基于主成分分析法沱江干流水质评价研究

Assessment of Water Quality of the Main Stream of Tuojiang River based on Principal Component Analysis Method

利用SPSS软件,采用主成分分析法对沱江干流水环境质量进行了综合评价,对沱江干流14个监测断面的化学需氧量、五日生化需氧量和氨氮等8个水质指标进行分析计算。结果表明:基于各断面主成分得分的顺序,三皇庙得分最高,水质相对较差;幸福村得分最低,水质相对较好;14个断面水质类别均未超过Ⅲ类。采用主成分分析法对水质进行综合评价可为治理水环境提供理论依据。

The water environmental quality of the main stream of Tuojiang River was comprehensively evaluated by Principal Component Analysis method using SPSS software.Eight water quality indexes,such as COD,BOD5,NH3-N and so on were analyzed in fourteen monitoring sections along the Tuojiang River.The results showed that based on the order of principal component scores of each section,the Sanhuangmiao section had highest score and the water quality was relatively poor,the Xingfuchun section had lowest score and the water quality was relatively good.The water quality of 14 sections did not exceed classⅢ.The evaluation method could provide theoretical basis for water environment management.