基于地统计学方法的城市灰尘重金属污染的空间变异特征

Spatial variation characteristics of urban dust heavy metal pollution based on geosatistics

运用ArcGIS的地统计学组件,分析了金华市城市地表灰尘中重金属Pb、Cr、Cu、Zn、Ni、Mn的空间分布特征.结果表明:上述重金属具有复合污染或一定的同源性特征,其中Pb、Cr、Cu、Mn可能主要受金华市城市产业布局和功能分区等结构性因素的影响,而Zn则受非结构性因素影响更大,来源比较复杂.Pb、Cr、Cu、Zn、Ni等重金属的空间分布比较相似.

Spatial variation characteristics of urban dust heavy metal including Pb, Cr, Cu, Zn, Ni and Mn in Jinhua were studied by the geostatistical component of ArcGIS （ a kind of geographic information system tool ）. The results showed that Pb, Cr, Cu, Zn, Ni and Mn had combined pollution or a certain homologous regions charateristics, among them Pb, Cr, Cu and Mn were influenced by structural factors of urban industry layout and function division, while Zn was influenced by non-structural factors and had complication sources. Spatial variation characteristics of Pb, Cr, Cu, Ni and Zn were seemed to be similar.