基于改进内梅罗污染指数法和灰色聚类法的水质评价

Water quality evaluation based on improved Nemerow pollution index method and grey clustering method

选取2014年-2018年长江黄石段三峡断面和风波港断面的水质监测数据,运用传统内梅罗污染指数法、改进内梅罗污染指数法和灰色聚类法对两个断面的水环境质量进行评价,结果表明:传统内梅罗污染指数法和改进内梅罗污染指数法的评价结果均为Ⅲ类,但改进内梅罗污染指数法考虑了各评价因子的权重,较为全面地反映河流水质状况.灰色聚类法建立白化函数,根据最大隶属度原则判断河流水质类别,其评价结果优于传统、改进内梅罗污染指数法的评价结果.

The water quality monitoring data of the Three Gorges section and Fengbogang section of Huangshi section of the Yangtze River in 2014-2018 were selected. The water quality of the two sections was determined by the traditional Nemerow pollution index method, the improved Nemerow pollution index method and the grey clustering method. The evaluation results show that the evaluation results of the traditional Nemerow pollution index and the improved Nemerow pollution index methods are both Class III, but the improved one takes the weight of each evaluation factor into account and reflects the quality of the river water more comprehensively. The grey clustering method establishes the whitening function, and determines the river water quality category according to the principle of maximum membership degree. The evaluation result is better than those of the traditional and improved Nemerow pollution index methods.