Application of factor analysis based on entropy weight verification in water quality
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Abstract:
Factor analysis method can convert a number of water quality indexes to a few comprehensive indexes and eliminate the correlation between indexes, so it can provide more objective water quality evaluation results. The factor analysis method was used to conduct the comprehensive evaluation of water quality in the Liao River Basin from 2006 to 2012. The results showed that the main impact factors of water quality are DO, COD, permanganate value, BOD, volatile phenol, fluoride, petrole 2 um, followed by PH and ammonia nitrogen. On the basis, the variation trend of water quality in the Liao River Basin from 2006 to 2012 was obtained, which suggested that water quality has improved gradually from 2006 to 2011, while becomes bad in 2012, but the trend of variation range is small without impacts on the general trend. Finally, the entropy weight method was used to validate the evaluation results from the factor analysis, which indicated both assessment results are similar.
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