Methodology of quantitative groundwater environmental risk assessment and a case analysis of a landfill site
By comparing qualitative and quantitative risk assessment methods for groundwater in landfill sites.The use of quantitative assessment methods allowed for a better quantification of pollutant migration processes.The article introduced the basic theories of the simplified dilution model of Fick's law and Darcy's law and the quantitative assessment method of the LandSim model,and conducted a quantitative groundwater environmental risk assessment for a certain landfill.The study established a hydrogeological conceptual model,quantitatively assessed shallow groundwater using a simplified dilution model based on Fick's Law and Darcy's Law,and quantitatively assessed deep groundwater using the LandSim probabilistic risk assessment model.The calculated and predicted results were compared with Level Ⅲ Standards for groundwater quality,resulting in the potential groundwater contamination risks for each receptor.Analyzing the trend of pollutant components led to the conclusion that after 170～200 years of landfill operation,the predicted concentrations of ammonia nitrogen and chloride reached their maximum at the drinking water wells,greatly exceeding the Level Ⅲ Standards for groundwater quality,making the probability of contaminating the groundwater under the landfill site greatest.
万方数据
维普
