Application of factor analysis in evaluation of water quality

Factor analysis is a kind of way to reduce orginal dimension and to make multiple variables into a few comprehensive index. Because thre are many factors influencing water quality, it is a complex process in evaluating water quality. In view of the defect of traditional water quality evaluation model, factor analysis method is developed to evaluate surface water quality in Baoying country. By SPSS software, factor analysis model is applied to evaluate water quality at representative sections in Baoying surface area. By the combination of variables index, adjusting the combinatorial coefficient to make the new variables representative independent. The process is introduced in the paper in detail.The results indicate that principal component model is suitable for water quality evaluation. By analysis, it is important to pay attention to bring into effective measures for pollution control.