Research On Groundwater Environmental Impact Assessment Of Mining Area On The West Side Of Luanhe River In Qian’an City

With the continuous expansion of mining scale and mining quantity of metal mines,there are more and more potential safety and environmental problems.Therefore,it is necessary to evaluate and forecast the groundwater environment around the mine,and predict the influence of pollution components on the groundwater environment around the mine in the future,so as to provide reference for the protection of groundwater environment.Taking the groundwater of the west side of the luanhe river in qian ’an as an example,by using single factor standard index method and nemerow pollution index method to evaluate and analyze the groundwater quality in the study area,it is concluded the water quality evaluation results obtained by using single factor standard index method are relatively general,and all of them reach the level of groundwater Ⅲ.The most influential metal indexes are iron,manganese and lead.The non-metallic indexes that affect more seriously are nitrate,ammonia nitrogen and fluoride.The evaluation results obtained by nemerow pollution index method were divided into categories,and the groundwater types in the study area were divided in more detail.Therefore,the combination of the two evaluation methods can better explain the water quality of the whole region.By using FEFLOW7.4 software to analyze the groundwater solute transport model in the mining area of Zhaodianzi Town,the results showed that the maximum concentration of iron ion is 0.28mg/L,and the maximum concentration of fluoride ion is 0.67mg/L,which is in line with the limit value of class III standard in Groundwater Quality Standards GB/T14848-93.During the solute transport simulation,the solute transport model of 100 d,1000d,3650 d and 7200 d was analyzed,and it was concluded that the concentration of iron ion and fluoride ion decreased with the time migration,which would not pollute the groundwater quality and the surrounding sensitive points within a certain range.The study shows that the solute transport trend of groundwater in the west side of the luanhe River in Qian ’an can be summarized by evaluating and simulating groundwater in zhaodianzi town by using single-factor standard index method nemerow pollution index method and numerical simulation method.Through the evaluation and analysis of the groundwater quality in the whole region,it is concluded that there are no over standard factors in the whole region,and the more serious water quality indexes are selected.With the migration of time,the concentration of these water quality indexes decreases in a certain space,which will not cause pollution to the groundwater in the whole region This study can provide reference for the protection of surrounding groundwater and prevention of groundwater pollution,and can provide reference for the simulation of groundwater evaluation in mountain similar to iron mine in the future.Figure 43;Table 18;Reference 64...