Evaluating effects of wind-induced pressure fluctuations on soil-atmosphere gas exchange at a landfill using stochastic modelling

Tjalfe G. Poulsen*, Per Møldrup

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

The impact of wind turbulence-induced pressure fluctuations at the soil surface on landfill gas transport and emissions to the atmosphere at an old Danish landfill site was investigated using stochastic modelling combined with soil property and gas transport data measured at the site. The impacts of soil physical properties (including air permeability and volumetric water content) and wind-induced pressure fluctuation properties (amplitude and temporal correlation) on landfill gas emissions to the atmosphere were evaluated. Soil-air permeability and pressure fluctuation amplitude were found to be the most important parameters. Wind-induced gas emissions were further compared with gas emissions caused by diffusion and by long-term pressure variations (due to passing weather systems). Here diffusion and wind-induced gas transport were found to be equally important with wind-induced gas transport becoming the most important at lower soil-air contents.

Original languageEnglish
Pages (from-to)473-481
Number of pages9
JournalWaste Management and Research
Volume24
Issue number5
DOIs
StatePublished - Oct 2006
Externally publishedYes

Keywords

  • Landfill gas transport
  • Pressure fluctuations
  • Soil properties
  • Stochastic modelling: Wmr 928-2
  • Wind turbulence

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