灰关联分析法在大沽河青岛段水质评价中的应用

利用大沽河干流青岛段6个水质监测控制断面2003～2007年的年均水质监测数据，采用灰关联分析法，通过各断面水质的多个水质评价因子与水质标准的距离综合分析，依据关联度计算结果全面系统的评价了大沽河干流青岛段水质总体状况与变化趋势，并结合单因子法评价结果，对采用灰关联分析法与单因子评价法两种评价方法进行分析比较和探讨，为科学合理评价总体水质状况提供重要技术参考。

Application of Gray Relational Analysis Method in Evaluation of Water Quality in Qingdao Part of Dagu River

On basis of average annual monitoring data from 2003 to 2007 of 6 monitoring sections in Qingdao part of main Dagu river, using gray relational analysis method, the distance between the 5 evaluation factors and the standard of water quality in each section was analyzed. According to the calculate results of relational degree, the overall condition and the variation trend of water quality in Qingdao part of Dagu river was evaluated comprehensively and systematically. And with the results by using single factor evaluation method, the two methods, gray relational analysis method and single factor evaluation method,were compared. This paper provided an important reference for evaluating the overall quality of water scientifically and reasonably.