荔城平原区耕地土壤重金属含量插值模型研究

采用统计学、地统计学以及GIS相结合,研究莆田市荔城区兴化平原耕地土壤中8种重金属(As、Hg、Cr、Cd、Pb、Ni、Cu和Zn)不同插值方法的精度比较,结果表明:As、Hg、Cr含量的最佳空间插值模型均为普通克立格,Cd、Pb、Ni、Cu和Zn含量的最佳空间插值模型分别为简单克立格、1次局部多项式、完全规则样条函数、2次局部多项式和2次全局多项式,为兴化平原区耕地土壤重金属合理采样以及重金属污染防治、耕地环境保护等提供科学依据。

Study on Spatial Interpolation Model of Heavy Metals in Licehng Cultivated Land

We explored the precision of different interpolation methods of eight heavy metals in Licehng cultivated land of Putian city by using of statistic,GIS and geo-statistic methods. The result showed that optimal interpolation models of As,Hg,Cr in cultivated land were all ordinary Kriging,while Cd,Pb,Ni,Cu and Zn were simple Kriging,the first local polynomial,completely regularized spline function,the second local polynomial and the second global polynomial respectively,the result provide a scientific reference for directing rational sampling,pollution prevention of heavy metals and environmental protection of cultivated land.