霍霄妮, 李 红, 张微微, 孙丹峰, 周连第, 李保国. 北京耕作土壤重金属多尺度空间结构[J]. 农业工程学报, 2009, 25(3): 223-229.
    引用本文: 霍霄妮, 李 红, 张微微, 孙丹峰, 周连第, 李保国. 北京耕作土壤重金属多尺度空间结构[J]. 农业工程学报, 2009, 25(3): 223-229.
    Huo Xiaoni, Li Hong, Zhang Weiwei, Sun Danfeng, Zhou Liandi, Li Baoguo. Multi-scale spatial structure of heavy metals in Beijing cultivated soils[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2009, 25(3): 223-229.
    Citation: Huo Xiaoni, Li Hong, Zhang Weiwei, Sun Danfeng, Zhou Liandi, Li Baoguo. Multi-scale spatial structure of heavy metals in Beijing cultivated soils[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2009, 25(3): 223-229.

    北京耕作土壤重金属多尺度空间结构

    Multi-scale spatial structure of heavy metals in Beijing cultivated soils

    • 摘要: 为了有效揭示土壤重金属的空间分布特征,为土壤环境质量评价提供科学依据,该研究以北京市耕作土壤中重金属为例,通过地统计学方法分析了重金属空间结构的尺度效应。研究结果表明:土壤重金属Cr、Ni、Zn和Hg的空间结构性对空间尺度有明显的依赖,理论半方差函数的最优性检验进一步表明多尺度套合模型能充分地挖掘和利用土壤重金属Cr、Ni、Zn和Hg的空间变异结构,并且采用多尺度套合模型法对重金属Cr、Ni、Zn和Hg进行克里格插值,其插值效果明显优于单一尺度下的普通克里格插值。因此,多尺度套合模型法能有效地揭示耕作土壤中重金属的空间分布特征。

       

      Abstract: In order to effectively reveal the spatial distribution characteristics of soil heavy metals and provide scientific basis for environmental quality assessment in Beijing cultivated soils, geo-statistics was used to explore the scale effect of spatial structure of heavy metals in Beijing cultivated soils. The results showed that spatial structure of Cr, Ni, Zn and Hg had distinct dependence on spatial scale. According to the optimality test of theoretical semi-variance function, the spatial structure of Cr, Ni, Zn and Hg could be described fully by multi-scale nested model. In addition, the spatial interpolation accuracy of Cr, Ni, Zn and Hg using the multi-scale nested model was higher than that using the ordinary Kriging at a single scale. Therefore, the multi-scale nested model can estimate the spatial distribution characteristics of soil heavy metals more effectively than the ordinary Kriging method.

       

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