| Responding to the urgent requirement for effective management of contaminated petroleum sites, this paper presents a GIS-supported environmental risk assessment approach for managing petroleum-contaminated aquifers. It contains two components: environmental risk assessment and geographic information system (GIS). Using the existing monitoring data and predicted fate of contaminant transport under various contamination and remediation scenarios, comprehensive environmental risk assessment can be conducted. Data originating from exposure dose model can be incorporated into different risk analysis frameworks to achieve integrated risk levels. Results of a case study indicated that solutions for risk assessment under different environmental conditions have been generated, and they can be used to effectively estimate and analyze various uncertainties in subsurface systems. The results also demonstrate that integration of risk assessment with geo-spatial analysis is helpful for identifying and assessing pollution impacts on specific receptors in a spatial format. |
