Evaluation of Water Quality in the Fuzhou River Basin Based on Water Quality Identification Index and Principal Component Analysis Method
For the main stream within the Fuzhou River Basin,Caifangshen Bridge,Dongfeng Reservoir outlet,Xiangjiao dam,Fuzhou Bay Bridge,Xingshuyuan,Shatuo Bridge,and Santaizi and the tributaries of Jiudao River,Langu River,Zhenz-hu River,Taiyang River,Huitou River,and Dapangtun,thirteen key monitoring points were set up for sampling and monito-ring.Four indicators,CODCr,CODMn,NH3-N and TP,were selected for water quality identification index evaluation,and 11 indicators,including CODMn,TP,NH3-N,TN,Cl-,SO42-,NO3-N,NO2-N,Mg2+,K+,Na+were selected for principal component analysis evaluation.The research results show that the water quality at the outlet of Dongfeng Reservoir and Santaizi section is the best,while the water quality at the upstream section of Huitou River,Dapangtun section,and Zhenzhu River section is the worst.The biggest contributors to water quality are organic matter and nitrogen phosphorus pollution.The evalu-ation results of principal component analysis and water quality identification index method are relatively objective and reliable,and the two evaluation methods can complement each other to comprehensively evaluate the water quality situation.
water quality identification indexprincipal component analysis methodFuzhou river basinevaluation of water quality
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