基于地理信息的污染耕地土壤重金属元素含量分布特征提取研究  

Research on Extracting the Distribution Characteristics of Heavy Metal Element Content in Polluted Farmland Soil Based on Geographic Information

作　　者：沈迎志 俞鹏程 郭健 Shen Yingzhi;Yu Pengcheng;Guo Jian(Star Space(Tianjin)Technology Development Co.,Ltd.,Tianjin 300384,China;Tianjin Landuse Affairs Center(Integrated Service Center of Tianjin China International Mining Conference),Tianjin 300000,China;Tianjin Academy of Environmental Sciences,Tianjin 300071,China)

机构地区：[1]星际空间(天津)科技发展有限公司,天津300384 [2]天津市土地利用事务中心(天津市中国国际矿业大会综合服务中心),天津300000 [3]天津市生态环境科学研究院,天津300071

出　　处：《环境科学与管理》2024年第8期135-139,144,共6页Environmental Science and Management

摘　　要：污染耕地土壤重金属元素含量分布特征提取涉及不同地理区域和土壤类型,获取大范围土壤重金属元素含量数据难度大,因此提出基于地理信息的污染耕地土壤重金属元素含量分布特征提取方法。以某市为例,采集该市污染耕地土壤与植物样本,利用色谱仪测定样本内重金属元素含量,并采用地理信息系统获取辅助信息,得到大范围土壤重金属元素含量数据,结合投影寻踪函数实现土壤重金属元素含量分布特征提取。试验结果表明,该方法可有效提取出该市污染耕地的重金属元素类别和含量,且地理信息系统生成的分布特征可视化效果较好,特征提取精度高。It is difficult to obtain large-scale soil heavy metal element content data due to the diversities in geographical regions and sopil types when researching on the distribution characteristics of heavy metal element content in polluted farmland soil.Therefore,a geographic information based method for extracting the distribution characteristics of heavy metal element content in polluted farmland soil is proposed.Taking a certain city as an example,samples of polluted farmland soil and plants were collected,and the content of heavy metal elements in the samples was measured using a chromatograph.The geographic information system was used to obtain auxiliary information,and large-scale soil heavy metal element content data was obtained.Combined with projection pursuit function,the distribution characteristics of soil heavy metal element content were extracted.The experimental results show that this method can effectively extract the categories and contents of heavy metal elements in polluted farmland in the city,and the distribution characteristics generated by the geographic information system have good visualization effects and high accuracy in feature extraction.

关 键 词：地理信息 污染耕地 金属元素 含量分布 特征提取 

分 类 号：X833[环境科学与工程—环境工程]