Pollutant Transport Model and Numerical Simulation in Landfill Site

摘要

The simulation model for describing the transportation and transformation of landfill leachate pollutant in landfill, soil and underground water was established. Taking Wuhan Changshankou landfill for example, the numerical simulation was carried out. The simulation results showed that if there's no any seepage control measure, the groundwater and soil under landfill will be polluted seriously after MSW was filled; the highest pollutant concetration in landfill was about 25000 mg·L~(-1), and the one in groundwater and soil was about 20000 mg·L~(-1); at the thirtieth year, the pollutant concetration in groundwater and soil still remained up to 10000 mg·L~(-1) although the one in landfill was about 0. The simulation results also showed that the vertical stonewall can't be used as a nature, and artificial seepage control system must be used.