Investigation and evaluation of soil quality along the middle route of the South-to-North Water Diversion Project(Zhengzhou section)
In order to prevent and control the impact of heavy metal in soil in the riverside zone on the water quality of the South-to-North Water Diversion Project,the contents of As,Cd,Cr,Zn,Cu,Pb,Hg and Ni in soil samples along the middle route of the South-to-North Water Diversion(Zhengzhou section)are analyzed,and the soil pollution status in this area is evaluated.The results show that the average content of 8 heavy metals is low and the overall soil quality is good;Through the analysis of the coefficient of variation,it is found that Cd and Hg have a high degree of dispersion and are greatly affected by human activities;From the study of spatial distribution,the contents of heavy metals such as Pb,Cd,Hg and Zn on both sides of expressways and railways are significantly higher than the overall average;The potential ecological risk assessment shows that the comprehensive potential risk index of the expressway area is greater than 150,reaching a medium potential ecological risk,and Cd and Hg account for a large contribution rate,which is 46.84％and 35.80％.
South-to-North Water Diversion Projectsoilheavy metalsspatial distributionecological risk
万方数据
维普
