灰关联分析法在黄家湖水质评价的应用

Application of Grey Correlation Analysis in Water Quality Evaluation

灰色关联分析法即对于两个系统之间的因素,随时间或不同对象而变化的关联性大小的量度。在系统发展过程中,若两个因素变化的趋势具有一致性,即同步变化程度较高,可谓二者关联程度较高;反之,则较低。文章选取DO、BOD5、氨氮、总磷、高锰酸盐指数5项因子作为监测指标,采用灰关联分析法对武汉市黄家湖地表水进行综合评价,并且与单因子评价法进行比对,两种评价方法评价的结果基本一致。灰关联分析法全面客观地对水质整体进行了评价,克服了单因子评价法对水质总体评价的局限性,较好地解决了评价标准中分级不科学对评价结果的影响。

d The gray correlation analysis measures the factors between two systems, as well as the relevance of the two systems which changing over time or a different object. If changing trends of the two factors are consistent in development process, then it will have a higher degree of relevance, vice versa. This paper chooses dissolved oxygen, BOD5 , ammonia nitrogen, total phosphorus, CODMa five indicators as monitoring and evaluation indicators. The surface water from Huangjia Lake in Wuhan City was taken as the sample. The analysis shows that water pollution is very serious and has eutrophication phenomenon. The grey correlation analysis was compared with the single factor evaluation, and the evaluation results are almost the same.