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题名: Spatial distribution of soil heavy metal pollution estimated by different interpolation methods: Accuracy and uncertainty analysis
作者: Xie Yunfeng ; Chen Tong-bin ; Lei Mei ; Yang Jun ; Guo Qing-jun ; Song Bo ; Zhou Xiao-yong
刊名: CHEMOSPHERE
出版日期: 2011
卷号: 82, 期号:3, 页码:468-476
关键词: HUMAN HEALTH ; MAP QUALITY ; HONG-KONG ; CONTAMINATION ; URBAN ; MANAGEMENT ; CADMIUM ; LEAD
通讯作者: Chen Tong-bin
英文摘要: Mapping the spatial distribution of contaminants in soils is the basis of pollution evaluation and risk control. Interpolation methods are extensively applied in the mapping processes to estimate the heavy metal concentrations at unsampled sites. The performances of interpolation methods (inverse distance weighting, local polynomial, ordinary kriging and radial basis functions) were assessed and compared using the root mean square error for cross validation. The results indicated that all interpolation methods provided a high prediction accuracy of the mean concentration of soil heavy metals. However, the classic method based on percentages of polluted samples, gave a pollution area 23.54-41.92% larger than that estimated by interpolation methods. The difference in contaminated area estimation among the four methods reached 6.14%. According to the interpolation results, the spatial uncertainty of polluted areas was mainly located in three types of region: (a) the local maxima concentration region surrounded by low concentration (clean) sites, (b) the local minima concentration region surrounded with highly polluted samples; and (c) the boundaries of the contaminated areas. (C) 2010 Elsevier Ltd. All rights reserved.
收录类别: SCI
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.igsnrr.ac.cn/handle/311030/2165
Appears in Collections:研究生部_期刊论文

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Xie Yunfeng,Chen Tong-bin,Lei Mei,Yang Jun,Guo Qing-jun,Song Bo,Zhou Xiao-yong.Spatial distribution of soil heavy metal pollution estimated by different interpolation methods: Accuracy and uncertainty analysis.CHEMOSPHERE,2011,82(3):468-476
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