基于模糊综合评价法与单因子指数评价法的水质评价

通过2012年5月至10月对凡河榛子岭水库上游河段的水质监测,采用模糊综合评价法对凡河榛子岭水库上游河段水体的水质状况进行了综合评价,同时与单因子指数评价法评价结果进行对比分析。结果表明,2种评价方法的评价结果存在较大差异,采用模糊综合评价法评价得到的水质评价结果相对较好;采用模糊综合评价法评价,仅6月的杨坟沟、岱海寨断面及9月的杨坟沟断面的水质为Ⅴ类,其他月份各监测断面的水质均符合Ⅲ类水质标准要求;而采用单因子指数评价法的评价结果仅9月份的杨坟沟断面的水质达到Ⅱ类水质,其余各月三个断面监测的水质均超出Ⅴ类水质标准。在水质评价中,应根据评价目的合理选择水质评价方法,使水质评价结果更为准确。

Application of Fuzzy Mathematics and Single Factor Index in Water Quality Evaluation

Fuzzy comprehensive evaluation method and single factor index evaluation were used to evaluate water quality of Zhenziling reservoir upstream section of Fan River, based on water quality monitoring data from May to October in 2012. The results showed that the evaluation results were large difference between two kinds of evaluation methods, and the water quality was better with fuzzy comprehensive evaluation method. With fuzzy comprehensive evaluation method, the water quality of Yangfengou sections reached V grade in June and September, which was the same as Daihaizhai section in June, and the rest of sections fulfilled the requirement. But the water quality of each sections were more than V grade except Yangfengou section in September, whichwere used single factor index evaluation method. In order to make the evaluation results more accurate, it should be based on evaluation purposes to choose right evaluation in practical application.