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Evaluation of ecologically clean small watersheds in the Yangtze river estuary area of China

Author

Listed:
  • Yiqing Sun

    (Hohai University
    Hohai University)

  • Zhenzhong Shen

    (Hohai University
    Hohai University)

  • Weihua Fang

    (Nanjing Automation Institute of Water Conservancy and Hydrology)

  • Jiaao Yu

    (Hohai University
    Hohai University)

  • Lei Gan

    (Hohai University)

  • Liqun Xu

    (Hohai University)

  • Runying Wang

    (Hohai University)

  • Hongwei Zhang

    (Hohai University
    Hohai University)

  • Ruiwen Liu

    (Hohai University)

  • Congcong Zhou

    (Hohai University
    Hohai University)

  • Zhangxin Huang

    (Hohai University
    Hohai University)

Abstract

Ecologically clean small watersheds are crucial for water and soil conservation in China and provide a basis for the comprehensive development and sustainable utilization of water resources. In this study, a model and evaluation system for ecologically clean small watersheds based on the AHP-fuzzy comprehensive evaluation method were proposed to evaluate the construction of such watersheds in the Yangtze river estuary area of China, using Changning district in Shanghai as a case study. The evaluation system includes four attribute layer indicators: water quality, soil and soil erosion, pollution, and water system, as well as 13 index layer indicators. The watersheds are evaluated as “excellent,” “good,” “medium,” or “poor.” The evaluation is carried out by assigning weights to the indicators, establishing the membership degree matrix, determining the fuzzy synthesis operator, and calculating the score of the comprehensive evaluation. The evaluation results were analyzed and discussed. The results show that the comprehensive evaluation score of ecologically clean small watershed construction in Changning district was found to be 83.28. Pollution control received an “excellent”-level score of 86.21, while water system management received a “poor”-level score of 57.49. Overall, the construction of ecologically clean small watersheds was evaluated as “good,” although some aspects still need improvement. The results of this study provide a basis for evaluating the construction of ecologically clean small watersheds in the Yangtze river estuary area.

Suggested Citation

  • Yiqing Sun & Zhenzhong Shen & Weihua Fang & Jiaao Yu & Lei Gan & Liqun Xu & Runying Wang & Hongwei Zhang & Ruiwen Liu & Congcong Zhou & Zhangxin Huang, 2024. "Evaluation of ecologically clean small watersheds in the Yangtze river estuary area of China," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 26(10), pages 26147-26170, October.
    • Handle: RePEc:spr:endesu:v:26:y:2024:i:10:d:10.1007_s10668-023-03720-0
    DOI: 10.1007/s10668-023-03720-0
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    References listed on IDEAS

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