基于因子分析定权的水质评价模型  

Evaluation model for water quality based on factor analysis

作　　者：李文生[1] 许士国[1] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116024

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第3期444-446,共3页Journal of Liaoning Technical University (Natural Science)

基　　金：国家重点基础研究计划"973"项目(2006CB403405)

摘　　要：在因子分析法的基础上,提出基于因子分析定权的水质评价模型。该模型由因子得分系数和方差贡献率确定指标权重,然后以指标权重与各水样相应指标的标准化值进行加权平均得到水质评价的综合指标值,进而对评价样本进行排序和分级。结合实例应用并通过与其它几种水质评价方法的比较,进一步验证了该模型的合理、简便和实用。A new evaluation model for water quality is presented and the coefficient of weight is calculated based on factor analysis. Through component score coefficient and percent of variance, the weight of evaluation indexes is gained. The comprehensive index of water quality evaluation can be obtained by the coefficient of weights and standardized values of evaluation indexes, and the samples of water quality can be classified and sorted. The calculation result for an example is compared with those by other evaluating methods of water quality and it indicates that the proposed model is reasonable, simple and practical.

关 键 词：权重 因子分析 水质评价 

分 类 号：X703[环境科学与工程—环境工程]