Risk assessment of groundwater pollution in the in-situ leaching mining area of rare earth

Based on the comprehensive analysis of hydrogeological features in rare earth mining area, in-situ leaching mining characteristic, and groundwater source, integrated muli-intdex models including groundwater intrinsic vulnerability, contaminant sources and the value of groundwater are constructed to evaluate the risk of groundwater pollution in ion-absorbed rare earth mining area and a groundwater pollution risk evaluation index system is developed. The models are applied to the assessment of groundwater pollution risk of a ion-ab - sorbed rare earth mining area in southern China as a case study．The results indicate that the classification of evaluation indexes of groundwater pollution risk fits well with the level of actual observation of groundwater pollution in this rare earth mining area, and the method is reasonable and effective.