 10 m3, in addition to reservoirs with ideal volumes obtained from the NETUNO software. Two balance models were tested and compared and, from them, analyzes were made of the potential for reducing the annual consumption of drinking water in the neighborhood and hydrological simulations were run to verify the flow damping, with the support of the SWMM program. In general, the RWHS use has positive aspects: it reduces the drinking water demand in the neighborhood (up to 37%). However, when analyzing the reduction of peak flows in the drainage system, it is only significant in scenarios with larger reservoirs, confirming its marginal role in stormwater management.

Suggested Citation

  • Sara Lopes Souto & Ricardo Prado Abreu Reis & Marcus André Siqueira Campos, 2023. "Impact of Installing Rainwater Harvesting System on Urban Water Management," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 37(2), pages 583-600, January.
    • Handle: RePEc:spr:waterr:v:37:y:2023:i:2:d:10.1007_s11269-022-03374-z
    DOI: 10.1007/s11269-022-03374-z
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    References listed on IDEAS

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    1. Jing, Xueer & Zhang, Shouhong & Zhang, Jianjun & Wang, Yujie & Wang, Yunqi, 2017. "Assessing efficiency and economic viability of rainwater harvesting systems for meeting non-potable water demands in four climatic zones of China," Resources, Conservation & Recycling, Elsevier, vol. 126(C), pages 74-85.
    2. Rostad, Nathan & Foti, Romano & Montalto, Franco A., 2016. "Harvesting rooftop runoff to flush toilets: Drawing conclusions from four major U.S. cities," Resources, Conservation & Recycling, Elsevier, vol. 108(C), pages 97-106.
    3. Xueer Jing & Shouhong Zhang & Jianjun Zhang & Yujie Wang & Yunqi Wang & Tongjia Yue, 2018. "Analysis and Modelling of Stormwater Volume Control Performance of Rainwater Harvesting Systems in Four Climatic Zones of China," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 32(8), pages 2649-2664, June.
    4. Sumar Farooq & Khalid Mahmood & Fiza Faizi, 2022. "Comparative Simulation of GIS-Based Rainwater Management Solutions," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 36(9), pages 3049-3065, July.
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    Cited by:

    1. Haowen Xie & Mark Randall & Sylvana Melo Santos, 2023. "Optimization of Roof Coverage and Tank Size for Integrated Green Roof Rainwater Harvesting Systems-a Case Study," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 37(12), pages 4663-4678, September.

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