金属加工厂附近农田土壤锌污染的地统计学分析  

Geostatistical Analysis of Soil Zinc Contamination in the Vicinity of a Metal-processing Manufacturer

作　　者：孟凡祥[1] 李琪[1] 闻大中[1] 

机构地区：[1]中国科学院沈阳应用生态研究所陆地生态过程重点实验室

出　　处：《沈阳建筑大学学报（自然科学版）》2005年第4期367-370,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家"863"计划重大课题(2004AA246020);辽宁省自然科学基金项目(20042008)

摘　　要：目的为评价金属加工对农田土壤环境造成的影响.方法采用经典统计学与地统计学相结合的方法,研究了沈阳市南郊某有色金属加工厂附近农田土壤全锌含量的空间分布特征.结果在1000 m距离内,土壤全锌含量与样点离加工厂烟囱的距离之间符合二阶多项式关系,并与距离呈显著负相关关系.0～10 cm及10～20 cm土层土壤全锌含量分别达226.92 mg·kg-1和214.24 mg·kg-1,远高于该地区土壤锌含量的背景值.高斯模型与实验半方差变异函数的拟合效果最好,其次是线性模型.0～10 cm及10～20 cm土层土壤瓤嚎具有手相似的空间分布格局,离加工厂烟囱距离越远,土壤全锌含量越低.结论克里格插值得出的土壤全锌含量的空间分布图很好地反映了农田土壤受到金属加工厂污染的情况.To assess the effect of metal-processing industry on the farmland soil environment, the paper examines, by using geostatistics combined with traditional statistics, the spatial distribution of soil total zinc （Zn） in a contaminated field in the vicinity of a metal-processing manufacturer in the southern suburb of Shenyang, China. The results show that the relationship between soil Zn concentrations and the distance from the chimney of the manufacturer within 1000 meters to the sampling sites fits a two-order multinomial model, and soil Zn is negatively correlated with the distance. The average soil Zn concentrations at the depths of 0-10 cm and 10-20 cm are 226.92 mg·kg^-1 and 214.24 mg·kg^-1, far higher than the background value of soil Zn in the studied region. The best fitted theoretical model for the semivariogram is Gaussian model, and then the linear model. Soil total Zn concentration at the depth of 0-10 cm and 10-20 cm exhibites a similar spatial distribution pattern. The farther from the chimney of the manufacturer, the lower the concentration of soil total Zn. The distribution maps of soil Zn obtained with kriging reflect the status of farmland soil contamination induced by the metal-processing manufacturer.

关 键 词：土壤污染 锌 地统计学 空间变异 

分 类 号：X53[环境科学与工程—环境工程]