基于主成分分析的博斯腾湖水污染动态评价

Dynamic evaluation of water pollution in Bosten Lake based on principle component analysis

运用主成分分析法和系统聚类法对新疆博斯腾湖近10 a的水污染状况进行综合评价和对比分析。分析结果指出:2000—2009年期间,2000年的水污染综合评价得分最高,说明该年水污染程度是10a中最为严重的。得到结论如下:近10a的博斯腾湖水污染的综合评价得分呈下降趋势,说明水污染程度有所降低,但从聚类分析结果发现其改善幅度并不大,甚至从2005年起,水污染综合得分有趋于上升的趋势,说明目前博斯腾湖水污染问题依然严峻,水质型污染突出,其污染发展趋势仍不容乐观。

The water pollution in Bosten Lake in Xinjiang over the last ten years was evaluated and analyzed using the principal component analysis and the system clustering method.Analysis shows that,during the period from 2000 to 2009,the score of comprehensive evaluation of water pollution in 2000 was the highest,indicating that the most serious water pollution over the last ten years occurred in this year.The score of comprehensive evaluation of water pollution in Bosten Lake over the last ten years has a declining trend,indicating a water pollution alleviation in the lake.Clustering analysis shows that the water pollution in the lake has not been alleviated,and the score of comprehensive evaluation of water pollution even had an increasing trend in 2005,which indicates that the water pollution in Bosten Lake was still serious and the water quality was unsatisfactory.