title: A field study to estimate the vertical gas diffusivity and permeability of compacted MSW using a barometric pumping analytical model.
abstract: The measurement of vertical gas diffusivity and permeability of compacted municipal solid waste (MSW) using an analytical gas flow and transport model was evaluated. A series of pressure transducers were buried in a MSW landfill and in situ pressures were modelled using an algorithm that predicts soil-gas pressures based on field-measured barometric pressure data and vertical diffusivity. The vertical gas diffusivity that represented the best-fit of the measured pressures was estimated at 20 locations and ranged from 0.002 to 0.052 m2 s(-1). The vertical gas permeability ranged from 3.3 × 10(-14) to 4.5 × 10(-12) m2 for the upper-most 3 to 6 m of compacted MSW. The shortfalls of applying this method to landfill conditions are also discussed.
authors.affiliation: Department of Environmental Engineering Sciences, University of Florida, Gainesville, FL 32611–6450, USA.
authors.forename: Judd
authors.initials: J
authors.lastname: Larson
authors.forename: Sendhil
authors.initials: S
authors.lastname: Kumar
authors.forename: S Adrian
authors.initials: SA
authors.lastname: Gale
authors.forename: Pradeep
authors.initials: P
authors.lastname: Jain
authors.forename: Timothy
authors.initials: T
authors.lastname: Townsend
mesh_terms: D000399:Air Pressure; D004058:Diffusion; D004784:Environmental Monitoring / Q000379:methods*; D005431:Florida; D005740:Gases / Q000737:chemistry*; D008962:Models, Theoretical; D010539:Permeability; D016062:Porosity; D012037:Refuse Disposal; D012987:Soil; D012989:Soil Pollutants / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D005740:Gases; D012987:Soil; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical