Spatial distribution of soil heavy metal pollution estimated by different interpolation methods: Accuracy and uncertainty analysis
文献类型：SCI/SSCI论文
| 作者 | Yang J.; Lei M. |
| 发表日期 | 2011 |
| 关键词 | Soil contamination Spatial interpolation Uncertainty evaluation Geostatistics Inverse distance weighting Radial basis functions human health map quality hong-kong contamination urban management cadmium lead |
| 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. |
| 出处 | Chemosphere |
| 卷 | 82 |
| 期 | 3 |
| 页 | 468-476 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0045-6535 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/22732]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Yang J.,Lei M.. Spatial distribution of soil heavy metal pollution estimated by different interpolation methods: Accuracy and uncertainty analysis. 2011. |
入库方式： OAI收割
来源：地理科学与资源研究所
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