Design of landfill liners for fine grained soils using CTRAN/W

• Main Authors: Harish Kumar Reddy, P., Ramya Krishna, V., Srinivas, K.
• Format: Conference Proceeding
• Language: English
• Subjects: Clay liners; Contaminant transport; CTRAN-SEEP analysis; Geostudio; Leachate
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2020.12.857

The management and disposal of municipal solid waste (MSW) in many countries has changed significantly. To overcome the risk to environment and humans, landfills are designed and constructed to dump the waste in the ground and covered with soil, vegetation to protect the environment. Engineered landfills are provided with various liner systems. Liners used in the landfill acts as a barrier to water, leachate and other liquid materials. Liners also protect the ground from solute concentration. In the present study, compacted clay liners of various thicknesses are used. A numerical model of a landfill with the clay liner is designed and analysis is performed using GeoStudio software. In this software CTRAN/W module is used for contaminant transport analysis. From the landfill at different radial distances three bore holes are provided with varying depths respectively, also clay liner thicknesses of 0.5 m, 1.0 m, 1.5 m. Tests on the soil like standard proctor test and hydraulic conductivity tests are conducted. Results shows, with the increase in liner thickness, time taken by the contaminant transport to reach bore wells increases. Results also show the rate of variation in concentration of the leachate at each bore well in certain time period.