ADCs influence how stormwater interacts with the landfill by limiting direct contact between rainfall and exposed waste. Materials that form a continuous barrier, such as synthetic liners or foams, reduce the amount of water that infiltrates the waste, which in turn lowers the volume of leachate that must be managed.
By controlling water flow, they also help prevent erosion and the movement of debris offsite. Loose or organic covers can absorb some moisture while still allowing partial infiltration, which may be managed through the landfill’s drainage system. Properly applied covers help maintain stable surface conditions, reduce environmental risks, and support compliance with regulations governing stormwater management.