多元统计分析对再生水河流水质特征分析

对以再生水为补给水源的通惠河进行水质监测，采用模糊综合评价的方法总体评价了通惠河的水质状况，综合评价结果表明，高碑店污水处理厂处理排放人河道的水质达到Ⅱ类水平，对通惠河的污染起到了一定的缓解作用。引入多元统计分析的方法：（1）空间聚类模型将通惠河水质类型分为两类，并具体分析了两种类型的水质18个参数的差别。分析发现第1类水体的主要污染物为硝态氮、亚硝态氮引起的氮污染、磷污染等工业污染，而第2类水体的污染主要以生活污水带来的有机污染为主。（2）运用因子分析解析通惠河的污染来源——主要来源于点源排放的污水产生的氨氮、硝态氮和有机污染。为保持再生水水质，需要对水质差的污染区设立重点监测点并控制偷排现象。

Analysis of characteristics of reclaimed river water based on multivariate statistic method

This study is centered on the water quality monitoring of Tonghui River, which is supplied by re- cycled water, and has adopted the Fuzzy Synthetic Evaluation （FSE） approach to assess the water quality of Ton- ghui River. The results of FSE show that the water emitted from Gaobeidian sewage treatment plant is relatively preferable to level lI ,which reduces the water-pollution level of Tonghui River. Moreover, two multivariate statis- tic techniques were employed ： （1） Hierarchical cluster analysis（HACA） classified the water into two groups of similar water quality characteristics, and analyzed the difference from one cluster to another in terms of 18 varia- bles. The analysis demonstrated that the main pollution of the first kind was phosphorus and nitrogen pollution caused by nitrate nitrogen, which belongs to industrial pollution; however, the pollution of the second type is mainly organic pollution engendered by domestic sewage. （2） Factor analysis （FA） was introduced to analyze the pollution sources. The main pollutants of the river come from the following ones： ammonia nitrogen, nitrate nitrogen, and organic pollutants which were discharged from the outlets. In order to protect the quality of re- claimed water, it is necessary to set up key monitoring stations in areas where there is poor water quality and ex- ercise strict control over the clandestina di~chnr~ of w~t~w~t~r ~;m,,lt 1,,