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Instrumentation and monitoring of a bentonite landfill liner |
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| Institution: | 1. Department of Civil Engineering, Shanghai University, Shanghai 200444, China;2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;3. Chair of Foundation Engineering, Soil and Rock Mechanics, Ruhr-Universität Bochum, Germany;4. Centre for Built Infrastructure Research, School of Civil and Environmental Engineering, Faculty of Engineering and IT, University of Technology, Sydney, 15 Broadway, Ultimo, NSW2007, Australia |
| Abstract: | A landfill site in northern Wales which lies only a few metres above the local water table was lined with a mixture of locally available sand and imported bentonite. To test the permeability and leachate attenuation capacity of this liner special test chambers lined with high-density polyethylene (HDPE) were constructed underneath the sand-bentonite liner and instrumented to collect samples of any infiltrating water. Over an 18-month period there has been less than 1 mm of infiltration from a completed section of the landfill into the test chambers. No evidence of contamination of the groundwater by the landfill has been detected in test wells. The sampling continues. |
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