广东惠州市土壤七氯残留状况及空间分布特征

Residues and Spatial Distribution of Heptachlor in Soils of Huizhou,Guangdong Province

摘要: 以广东惠州市为例,通过克里格插值法分析研究区土壤七氯含量的空间分布特征。结果表明,研究区表层土壤七氯平均含量为0.09μg·kg^-1,但区域差异很大,最高值达到0.54μg·kg^-1。与国内外不同区域比较,惠州市土壤七氯含量相对较低。七氯在土壤剖面中的垂直分布总体上随着土层深度的增加而降低,表层土壤七氯含量具有强烈的空间相关性C₀/(C₀+C)=0。克里格插值结果显示惠州市表层土壤中七氯的高含量区域主要分布在惠东县,在博罗县也有2处岛状高含量区。

Abstract: Spatial distribution of heptachlor in Huizhou was analyzed through ordinary Kriging interpolation.Results show that the average content of heptachlor in the surface soil of Huizhou was 0.09 μg·kg^-1,but varied greatly between regions.Compared to other regions in China and other countries,the content of heptachlor in the soils of Huizhou was relatively lower.In soil profiles,heptachlor contents decreased with increasing of depth.Heptachlor contents in surface soils demonstrate obvious spatial relativityC₀/(C₀+C)=0.Results of the ordinary Kriging interpolation show that in Huizhou,high contents of heptachlor are distributed mainly in Huidong County,and in two isle-shaped areas in Boluo County.