Numerical Simulation Of A Smelter Impact On Groundwater

Through the establishment of the aquifer numerical model, and model identification and correction, studied pollutants As migration law in the vadose zone and aquifer, comparing the results of several conditions and lower boundary concentration permeability conditions.. The results showed that the site area seepage damage, no leak, the leak occurred under the conditions of pollutants, pollutants in the vertical direction beginning infiltration, sewage mixing tank leak stopped in 365 days, the simulation time in 400 days, vertically below the surface 2m at the maximum concentration occurs 51.4mg/L, the lower boundary concentration gradually increased, reaching 4.04 mg/L; 400-800 days appear in the lower boundary of the maximum contaminant, was 37.66 mg/L; 800-1200 days, because of adsorption of the vadose zone, the maximum concentration of pollutants down to 6.34 mg/L,1200～1600 days, As the maximum concentration of 0.318 mg/L.The results show that the center of concentration when considering the vadose zone contamination halo in the case of a delay in the disclosure of the vadose zone is not considered before the 5000 days,5000 days after the same two concentrations of pollution halo size of the center, the rate of decline is consistent; without considering the vadose zone contamination area As larger, broader pollution; not consider vadose zone contamination levels halo migration distance is farther.Sewage seepage intact at the bottom of the case continued leakage occurs in the mixing tank effluent downstream groundwater observation wells set at about 20m, observation As concentration, the results show that when the permeability coefficient at 1.00E-07cm/s, aquifers halo central point pollution concentrations exceeding the maximum value in 2000d 0.35 mg/L; it can be seen through the monitoring wells, sewage mixing tank 20 meters of groundwater flow premises detect contaminants as the concentration gradually increased, when the permeability coefficient at 1.00E-07cm/s, monitoring wells to monitor pollutants in 2000 nadir to a maximum concentration of 0.27 mg/L.