热带地理2011，Vol.31Issue(6)：559-564,6.
经济快速发展城郊区土壤重金属空间分布及潜在生态危害评价—以慈溪市横河镇为例
Spatial Distribution and Pollution Evaluation of Soil Heavy Metals in Rapidly Developing Suburb Regions
摘要
Abstract
Spatial distribution, sources and spatial heterogeneity of heavy metals are studied by using geo-statistic approach and ArcGIS in Henghe town, Cixi city in Zhejiang province. Heavy metal pollution in the soil is evaluated by ecological risk index method. The results show that the actual content of all the heavy metals in the soil is over their original background level, with a moderate variance index. According to heterogeneity model and related parameter, Cd, Pb have the strongest spatial correlation, while others keeping moderate. The spatial interpolation maps reveal that the seven elements have different spatial distribution characteristics. The high remainder of Cu,Zn,Pb,Cr content is found in the north of the region, the content of Cd is higher in the west and east but lower in the middle. As decreases gradually from the west- north region to the east-south region, the distribution of Hg is more complicated than that of the others. In addition, various distribution has been influenced by the two factors: human activity and the soil itself. The ecological risk index method indicates that about 80% of the studied area has reach middle and severe harm degree. The risk order of heavy metals is Hg>Cd>As>Pb>Cu >Cr>Zn.关键词
土壤重金属/污染评价/空间变异/横河镇Key words
soil heavy metal/ pollution evaluation/ spatial variability/ Henghe town分类
农业科技引用本文复制引用
王宏,吕殿青,刘庆,韩贻强,候旭蕾,刘小梅..经济快速发展城郊区土壤重金属空间分布及潜在生态危害评价—以慈溪市横河镇为例[J].热带地理,2011,31(6):559-564,6.基金项目
湖南省自然科学基金项目(11JJ2012) （11JJ2012）
湖南省重点学科自然地理学项目(2008001) （2008001）
湖南省科技计划项目(2011FJ3224) （2011FJ3224）
