物元分析法在巢湖西半湖水质评价中的应用

Application of Matter Element Analysis Method in Water Quality Evaluation of the Western Half of Lake Chaohu

选取溶解氧、高锰酸盐指数、化学耗氧量和氨氮作为评价指标,运用物元分析法和单因子指数法对巢湖西半湖2004~2014年水质进行了综合评价,结果表明：巢湖西半湖水质在2005、2010和2013年符合Ⅱ类水质标准,2004、2011和2014年符合Ⅲ类水质标准,水质处于良好状态;2006、2008、2009和2012年符合Ⅳ类水质标准,属于轻度污染;而2007年符合Ⅴ类水质标准,处于严重污染状态。物元法应用于湖泊水质评价是可行的,它利用关联函数对水质做出定量分析,可以把不相容问题转化为相容问题,水质评价结果客观。

The paper selected the DO, CODMn, CODcr and NH3 - N as the evaluation indexes, using the matter element analysis method and the single factor index method, evaluated the water quality of the west half of Chaohu lake from 2004 to 2014. The results showed that in the year of 2005, 2010 and 2013, the water quality meet the second class of the water quality standard. In the year of 2004, 2011 and 2014, the water quality meet the third class of the water quality standard, which means ＂safety critical＂. In the year of 2006, 2008, 2009 and 2012, the water quality meet the fourth class of the water quality stand- ard, which means slightly polluted. In the year of 2007, the water quality meet the fifth class of the water quality standard, which means heavily polluted. The application of matter element method in lake water quality evaluation is feasible, it uses the correlation function to make quantitative analysis on water quality. It can translate the incompatible problem into compatible problem, the water quality evaluation results is objective.