基于主成分分析法对乌鲁木齐河水质的综合评价

Comprehensive Evaluation of Water Quality of Urumqi River Based on Principal Component Analysis

以乌鲁木齐河具有代表性的4个监测断面为例,选取2006年7个指标监测数据(pH值、溶解氧、高锰酸钾指数、五日生化需氧量、氨氮、石油类、挥发酚)。运用主成分分析方法、结合统计软件MATLAB7.0进行分析计算、以乌鲁木齐2006水质监测数据综合评价乌鲁木齐河,结果表明,基于各断面主成分得分排序,高家户桥得分最高是污染最严重的断面,且高锰酸钾指数、五日生化需氧量、石油类是主要污染指标。综合评价可以精确乌鲁木齐河污染指标,划分严重污染区域,为治理乌鲁木齐水环境提供理论依据。

In this paper,according to the representative four monitoring sections of Urumqi River,seven indicators of the 2006 monitoring data,such as PH,DO,CODMn,BOD5,NH3-N,Petroleum,Volatile,are selected and the principal component analysis method combined with the analysis and calculation by statistical software Matlab 7.0 is used to conduct the comprehensive evaluation of the Urumqi River.The results show that based on the principal component scores of the sorting section,the Gao household bridge section,which has the highest score,is the most polluted section and the major pollution indictors are CODMn,BOD5 and Petroleum.The comprehensive evaluation result can determine the major pollution indicators of the Urumqi River pollution and provide the theory basis for dividing the polluted area and the water environment management.