Experimental Confirmation of the Rainwater Infiltration Suppression Effect of Alternative Cover Materials (Part 2)

Abstract

Leachate from the final disposal site must be continuously treated until the site is closed, even after the landfill operation has ended. As a result, it is necessary to operate the leachate treatment facility for a long period, leading to maintenance and management costs that become an economic burden. Therefore, it is essential to reduce leachate until the final disposal site is closed.

To reduce the volume of leachate, it is most effective to discharge rainwater as surface runoff as much as possible. Previous studies have confirmed that by applying a 15% diluted cover soil substitute to compacted cover soil, the surface runoff rate is higher compared to using only cover soil (indoor artificial rainfall experiment)1).

This report presents the results of experiments conducted to confirm the rainwater infiltration suppression effect of the cover soil substitute by performing outdoor natural rainfall experiments and verifying the surface runoff function through the application of the cover soil substitute at an actual final disposal site.