Assessment in soil heavy metal pollution and safety pre-warning based on GIS

The growing problem of soil heavy metal pollution will not only harm human health, but also cause other environmental pollution. However, the soil pollution status is hard to be scientifically evaluated and effective safety warning due to the wide source of soil pollution and the uneven degree of pollution. Because of its powerful spatial analysis function, GIS can solve the problem of soil heavy metal evaluation and safety early warning and get more and more widely application. This paper summarizes the development of GIS technology both at home and abroad and discusses the application of the effective combination of GIS and geostatistical analysis methods in the evaluation and prediction of heavy metal pollution in soils. On the basis of the study on heavy metal pollution in urban soils of Ganzhou City, this paperprospects the pollution evaluation and early warning on safety development.