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Multi-objective Optimization of Urban Water Allocation Considering Recycled Water

Author

Listed:
  • Siwei Chen

    (Zhejiang University)

  • Yue-Ping Xu

    (Zhejiang University)

  • Yuxue Guo

    (Zhejiang University)

  • Xinting Yu

    (Zhejiang University)

Abstract

Recycled water is a vital solution to urban water scarcity and a key element in sustainable water management. This study develops a multi-objective optimal allocation model that integrates conventional and recycled water. By incorporating carbon emissions into the water allocation process, the model provides a comprehensive approach to balancing social, economic and environmental goals. Advanced methodologies, including direct policy search, nonlinear approximation networks, and multi-objective evolutionary algorithms, are employed to design Pareto-optimal operating policies for joint water allocation. Additionally, the AHP-Entropy method is applied as a multi-attribute decision-making (MADM) framework to systematically evaluate and rank allocation strategies based on ecological, economic, and social objectives. The model is demonstrated in Yiwu City, China, a region characterized by severe water shortages due to rapid industrial development. Results show that incorporating recycled water reduces water shortages by 31.67%, increases economic benefits by 8.45%, and minimally raises carbon emissions by 1.78%. These findings highlight the dual role of recycled water in alleviating urban water scarcity and mitigating carbon emissions, underscoring its value as a sustainable alternative in water resource management. By integrating advanced optimization techniques with robust decision-making tools, this study provides a scientific basis for developing low-carbon water allocation strategies and offers critical insights for policymakers seeking to enhance water security and sustainability in rapidly urbanizing regions.

Suggested Citation

  • Siwei Chen & Yue-Ping Xu & Yuxue Guo & Xinting Yu, 2025. "Multi-objective Optimization of Urban Water Allocation Considering Recycled Water," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 39(6), pages 2615-2631, April.
    • Handle: RePEc:spr:waterr:v:39:y:2025:i:6:d:10.1007_s11269-024-04081-7
    DOI: 10.1007/s11269-024-04081-7
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    References listed on IDEAS

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    1. Snigdha Sarita Mohapatra & Meenakshi Arora & Wenyan Wu & Manoj Kumar Tiwari, 2025. "A Review of IUWM Approach to Address Urban Water Challenges Faced by a Developing Country," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 39(6), pages 2443-2461, April.

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