重庆三峡库区耕地土壤重金属含量的空间变异性研究  

Spatial variability of heavy metals in soil of Three-Gorges Reservior in Chongqing

作　　者：杨梅[1] 刘洪斌[2] 武伟[3] 

机构地区：[1]四川农业大学都江堰分校信息工程系,都江堰611830 [2]中国科学院地球化学研究所,贵阳550005 [3]西南农业大学信息学院,重庆400716

出　　处：《中国生态农业学报》2006年第1期100-103,共4页Chinese Journal of Eco-Agriculture

基　　金：重庆市教委科技项目(011802)资助

摘　　要：对重庆三峡库区耕地土壤重金属含量的空间变异性研究结果表明,Hg和Cr服从对数正态分布,拟合得到Hg与Cr的半方差函数模型分别为幂函数和球状模型,且在一定范围内存在空间相关性;采用Kriging内插法对未测点重金属进行最优估计,所绘制的Kriging插值图反映了该区耕地土壤重金属Hg和Cr的空间变异特征。The spatial variability of heavy metals in soil of Three-Gorges Reservior in Chongqing was studied. The results show that the Hg and Cr of soil heavy metal are distributed lognormally. The semivariogram models of Hg and Cr are power and spherical. These observed items are correlated in a given spatial range. The kriging method is applied to estimate the unobserved points and their group maps are obtained. The spatial variabilities of the heavy metals in Chongqing can be reflected clearly in the maps.

关 键 词：重金属 空间变异 半方差函数模型 克里格插值 

分 类 号：X53[环境科学与工程—环境工程] TV632[水利工程—水利水电工程]