Comprehensive assessment of soil risk in a de-industrialized area in China

摘要

An integrated and quantitative evaluation method based on soil pollution, land use, risk receptor vulnerability, and risk source was developed to assess soil risk in a de-industrialized area. A case study was conducted to understand the spatial and temporal characteristics of soil risk, and the resulting comprehensive soil risk values ranged from 128.24 to 2,3670.50 in 2008 and from 104.08 to 3,8421.70 in 2015. However, this overall increase was inconsistent with the soil pollution trend. The extended Pearson correlation coefficient (ePCC) was calculated for 39,655 extracted data points to comprehensively characterize the risks associated with soil pollution. The ePCC was greater than 1 in most developed and undeveloped blocks, indicating that comprehensive soil risks in these regions were relatively stable and less affected by changes in soil pollution status upon de-industrialization. The ePCC was lower than 0.99 in approximately 35.23% of the study area blocks, where changes in human-land relationships were strong. This study highlighted the complexity of risk characteristics and trends after de-industrialization. Therefore, more precise and regionalized soil risk management methods based on comprehensive risk assessment procedures are required in de-industrialized areas. (C) 2020 Elsevier Ltd. All rights reserved.