模糊综合评价法及主成分分析法在额尔齐斯河水质评价中的应用

利用额尔齐斯河2010年监测数据进行水质评价。用模糊综合评级法对水质状况进行评价，判断水质级别；用主成分分析法判断主要污染物类型，确定各污染物的主要贡献率。并将两种方法的评价结果与单项指标评价结果相比较，结果表明：在水质评价中水质级别判断采用模糊综合评价法，水质主要污染物判断采用主成分分析法，用两种评价方法结合起来对水环境质量进行评价，结果较准确。

Application of Fuzzy Mathematics Evaluation and Principal Component Analysison Water Quality Assessment ofIrysh River

The water quality of Irysh River was assessed based on the water monitoring data in 2010.Fuzzy mathematics evaluation could be applied to determine the grade of the water quality of the river.Principal component analysis was adopted to uncover the major pollutants and their contribution rates.The results of these two methods were compared with the result using single index evaluation method.It was indicated that these two methods had different focuses for different purposes of determining the water grades or uncovering the major pollutants.As a result,a combination of these two methods could produce a relatively accurate water evaluation result.