Preliminary Study On Environmental Risk Assessment Of Groundwater And Case Study

Production and life of people in the groundwater as an important water pollution has received many threats. In present the risk of groundwater pollution are relatively small. The risk of groundwater pollution research is still in the initial stage of development, there were no environmental risk assessment of groundwater research. By understanding this paper hydrogeological conditions of groundwater environment factors, the analysis compared the characteristics of environmental risk assessment of groundwater, and groundwater risk assessment procedures, contents and methods were discussed.Groundwater environmental risk assessment based on risk identification, source analysis, risk calculation, the consequences of assessment, risk management, the following five aspects. Among them, the risk identification process must be concerned about the incident of leakage of toxic and hazardous liquid substances or soluble solid material; source analysis and risk evaluation of technical guidelines for other environmental factors in the analysis of the source terms are basically the same; risk calculation mode selected short-term release of sources when saturated with pollutants to reach the concentration calculation; the use of health risk assessment model the consequences of groundwater pollution risk assessment; Finally, risk prevention measures for groundwater and contingency plans.Northwest arid area also select a company proposed 100kt/a chromate cleaner production and comprehensive utilization of resources of underground water project as an example for environmental risk assessment case studies, by calculating the pollutants to reach groundwater Cr6+when the concentration of saturated water zone 20mg/L, Cr6+on the human body non-carcinogenic hazard index of 9.67, greater than 1, the firm concluded the case without making seepage control measures can not accept hazardous pollutants.Environmental risk assessment procedures through the groundwater, content and methods of study for environmental risk assessment of groundwater and to carry out the work of reference, the risk of groundwater pollution conditions for further research.