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基于因子分析对2012~2013年海河流域pH、DO、COD、BOD5、氨态氮和总石油烃等6项水质指标的监测数据进行统计,并对其中四项指标进行水污染综合指数评估,旨在对海河水质进行较为系统的评价。结果显示,BJ1和HB2两个站位水质属于Ⅳ类标准,其余各站位均为Ⅴ类;各站位综合评价结果得到海河流域指数为1.44,说明海河流域处于污染状态,其污染程度超过该流域功能区的标准。因子分析发现,COD、DO和NH3-N之间差异显著(P<0.05);主成分分析显示,除pH和BOD5外,其余指标都在0.70以上;COD、DO、NH3-N和TPH的贡献率较高,其中总石油烃的贡献率为100%,因此可以认为该海域的污染类型属于有机污染,且石油烃污染较为突出。
Based on the factor analysis, the monitoring data of six water quality indicators such as pH, DO, COD, BOD5, ammonia nitrogen and total petroleum hydrocarbons in the Haihe River Basin from 2012 to 2013 were statistically analyzed, and four of the indicators were evaluated for water pollution comprehensive index Haihe River water quality in a more systematic evaluation. The results showed that the water quality of two stations of BJ1 and HB2 belonged to the standard of type Ⅳ, and the remaining stations were all of type Ⅴ. The comprehensive evaluation result of each station showed that the index of Haihe River Basin was 1.44, indicating that the Haihe River Basin is polluted and its pollution level exceeds that Basin functional area standard. The result of factor analysis showed that the difference between COD, DO and NH3-N was significant (P <0.05). The principal component analysis showed that all the indexes except for pH and BOD5 were above 0.70. The contribution of COD, DO, NH3-N and TPH The rate of total petroleum hydrocarbon contribution is 100%. Therefore, it can be considered that the pollution types in the sea area are organic pollution and petroleum hydrocarbon pollution is more prominent.