应用改进后的欧氏聚类法对延安市区饮用水源的水质污染分析

Water pollution analysis of drinking water source in urban district of Yan'an with method of improved Euclidean cluster

根据延安市区饮用水源王瑶水库连续四年的水质监测数据,运用欧氏聚类法对分别代表进水区、出水区和库心区等不同水域6个监测点的水质进行评价.结果表明,水库的进水水质受到Cr(Ⅵ)、石油类等物质的污染,出口水质较好.欧氏距离聚类法精确地计算不同指标的权重,并引入相对距离计算各个指标对标准值的差异,克服传统的指数评价法的弊端,使评价结果更为准确.

According to the data of water quality of Wangyao reservoir monitored continuously for 4 years, the water quality of 6 monitoring points at the inlet, outlet and center of reservoir was evaluated by means of improved Euclidean cluster. The results showed that the inlet water was polluted by Cr^6＋ and petrolic oil but the outlet water was better. The weight could be accurately calculated for different indexes by Euclidean cluster and a concept of relative distance was introduced in order to calculate the differences between the indexes and their standard values. The defects of traditional exponential evaluation method were overcome so that the results were made more accurate.