西藏拉萨达孜区沿拉萨河两侧农用地土壤重金属空间分布与土壤环境质量评价  

Spatial Distribution of Soil Heavy Metals and Environmental Quality Assessment in Farmland along the Lhasa River in Dazi Area of Lhasa,Tibet

作　　者：袁宏[1] 赵利[1] 王茂丽 徐开锋 王海勇 尊珠桑姆 YUAN Hong;ZHAO Li;WANG Mao-li(Sichuan Institute of Nuclear Geology,Chengdu,Sichuan 610061;Tibet Autonomous Region Geological and Mineral Exploration and Development Bureau,Lhasa,Tibet 851400)

机构地区：[1]四川省核工业地质调查院,四川成都610061 [2]西藏自治区地质矿产勘查开发局第六地质大队,西藏拉萨851400

出　　处：《安徽农业科学》2018年第28期117-120,126,共5页Journal of Anhui Agricultural Sciences

基　　金：西藏自治区科学技术厅科技项目(CG2H2017000245)

摘　　要：[目的]研究西藏拉萨达孜区沿拉萨河两侧农用地土壤中重金属的含量与分布。[方法]采用数据统计和Kriging空间插值方法,研究土壤8种重金属空间分布特征;采用单因子指数和加权内梅罗指数评价方法,进行土壤环境质量评价。[结果]研究区少数区域存在As和Cu 2种重金属污染问题,其余6种重金属(Hg、Cd、Cr、Pb、Ni和Zn)均表现为未污染状态。[结论]研究区土壤环境质量较好,但局部土壤As污染处于重度污染水平,应引起重视。[Objective]Taking the Dazi area of Lhasa City as the research area,the spatial distribution and environmental quality assessment of soil heavy metals in farmland along the Lhasa River were discussed.[Method]By using data statistics and Kriging spatial interpolation,the spatial distribution characteristics of 8 heavy metals in soil were studied,and the evaluation method of soil environmental quality was completed by using single factor index method and weighted Nemerow index method.[Result]There were two kinds of heavy metal(As and Cu)pollution problems in a few areas of the study area,and the remaining six kinds of heavy metal(Hg,Cd,Cr,Pb,Ni and Zn)showed no pollution.[Conclusion]The overall soil environmental quality of the research area is well,however,as pollution of local soil is at a heavy pollution level,which should be taken seriously.

关 键 词：农用地 重金属 单因子指数法 内梅罗指数法 

分 类 号：X833[环境科学与工程—环境工程]