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Precondition Study of a Sponge City: Comprehensive Assessment of the Vulnerability of an Urban Rainwater System

Author

Listed:
  • Lei Li

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

  • Cuimei Li

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

  • Hao Wang

    (China Institute of Water Resources and Hydropower Research, Beijing 100038, China)

  • Fei Xu

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

Abstract

This study introduces the concept of urban rainwater system vulnerability and identifies the indicator factors that affect the vulnerability of rainwater systems. Using the analytic hierarchy process (AHP), an index system for the vulnerability assessment of the rainwater system was established, and a vulnerability assessment model for the rainwater system was constructed. By integrating vulnerability degree, recurrence period, and water depth of ponding, a vulnerability assessment framework for urban rainwater systems was developed. Taking a newly developed urban area in the Suzhou High-Tech Zone as an example, we calculated the vulnerability degree of the urban rainwater system in this area to be 0.6497, indicating a high level of vulnerability and poor system safety. When encountering rainfall with a recurrence period p > 5 years, the city is likely to experience severe waterlogging. Through the analysis and evaluation of the rainwater system’s vulnerability, while clarifying the current state of the rainwater system, it can provide a scientific reference basis for the system’s upgrade, transformation, and optimized operation and management. Although the selection of factors may not be entirely comprehensive, this method allows for adjustments based on the composition and operation of different rainwater systems.

Suggested Citation

  • Lei Li & Cuimei Li & Hao Wang & Fei Xu, 2024. "Precondition Study of a Sponge City: Comprehensive Assessment of the Vulnerability of an Urban Rainwater System," Sustainability, MDPI, vol. 16(10), pages 1-16, May.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:10:p:3897-:d:1389591
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