宽域灰色聚类法在土壤环境质量评价中的应用

利用宽域灰色聚类法评价土壤环境质量，先构造白化函数，引入修正系数，确定污染物权重，再计算聚类系数实现土壤样本的环境质量等级评判与排序。将此方法应用于太原市5个区县，8项指标的土壤质量评价，并与综合指数法、模糊综合评判法相比较，结果表明模糊综合评判法与宽域灰色聚类法对于5个区县的污染级别的评价结果是一致的，而综合指数法对前四个评价点级别均比上述两种方法低一个级别，三种方法的质量排序大致相同，只有模糊综合评价中认为小店区优于万柏林区。

Application of Range Grey Clustering Method on the Soil Quality Assessment

The range grey clustering method is used to evaluate soil quality. Firstly, white function is built up with correction coefficient to deter the weight of the pollutants, then the clustering coefficient is calculated to realize the level assessment of the soil samples. The method is applied in five counties with 8 indexes to evaluate the soil quality, which is compared with comprehensive index method and fuzzy comprehensive evaluation method. The results show that the assessment conclusions from range grey clustering method and fuzzy comprehensive evaluation method are high consistency, however, the results from comprehensive index method is lower one grade than the above two methods, and the sorting from the three methods is similar, only Xiaodian area is priory to Wanbolin area through the fuzzy comprehensive evaluation method.