title: Geostatistical analysis and kriging of Hexachlorocyclohexane residues in topsoil from Tianjin, China.
abstract: A previously published data set of HCH isomer concentrations in topsoil samples from Tianjin, China, was subjected to geospatial analysis. Semivariograms were calculated and modeled using geostatistical techniques. Parameters of semivariogram models were analyzed and compared for four HCH isomers. Two-dimensional ordinary block kriging was applied to HCH isomers data set for mapping purposes. Dot maps and gray-scaled raster maps of HCH concentrations were presented based on kriging results. The appropriateness of the kriging procedure for mapping purposes was evaluated based on the kriging errors and kriging variances. It was found that ordinary block kriging can be applied to interpolate HCH concentrations in Tianjin topsoil with acceptable accuracy for mapping purposes.
authors.affiliation: College of Environmental Sciences, MOE Laboratory for Earth Surface Processes, Peking University, Beijing 100871, China.
authors.forename: B G
authors.initials: BG
authors.lastname: Li
authors.forename: J
authors.initials: J
authors.lastname: Cao
authors.forename: W X
authors.initials: WX
authors.lastname: Liu
authors.forename: W R
authors.initials: WR
authors.lastname: Shen
authors.forename: X J
authors.initials: XJ
authors.lastname: Wang
authors.forename: S
authors.initials: S
authors.lastname: Tao
mesh_terms: D002681:China; D003625:Data Collection / Q000379:methods; D003627:Data Interpretation, Statistical; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D001556:Hexachlorocyclohexane / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D010573:Pesticide Residues; D012989:Soil Pollutants; D001556:Hexachlorocyclohexane