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| DOI：10.13522/j.cnki.ggps.20180666 |
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| Comparative Analysis of Comprehensive Water Quality Identification Index Method Based on Different Weighting Method |
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CHENG Weiguo, LI Yabin, SU Yan, WANG Jian
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1.Shenyang Academy of Environmental Sciences, Shenyang 110167, China；2. Liaoning Provincial Key Laboratory for Urban Ecology, Shenyang 110167, China
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| Abstract: |
| 【Objective】In order to analyze the water quality distribution characteristics of each water quality monitoring section of Qingshui River in Ningxia, provide a basis for water quality assessment, based on three water quality section monitoring data on Qingshui River in Ningxia from 2014 to 2016.【Method】Using the method of Principal Component Analysis to select the evaluate data and choose representative water quality indicators to issue Comprehensive Water Quality Identification Index evaluation and combined with 3 weighting methods to do further comparative analysis. 【Result】The comprehensive water quality identification index show that the Ershilipu section water quality evaluation results for class II water and remained stable. The Sanying section evaluation results meet the class III water in 2014 and 2015 years, the evaluation results meet class IV water in 2016, It shows that the water quality of this section has a trend of decrease. The Quanyanshan section evaluation results for the class II water and reduced year by year, the water quality has become the trend of further good.【Conclusion】The evaluation results showed that the three section water quality evaluation using different weighting methods reached the water function zoning requirements, there are some defects in the Standard Multiple Method and the Entropy Weight Method, and the Variation Coefficient Method is more suitable than the other two weighting methods. |
| Key words: comprehensive water quality identification index; weight coefficient; principal component analysis;water quality assessment; Qingshui River |
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