Analysis on Spatial Distribution Characteristics of Heavy Metal Pollution in Surface Soil of City

The contents of eight heavy metals,such as As,Cd,etc.,in surface soils of living quarters,industrial area,mountain area,trunk road area and public greenbelt were analyzed to find the pollution level of different areas by heavy metal.Using the waste load index method,the main factors that affected the soil heavy metal were checkout and the main charateristics of heavy metal pollution in different area were determined.Using the kriging interpolation method,the optimal unbiased estimation about heavy metal content was interpolated,and the spatial distribution of heavy metal pollution was analyzed,then the space distribution features of surface soil heavy metal were revealed.