基于改进方法的承德地表水环境质量评价

doi:10.13866/j.azr.2024.01.05

Abstract

Abstract:

To objectively reflect the surface water quality status, a combination of the Analytic Hierarchy Process Entropy Weight Method and the weighted average comprehensive evaluation principle were used to improve the fuzzy comprehensive evaluation method. The method was compared with the single factor evaluation, Nemero index, and traditional undefined extensive evaluation methods to evaluate the surface water environmental quality in the Chengde area in 2021. The results showed a significant spatiotemporal difference in the surface water quality. Except for some sections with poor water quality from July to September, the water quality in other sections was in Classes I-III; The main factors affecting surface water quality in the Chengde area were COD_Mn and TP; The single factor evaluation and the Nemero index methods could not reflect the overall water quality. Compared to the traditional fuzzy comprehensive evaluation method, the improved fuzzy comprehensive evaluation method considers the interaction between various pollution factors and weakened the impact of individual water quality indicators on the evaluation results. It can also rank the category of water quality, making it more suitable for evaluating the environmental quality of surface water in the Chengde area.

Key words: water quality evaluation, improved fuzzy comprehensive evaluation method, analytic hierarchy process, entropy weight method, Chengde area

ZHANG Sheng, ZHANG Tao, DUAN Wenyu, XU Li, Gu Jinyang, ZHANG Wei, LI Simin. Evaluation of the environmental quality of surface water in Chengde using improved methods[J].Arid Zone Research, 2024, 41(1): 50-59.

Figures/Tables 9

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内梅罗指数（P）	水质类别
P≤ 0.62	Ⅰ
0.62<P≤ 0.75	Ⅱ
0.75<P≤ 1	Ⅲ
1<P≤ 1.61	Ⅳ
1.61<P≤ 2.38	Ⅴ
P>2.38	劣Ⅴ

准则B_i	C₁	C₂	…	C_n
C₁	d₁₁	d₁₂	…	d₁_n
C₂	d₂₁	d₂₂	…	d₂_n
…	…	…	…	d₃_n
C_n	d_n₁	d_n₂	…	d_nn

Evaluation of the environmental quality of surface water in Chengde using improved methods

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