3상 거동 상대투수율 선정에 따른 불포화대 및 포화대 내NAPL 거동 특성 연구 (NAPL Fate and Transport in the Saturated and Unsaturated Zones Dependent on Three-phase Relative Permeability Model)

서지정보

· 발행기관 : 한국지하수토양환경학회
· 수록지 정보 : 지하수토양환경 / 27권 / 75 ~ 91페이지
· 저자명 : 김태훈, 한원식, 전현정, 양우종, 윤원우

초록

Differences in subsurface migration of LNAPL/DNAPL contaminants caused by a selection of 3-phase (aqueous, NAPL,and gas) relative permeability function (RPF) models in numerical modeling were investigated. Several types of RPFmodels developed from both experimental and theoretical backgrounds were introduced prior to conducting numericalmodeling. Among the RPF models, two representative models (Stone I and Parker model) were employed to simulatesubsurface LNAPLs/DNAPLs migration through numerical calculation. For each model, the spatiotemporal distribution ofindividual phases and the mole fractions of 6 NAPL components (4 LNAPL and 2 DNAPL components) were calculatedthrough a multi-phase and multi-component numerical simulator. The simulation results indicated that both spilledLNAPLs and DNAPLs in the unsaturated zone migrated faster and reached the groundwater table sooner for Stone Imodel than Parker model while LNAPLs migrated faster on the groundwater table under Parker model. This resultssignified the crucial effect of 3-phase relative permeability on the prediction of NAPL contamination and suggested thatRPF models should be carefully selected based on adequate verification processes for proper implementation of numericalmodels.

영어초록

Differences in subsurface migration of LNAPL/DNAPL contaminants caused by a selection of 3-phase (aqueous, NAPL,and gas) relative permeability function (RPF) models in numerical modeling were investigated. Several types of RPFmodels developed from both experimental and theoretical backgrounds were introduced prior to conducting numericalmodeling. Among the RPF models, two representative models (Stone I and Parker model) were employed to simulatesubsurface LNAPLs/DNAPLs migration through numerical calculation. For each model, the spatiotemporal distribution ofindividual phases and the mole fractions of 6 NAPL components (4 LNAPL and 2 DNAPL components) were calculatedthrough a multi-phase and multi-component numerical simulator. The simulation results indicated that both spilledLNAPLs and DNAPLs in the unsaturated zone migrated faster and reached the groundwater table sooner for Stone Imodel than Parker model while LNAPLs migrated faster on the groundwater table under Parker model. This resultssignified the crucial effect of 3-phase relative permeability on the prediction of NAPL contamination and suggested thatRPF models should be carefully selected based on adequate verification processes for proper implementation of numericalmodels.

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