【摘要】 为全面了解松辽河河流水体的污染状况,根据辽河的水质监测数据,采用主成分分析（PCA）对水质污染现状进行综合评价,并在主成分分析计算的相关结果之上进一步进行绝对主成分多元线性回归分析（APCS-MLR）,量化了每个主成分对各污染物的贡献率。结果表明:辽河水体的主要污染物包括高锰酸盐指数、COD_Cr、BOD₅、NH₃-N和石油类。丰水期第一主成分对NH₃-N、石油类的贡献率分别为49.09%和24.71%;平水期第一主成分对高锰酸盐指数、COD_Cr、BOD₅和NH₃-N的贡献率为30.48%、56.16%、26.93%和160.89%;枯水期第一主成分对高锰酸盐指数、COD_Cr、BOD₅、NH₃-N和石油类的贡献率分别为100.25%、101.26%、128.36%、93.71%和54.33%。辽河整体水质为Ⅳ类或Ⅴ类水质,在7个监测断面中,双台子河闸水质最差。研究表明,污染物主要受到沿岸城镇居民生活和石油化工企业废水的排放以及农业和畜牧业等面源污染的影响。更多还原

【Abstract】 In order to fully understand the water pollution status of Liao River, Principal component analysis（ PCA） is used to evaluate the status of water pollution according to the water quality monitoring data in 2015. Based on the correlation results of principal component analysis, the absolute principal component scores multiple linear regression analysis（APCS-MLR） is performed to quantify the source contribution rate of each pollution factor. The results showed that the main pollutants in Liao River were permanganate index, COD_Cr, BOD₅, NH₃-N and Petroleum. The contribution rates of the first principal component to NH₃-N and petroleum in the wet period is 49.09% and 24.71%. The contribution rates of the first principal component to permanganate index, COD_Cr, BOD₅ and NH₃-N during the flow period were 30.48%, 56.16%, 26.93% and 160.89%, respectively. The contribution rates of the first principal component to permanganate index, COD_Cr, BOD₅, NH₃-N and petroleum in the dry period were 100.25%, 101.26%, 128.36%, 93.71% and 54.33%, respectively. The overall water quality of the Liao River is class Ⅳ or Ⅴ. Among the seven monitoring sections, the water quality of Shuangtaizi is worst. The research indicates that pollutants are mainly affected by the discharge of wastewater from coastal towns and petrochemical enterprises and non-point source pollution such as agriculture and animal husbandry.更多还原