WANG Xiao-hong，ZHANG Xin-yu，LIN-Jian

(Hydrogeology and Engineering Geology Team of Beijing, Beijing100195，China)

Abstract: Organically contaminated site imposed serious threat to groundwater environment. This paper aims at the influence on groundwater environment of chemical industry’s wastewater and waste solid. On the basis of distinguishing the factors affecting groundwater environmental bearing capacity and pollutant infiltration, the index system for groundwater risk assessment was established with scientific, pertinent and operational principles. Furthermore, the assignment method and selection principle of every index were given. Then, the index system was applied to groundwater risk assessment at a typical organically contaminated site. The assessment results showed the groundwater pollution risk was high in the area with high groundwater natural anti-fouling ability and low site contaminated risk. On the other hand, the groundwater pollution risk was low in the area with high groundwater natural anti-fouling ability and low potential site contaminated risk. The assessment result was reliable. The research showed the index system and its section principle and assignment method were reasonable, and it is of  practical application value.

Key words: contaminated site; groundwater environment; potential risk; organic pollution; assessment index; risk assessment

EARTH AND ENVIRONMENT Vol. 40, No.1, Tot No.287, 2012, Page 126-132