摘要
本文首先探讨了利用GIS技术构建上海市基本农田土壤重金属数据库的方法,该数据库集空间数据、采样点监测数据和元数据于一体,对于土壤重金属信息的管理、应用服务等具有重要的基础作用,是农产品安全生产环境认证和土壤环境长效管理的重要依据;接着,基于数据库进行了重金属元素的描述性统计、动态累积和Kriging插值分析;结果表明,除As外,其余重金属平均含量均高于该区域的背景值含量,尤其是Cd、Hg、Zn、Cu累积指数较高,是上海市农田土壤重金属污染的主要元素。
Based on GIS technology, a database of heavy metal in agricultural soils of Shanghai, which was composed of spatial data, sample monitoring data and meta data, was developed for the purpose of soil environmental spatial-temporal analysis. The data- base plays a key role in the regional soil heavy metal data management and service. Through descriptive statistic analysis, temporal concentration process analysis and Kriging geostatistical analysis, the authors found that, apart from As, all the other soil heavy metals, such as Cd, Zn, Hg, Cu, Pb and Cr, exceeded their background levels in concentration in agricultural soils of Shanghai. Especially, Cd, Hg, Zn and Cu ranked high in concentration index, and were recognized as the key polluting heavy metals in soils of this region.
出处
《测绘科学》
CSCD
北大核心
2010年第4期184-186,共3页
Science of Surveying and Mapping
基金
上海市教委重点学科"地理学与城市环境"项目(J50402)
上海市教委基金项目(06DZ021)
上海师范大学科研项目(SK200846)
上海师范大学重点培育学科项目资助(DZL801)
关键词
农田土壤
重金属
数据库
上海
agricultural soil
heavy metals
database
Shanghai
