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Spatial distribution of soil heavy metal pollution estimated by different interpolation methods: Accuracy and uncertainty analysis
Xie Yunfeng; Chen Tong-bin; Lei Mei; Yang Jun; Guo Qing-jun; Song Bo; Zhou Xiao-yong
2011
发表期刊CHEMOSPHERE
卷号82期号:3页码:468-476
通讯作者Chen Tong-bin
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.
关键词Human Health Map Quality Hong-kong Contamination Urban Management Cadmium Lead
收录类别SCI
语种英语
项目资助者Chinese Academy of Sciences KZCX1-YW-06-03;Foundation of State Key Laboratory of Resources and Environmental Information System (LREIS) 08R8B000SA
文献类型期刊论文
条目标识符http://ir.igsnrr.ac.cn/handle/311030/2165
专题研究生部
通讯作者Chen Tong-bin
推荐引用方式
GB/T 7714
Xie Yunfeng,Chen Tong-bin,Lei Mei,et al. Spatial distribution of soil heavy metal pollution estimated by different interpolation methods: Accuracy and uncertainty analysis[J]. CHEMOSPHERE,2011,82(3):468-476.
APA Xie Yunfeng.,Chen Tong-bin.,Lei Mei.,Yang Jun.,Guo Qing-jun.,...&Zhou Xiao-yong.(2011).Spatial distribution of soil heavy metal pollution estimated by different interpolation methods: Accuracy and uncertainty analysis.CHEMOSPHERE,82(3),468-476.
MLA Xie Yunfeng,et al."Spatial distribution of soil heavy metal pollution estimated by different interpolation methods: Accuracy and uncertainty analysis".CHEMOSPHERE 82.3(2011):468-476.
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