Environmental baseline evaluation of lead in shallow groundwater based on statistical and spatial outlier identification
Tóm tắt
A series of methods have been applied for evaluating the environmental baseline—especially on a regional scale—because of its importance for local environmental management. However, most of the methods have been statistical in nature, and spatial variability has not been considered simultaneously. In this study, the combined use of statistical and spatial methods has been carried out to analyse lead concentrations in the shallow groundwater in the urban area of Suzhou, northern Anhui Province, China. The environmental baseline of lead in the shallow groundwater has been evaluated to be 3.836–8.240 μg/l after removal of either statistical or spatial outliers. The results are similar to those obtained by model-based objective methods, and further demonstrate that the combination method is more reasonable for environmental baseline evaluation.
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