城市表层土壤重金属污染评价  

Evaluation of Surface Soil Heavy Metal Pollution in City

作　　者：代永强[1] 王联国[1] DAI Yong-qiang;WANG Lian-guo(College of Information Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China)

机构地区：[1]甘肃农业大学信息科学技术学院

出　　处：《计算机与现代化》2019年第8期105-111,共7页Computer and Modernization

基　　金：甘肃农业大学学科建设专项基金资助项目(GAU-XKJS-2018-253);甘肃农业大学青年导师基金资助项目(GAU-QDFC-2019-02);国家自然科学基金资助项目(61751313)

摘　　要：针对重金属污染破坏土壤环境,直接或间接危害人体健康的现状,提出一种基于投影寻踪和地统计学模型的城市表层土壤重金属污染评价方法。该方法通过对某城市城区土壤中8种重金属进行分析,运用投影寻踪模型获得重金属对城市表层土壤污染指数,进而对城市各区表层土壤重金属整体污染水平做出评价;运用地统计学模型研究重金属的空间分布特征,在此基础上对重金属污染影响因素进行定量分析,确定污染源位置。研究成果对于研究城市地质环境演变和制定预防措施具有一定的参考价值。Aiming at the current situation that heavy metal pollution destroies the soil environment, and directly or indirectly harms human health, an evaluation of surface soil heavy metal pollution in city based on projection pursuit and geostatistics is proposed. Firstly, eight heavy metals in a city soil are analyzed, the pollution index of the urban surface soil is obtained by using the projection pursuit model, and the overall pollution levels of soil heavy metals in different regions of the city are evaluated. Finally, the spatial distribution characteristics of heavy metals are studied by using geostatistics and GIS, the corresponding pollution assessment is given, and the quantitative analysis of the heavy metal pollution is carried on based on the influence factors, the position of pollution sources is determined. The research results are of some reference value for the study of the evolution of urban geological environment and the development of preventive measures.

关 键 词：重金属 地统计学 投影寻踪 地理信息系统 

分 类 号：TP181[自动化与计算机技术—控制理论与控制工程]