Comparison of the common spatial interpolation methods used to analyze potentially toxic elements surrounding mining regions

doi:10.1016/j.jenvman.2018.01.074

	Comparison of the common spatial interpolation methods used to analyze potentially toxic elements surrounding mining regions
	Ding, Qian 1,2; Wang, Yong 1; Zhuang, Dafang 1
刊名	JOURNAL OF ENVIRONMENTAL MANAGEMENT
	2018-04-15
卷号	212 页码:23-31
关键词	Potentially Toxic Element Inverse distance weighting interpolation Radial basis function interpolation Ordinary kriging interpolation Uncertainty Mining area
ISSN号	0301-4797
DOI	10.1016/j.jenvman.2018.01.074
通讯作者	Wang, Yong(wangy@igsnrr.ac.cn)
英文摘要	The appropriate spatial interpolation methods must be selected to analyze the spatial distributions of Potentially Toxic Elements (PTEs), which is a precondition for evaluating PTE pollution. The accuracy and effect of different spatial interpolation methods, which include inverse distance weighting interpolation (IDW) (power = 1, 2, 3), radial basis function interpolation (RBF) (basis function: thin-plate spline (TPS), spline with tension (ST), completely regularized spline (CRS), multiquadric (MQ) and inverse multi-quadric (IMQ)) and ordinary kriging interpolation (OK) (semivariogram model: spherical, exponential, gaussian and linear), were compared using 166 unevenly distributed soil PTE samples (As, Pb, Cu and Zn) in the Suxian District, Chenzhou City, Hunan Province as the study subject. The reasons for the accuracy differences of the interpolation methods and the uncertainties of the interpolation results are discussed, then several suggestions for improving the interpolation accuracy are proposed, and the direction of pollution control is determined. The results of this study are as follows: (i) RBF-ST and OK (exponential) are the optimal interpolation methods for As and Cu, and the optimal interpolation method for Pb and Zn is RBF-IMQ (ii) The interpolation uncertainty is positively correlated with the PTE concentration, and higher uncertainties are primarily distributed around mines, which is related to the strong spatial variability of PTE concentrations caused by human interference. (iii) The interpolation accuracy can be improved by increasing the sample size around the mines, introducing auxiliary variables in the case of incomplete sampling and adopting the partition prediction method. (iv) It is necessary to strengthen the prevention and control of As and Pb pollution, particularly in the central and northern areas. The results of this study can provide an effective reference for the optimization of interpolation methods and parameters for unevenly distributed soil PTE data in mining areas. (C) 2018 Elsevier Ltd. All rights reserved.
资助项目	Common technology of high-resolution earth observation system major, project application[30-Y20A07-9003-17/18] ; Research on Fusion Assimilation and System Integration of Satellite - Air - Ground Multi - source Carbon Emission Monitoring Data[088RA90BYA] ; Research on Technical Specification of High - score Information Metadata[30-Y20A01-9003-16/17]
WOS关键词	YANGTZE-RIVER ESTUARY ; HEAVY-METALS ; RISK-ASSESSMENT ; SOUTH CHINA ; SOILS ; SEDIMENTS ; GEOCHEMISTRY ; CADMIUM ; ZINC ; LEAD
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
WOS记录号	WOS:000428097500004
资助机构	Common technology of high-resolution earth observation system major, project application ; Research on Fusion Assimilation and System Integration of Satellite - Air - Ground Multi - source Carbon Emission Monitoring Data ; Research on Technical Specification of High - score Information Metadata
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/57266]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Yong
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ding, Qian,Wang, Yong,Zhuang, Dafang. Comparison of the common spatial interpolation methods used to analyze potentially toxic elements surrounding mining regions[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2018,212:23-31.
APA	Ding, Qian,Wang, Yong,&Zhuang, Dafang.(2018).Comparison of the common spatial interpolation methods used to analyze potentially toxic elements surrounding mining regions.JOURNAL OF ENVIRONMENTAL MANAGEMENT,212,23-31.
MLA	Ding, Qian,et al."Comparison of the common spatial interpolation methods used to analyze potentially toxic elements surrounding mining regions".JOURNAL OF ENVIRONMENTAL MANAGEMENT 212(2018):23-31.