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<p>The existing methods for evaluating the water environment often have limitations that render them unsuitable for assessing the water environment in ecologically fragile plateau areas. The plateau ecological fragile area is more stringent for the management of water pollution, and the existing evaluation system cannot be determined which is more suitable for use under the condition of plateau fragile ecological area. After excluding most of evaluation methods, three evaluation methods were selected to compared: Comprehensive index method evaluation system, Entropy weight-extension matter element method evaluation system, and Grey-weighted correlation method evaluation system. The findings are as follows: The comprehensive index method has the drawback that it uses the worst classification of pollution factor as the overall water quality classification, which may lead to an inadequate assessment of water quality. The grey-weighted correlation method is a commonly used method. However, after analyzing the discrete degree of the weights of pollution sources and comprehensive correlation, the above two methods are verified to have a high discrete degree, which is not suitable for plateau ecological fragile area with high requirements for the accuracy of water quality categories. The entropy weight-extension matter-element method can accurately calculate results while considering interactions between various pollution indices. What 's more, the entropy weight-extension matter-element method has a lower degree of dispersion, which can indicate that it is more reasonable. In summary, based on considerations regarding accuracy classification, the optimal approach should be considered as entropy weight-extension matter-element.</p>

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Comparison and Assessment of Surface Water Environment Evaluation System in Plateau Ecological Fragile Area

  • 期刊论文

  • 发表日期：

    2025年7月3日

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  • Zhimin Chen,
  • Mingyang Yi,
  • Meng Zhang,
  • Weifei Zhao,
  • Junhui Liu,
  • Qianlong Yuan,
  • Dianqiang Wang,
  • Hui Long,
  • Haoyong Zhang,
  • Pengji Zheng,
  • Hongyan Shang,
  • Shengyi Xie,
  • Waqar Yunas

摘要

The existing methods for evaluating the water environment often have limitations that render them unsuitable for assessing the water environment in ecologically fragile plateau areas. The plateau ecological fragile area is more stringent for the management of water pollution, and the existing evaluation system cannot be determined which is more suitable for use under the condition of plateau fragile ecological area. After excluding most of evaluation methods, three evaluation methods were selected to compared: Comprehensive index method evaluation system, Entropy weight-extension matter element method evaluation system, and Grey-weighted correlation method evaluation system. The findings are as follows: The comprehensive index method has the drawback that it uses the worst classification of pollution factor as the overall water quality classification, which may lead to an inadequate assessment of water quality. The grey-weighted correlation method is a commonly used method. However, after analyzing the discrete degree of the weights of pollution sources and comprehensive correlation, the above two methods are verified to have a high discrete degree, which is not suitable for plateau ecological fragile area with high requirements for the accuracy of water quality categories. The entropy weight-extension matter-element method can accurately calculate results while considering interactions between various pollution indices. What 's more, the entropy weight-extension matter-element method has a lower degree of dispersion, which can indicate that it is more reasonable. In summary, based on considerations regarding accuracy classification, the optimal approach should be considered as entropy weight-extension matter-element.