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A Novel Waste-Cover-Waste Three-layer Landfill Cover System without Geomembrane: from Theory to Practice

  • C. W.W. Ng
  • , H. W. Guo
  • , H. Q. Chen
  • , W. Wei
  • , Q. Xue
  • Hong Kong University of Science and Technology
  • Xiaping Municipal Solid Waste Landfill
  • CAS - Wuhan Institute of Rock and Soil Mechanics

Research output: Contribution to journalConference articlepeer-review

Abstract

This paper describes the theoretical framework for a novel waste-cover-waste three-layer landfill cover system without the use of geomembrane but vegetation. The research methodology adopted includes laboratory column tests quantifying the transpiration-induced suction in vegetated three-layer cover systems using construction waste without geomembrane but with different plant species, and full-scale monitoring of field performance of the novel three-layer landfill cover system using natural soils for 6 years, in the areas where the annual rainfall exceeded 2,000mm. Moreover, the research also includes the combined use of vegetation and biochar together with construction waste in another field trial of the novel three-layer landfill cover system without geomembraner for 16 months. The results of laboratory and field-monitored matric suction, volumetric water content and percolation will be reported and explained. Design recommendations will be given.

Original languageEnglish
Pages (from-to)11-23
Number of pages13
JournalProceedings of the International Congress on Environmental Geotechnics
DOIs
StatePublished - 2023
Externally publishedYes
Event9th International Congress on Environmental Geotechnics, ICEG 2023 - Chania, Greece
Duration: 25 Jun 202328 Jun 2023

Keywords

  • biochar
  • construction waste
  • plant
  • three-layer landfill cover
  • water infiltration

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