186 Predication and Evaluation on Contamination Leakage of Landfill Leachate

Municipal refuse is the main contamination source of soil and groundwater. The typical contamination of landfill leachate transport in seepage control system was studied, and the model for predicting the concentration distribution and migration of leachate in landfill was established based on groundwater seepage theory in porous medium and solute transfer theory. Then taking copper and zinc as example, the model was used to quantitative analysis the concentration distribution and to evaluate the developmental trend of pollution. In the designed working term of 30 years, the retardation ratio of the seepage control system is 83.43% for zinc and the ration for copper is up to 90.8%. The results show that the leachate and contaminants are retarded in seepage control system built in landfill.