MapGIS技术支持下的宜宾市翠屏区宋家乡环境地球化学质量评价

MAP GIS ENVIRONMENTAL GEOCHEMICAL QUALITY ASSESSMENT OF SOILS IN SONGJIA TOWN OF CUIPING DISTRICT,YIBIN CITY,CHINA

采用地质累积指数和污染程度分析方法,结合MapGIS空间分析技术,对宜宾市翠屏区宋家乡项目区土地质量进行系统的环境地球化学质量评价,重点对调查区的重金属元素(As、Hg、Cd、Cr、Zn、Cu、Pb、Ni)情况进行土壤质量评价。结果显示,宋家乡研究区土壤中存在不同程度的Hg、Cd、Cr、Zn、Pb、Ni和Cu重金属超标,主要集中在洋坪村、丘陵村和大地村,而大地村的镉超标较为严重,整个研究区砷没有出现污染。为此,结合实际查明造成重金属污染的原因,为该区土壤资源、环境评价和农业经济发展规划提供实用的地球化学信息。

Based on the geoaccumulation index, contamination degree and spatial analysis methods of MapGIS, the environmental geochemical quality assessment of soils in Songjia Town of Cuiping District of Yibin City was conducted. The focus was put on the assessment of the contamination of heavy metal elements （As, Hg, Cd, Cr, Zn,Cu, Pb, Ni）. The results showed that soils in Songjia Town have suffered different extents of contamination of Hg, Cd, Cr, Zn, Pb, Ni and Cu, mainly at the Yangping Village, Qiuling Village and Dadi Village. Soils at the Dadi Village have been polluted by CA most seriously, and no sign of As pollution has been found in the whole area studied. Investigations into the causes of heavy metal pollution in this area have provided applicable geochemical information for overall planning involved in soil resources, environmental assessment and development of agricultural economy.