基于熵权的有机污染综合评价法在水质评价中的应用

Application of Entropy-based Organic Pollution Index in Assessment of Water Quality

针对有机污染综合评价法对水质评价指标采用等权重的处理方式存在的不足,基于温州市温瑞塘河16个监测站点的氨氮、溶解氧、五日生化需氧量、化学需氧量等能反映有机污染指标的监测数据,通过熵权法对每个指标赋予一定的权重,提出了基于熵权的有机污染综合评价法,计算了温瑞塘河的有机污染综合评价值,并与传统的有机污染综合评价法的计算结果进行了比较。结果表明,采用熵权法与有机污染综合评价法相结合,克服了有机污染等权重处理评价指标因子的缺陷,其与有机污染综合评价法所反映的污染特点具有一致性,评价结果能较好地反映流域水质有机污染的状况。

In view of the shortages existing in organic pollution comprehensive evaluation melhod which water quality indicators are treated at the means of equal weight, each water quality index of BOD3, DO, CODer, NH3-N are given certain weight by entropy weight method in 16 sites of Wenruitang River. The organic pollution comprehensive evaluation method is put forward based on entropy weight. And the organic pollution comprehensive index in Wenruitang River is calculated. Compared with the traditional organic pollution comprehensive index, the results show that the proposed method overcomes the shortcomings of the weight of organic pollution in equal treatment evaluation factors. The pollution characteristics of the method is consistent with other methods. The results of assessment can reflect the organic pollution of water quality well.