NAPLプール推定へ向けた時間モーメントの空間変動特性評価
本研究では, NAPLプールがトラップされた飽和均質地盤を対象として移流分散実験を実施し, NaCl水溶液の破過曲線に対する時間モーメント解析により時間モーメント量の空間変動特性とNAPL規模の関連性を検討する. NAPLプール規模と浸透流速を変えた実験の結果, NAPLプールの直下流領域にある観測点の2次および3次モーメント量はNAPLを含有しない地盤に比して1から2オーダー増加し, 横分散の影響を受ける領域においてはNAPLプール規模に応じた時間モーメント特性が観察されることが明らかとなった. また, NAPLプールの影響を受けない観測点を基準とした変動比の導入ならびに時間モーメントの空間...
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| Published in | 環境工学研究論文集 Vol. 44; pp. 641 - 651 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | English Japanese |
| Published |
公益社団法人 土木学会
16.11.2007
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| Online Access | Get full text |
| ISSN | 1341-5115 1884-829X |
| DOI | 10.11532/proes1992.44.641 |
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| Abstract | 本研究では, NAPLプールがトラップされた飽和均質地盤を対象として移流分散実験を実施し, NaCl水溶液の破過曲線に対する時間モーメント解析により時間モーメント量の空間変動特性とNAPL規模の関連性を検討する. NAPLプール規模と浸透流速を変えた実験の結果, NAPLプールの直下流領域にある観測点の2次および3次モーメント量はNAPLを含有しない地盤に比して1から2オーダー増加し, 横分散の影響を受ける領域においてはNAPLプール規模に応じた時間モーメント特性が観察されることが明らかとなった. また, NAPLプールの影響を受けない観測点を基準とした変動比の導入ならびに時間モーメントの空間変動特性に関する総合的評価はNAPLプール規模の推定に向けた有益な手段となり得ることが示唆された. |
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| AbstractList | 本研究では, NAPLプールがトラップされた飽和均質地盤を対象として移流分散実験を実施し, NaCl水溶液の破過曲線に対する時間モーメント解析により時間モーメント量の空間変動特性とNAPL規模の関連性を検討する. NAPLプール規模と浸透流速を変えた実験の結果, NAPLプールの直下流領域にある観測点の2次および3次モーメント量はNAPLを含有しない地盤に比して1から2オーダー増加し, 横分散の影響を受ける領域においてはNAPLプール規模に応じた時間モーメント特性が観察されることが明らかとなった. また, NAPLプールの影響を受けない観測点を基準とした変動比の導入ならびに時間モーメントの空間変動特性に関する総合的評価はNAPLプール規模の推定に向けた有益な手段となり得ることが示唆された. |
| Author | 井上, 一哉 田中, 勉 鈴木, 章世 正木, 一平 |
| Author_xml | – sequence: 1 fullname: 正木, 一平 organization: (株) 日水コン環境事業部 – sequence: 1 fullname: 井上, 一哉 organization: 神戸大学大学院農学研究科 – sequence: 1 fullname: 鈴木, 章世 organization: 神戸大学大学院自然科学研究科 – sequence: 1 fullname: 田中, 勉 organization: 神戸大学大学院農学研究科 |
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| References | 11) Kim H., Annable M. D. and Rao P. S. C.: Influence of air-water interfacial adsorption and gas-phase partitioning on the transport of organic chemicals in unsaturated porous media, Environmental Science and Technology, Vol.32, No.9, pp.1253-1259, 1998. 15) Goldberg, D. E.: Genetic algorithms in search, optimization, and machine learning, Addison-Wesley Publishing, 412p., 1989. 16) Woodbury A., Sudicky E., Ulrych T. J. and Ludwig R: Three-dimensional plume source reconstruction using minimum relative entropy inversion, Journal of Contarninant Hydrology, Vol.32, pp.131-158, 1998. 12) Holman B. A. and Gschwend P. M.: Estimating sorption rates of hydrophobicompounds in iron oxide-and clay-coated aquifer sands, Environmental Science and Technology, Vol.31, No.1, pp.105-113, 1997. 2) Jawitz J. W., Sillan R. K., Annable M. D., Rao P. S. C. and Wamer K.: In-situ alcohol flushing of a DNAPL source zone at a dry cleaner site, Environmental Science and Technology, Vol.34, No.17, pp.3722-3729, 2000. 17) Inoue K, Masaki I. and Tanaka T.: Parameter estimation and contaminant source characterization in horizontal tracer experiment in two-layered porous media, Journal of Rainwater Chatchment Systems, Vol.12, No.1, pp.1-6, 2006. 5) James A. I., Grahem W. D., Harfield K., Rao P. S. C. and Annable M. D.: Optimal estimation of residual non-aqueous phase liquid saturations using partitioning tracer concentration data, Water Resources Research, Vol.33, No.12, pp.2621-2636, 1997. 9) Valocchi A. J.: Validity of the local equilibrium assumption for modeling sorbing solute transporthrough homogeneous soil, Water Resources Research, Vol.21, No.6, pp.808-820, 1986. 14) Goltz M. N. and Roberts P. V.: Using the method of moments to analyze three-dimensional diffusion-limited solute transport from temporal and spatial perspectives, Water Resoures Research, Vol.23, No.8, pp.1575-1585, 1987. 7) Annable M. D., Rao P. S. C., Hatfield K., Graham W. D., Wood A. L. and Enfield C. G.: Partitioning tracers for measuring residual NAPL: results from a field-scale test, Journal of Environmental Engineering, Vol.124, No.6, pp.498-503, 1998. 21) Dagan G. and Fiori A: The influence of pore-scale dispersion on concentration statistical moments in transport through heterogeneous aquifers, Water Resources Research, Vol.33, No.7, pp.1595-1605, 1997. 4) Zhang Y. and Graham W. D.: Partitioning tracer transport in a hydrogeochemically heterogeneous aquifer, Water Resources Research, Vol.37, No.8, pp.2037-2048, 2001. 1) Dai D., Barranco Jr. F. T. and Illangasekare T. H.: Partitioning and interfacial tracers for differentiating NAPL entrapment configuration: column-scale investigations, Environmental Science and Technology, Vol.35, No.24, pp.4894-4899, 2001. 6) Zhang Y. and Graham W. D.: Spatial characterization of a hydrogeochemically heterogeneous aquifer using partitioning tracers: optimal estimation of aquifer parameters, Water Resources Research, Vol.37, No.8, pp.2049-2063, 2001. 8) Annable M. D., Rao P. S. C. and Kim H.: NAPL source zone characterization and remediation technology performance assessment: recent developments and applications of tracer techniques, Journal of Contaminant Hydrology, Vol.45, pp.63-78, 2000. 3) Divine C. E., Sanford W. D. and McCray J. E.: Helium and neon groundwater tracers to measure residual DNAPL: laboratory investigation, Vadose Zone Journal, Vol.2, pp.382-388, 2003. 10) Imhoff P. T. and Pirestani K: Influence of mass transferesistence on detection of nonaqueous phase liquids with partitioning tracer tests, Advances in Water Resources, Vol.27, pp.429-444, 2004. 19) Forrer I., Kasteel R, Flury M. and Fluhler H.: Longitudinal and transverse dispersion in an unsaturated field soil, Water Resources Research, Vol.35, No.10, pp.3049-3060, 1999. 13) Das B. S. and Kluitenberg G.J.: Moment analysis to estimate degradation rate constans from leaching experiments, Soil Science Society of America Journal, Vol.60, pp.1724-1731, 1996. 20) Harleman D. R. F. and Rumer R. R.: Longitudinal and lateral dispersion in an isotropic porous medium, Journal of Fruid Mechanics, Vol.16, pp.385-394, 1963. 18) Inoue K., Kawabata T., Uchida K. and Tanaka T.: An evaluation of dispersion characteristics through a sandy mud soil layer, Proceedings of the 17th International Offihore and Polar Engineering Conference &Exhibition 2007, pp.530-537, 2007. |
| References_xml | – reference: 16) Woodbury A., Sudicky E., Ulrych T. J. and Ludwig R: Three-dimensional plume source reconstruction using minimum relative entropy inversion, Journal of Contarninant Hydrology, Vol.32, pp.131-158, 1998. – reference: 19) Forrer I., Kasteel R, Flury M. and Fluhler H.: Longitudinal and transverse dispersion in an unsaturated field soil, Water Resources Research, Vol.35, No.10, pp.3049-3060, 1999. – reference: 2) Jawitz J. W., Sillan R. K., Annable M. D., Rao P. S. C. and Wamer K.: In-situ alcohol flushing of a DNAPL source zone at a dry cleaner site, Environmental Science and Technology, Vol.34, No.17, pp.3722-3729, 2000. – reference: 1) Dai D., Barranco Jr. F. T. and Illangasekare T. H.: Partitioning and interfacial tracers for differentiating NAPL entrapment configuration: column-scale investigations, Environmental Science and Technology, Vol.35, No.24, pp.4894-4899, 2001. – reference: 8) Annable M. D., Rao P. S. C. and Kim H.: NAPL source zone characterization and remediation technology performance assessment: recent developments and applications of tracer techniques, Journal of Contaminant Hydrology, Vol.45, pp.63-78, 2000. – reference: 21) Dagan G. and Fiori A: The influence of pore-scale dispersion on concentration statistical moments in transport through heterogeneous aquifers, Water Resources Research, Vol.33, No.7, pp.1595-1605, 1997. – reference: 12) Holman B. A. and Gschwend P. M.: Estimating sorption rates of hydrophobicompounds in iron oxide-and clay-coated aquifer sands, Environmental Science and Technology, Vol.31, No.1, pp.105-113, 1997. – reference: 14) Goltz M. N. and Roberts P. V.: Using the method of moments to analyze three-dimensional diffusion-limited solute transport from temporal and spatial perspectives, Water Resoures Research, Vol.23, No.8, pp.1575-1585, 1987. – reference: 4) Zhang Y. and Graham W. D.: Partitioning tracer transport in a hydrogeochemically heterogeneous aquifer, Water Resources Research, Vol.37, No.8, pp.2037-2048, 2001. – reference: 18) Inoue K., Kawabata T., Uchida K. and Tanaka T.: An evaluation of dispersion characteristics through a sandy mud soil layer, Proceedings of the 17th International Offihore and Polar Engineering Conference &Exhibition 2007, pp.530-537, 2007. – reference: 6) Zhang Y. and Graham W. D.: Spatial characterization of a hydrogeochemically heterogeneous aquifer using partitioning tracers: optimal estimation of aquifer parameters, Water Resources Research, Vol.37, No.8, pp.2049-2063, 2001. – reference: 20) Harleman D. R. F. and Rumer R. R.: Longitudinal and lateral dispersion in an isotropic porous medium, Journal of Fruid Mechanics, Vol.16, pp.385-394, 1963. – reference: 13) Das B. S. and Kluitenberg G.J.: Moment analysis to estimate degradation rate constans from leaching experiments, Soil Science Society of America Journal, Vol.60, pp.1724-1731, 1996. – reference: 5) James A. I., Grahem W. D., Harfield K., Rao P. S. C. and Annable M. D.: Optimal estimation of residual non-aqueous phase liquid saturations using partitioning tracer concentration data, Water Resources Research, Vol.33, No.12, pp.2621-2636, 1997. – reference: 17) Inoue K, Masaki I. and Tanaka T.: Parameter estimation and contaminant source characterization in horizontal tracer experiment in two-layered porous media, Journal of Rainwater Chatchment Systems, Vol.12, No.1, pp.1-6, 2006. – reference: 7) Annable M. D., Rao P. S. C., Hatfield K., Graham W. D., Wood A. L. and Enfield C. G.: Partitioning tracers for measuring residual NAPL: results from a field-scale test, Journal of Environmental Engineering, Vol.124, No.6, pp.498-503, 1998. – reference: 9) Valocchi A. J.: Validity of the local equilibrium assumption for modeling sorbing solute transporthrough homogeneous soil, Water Resources Research, Vol.21, No.6, pp.808-820, 1986. – reference: 3) Divine C. E., Sanford W. D. and McCray J. E.: Helium and neon groundwater tracers to measure residual DNAPL: laboratory investigation, Vadose Zone Journal, Vol.2, pp.382-388, 2003. – reference: 10) Imhoff P. T. and Pirestani K: Influence of mass transferesistence on detection of nonaqueous phase liquids with partitioning tracer tests, Advances in Water Resources, Vol.27, pp.429-444, 2004. – reference: 11) Kim H., Annable M. D. and Rao P. S. C.: Influence of air-water interfacial adsorption and gas-phase partitioning on the transport of organic chemicals in unsaturated porous media, Environmental Science and Technology, Vol.32, No.9, pp.1253-1259, 1998. – reference: 15) Goldberg, D. E.: Genetic algorithms in search, optimization, and machine learning, Addison-Wesley Publishing, 412p., 1989. |
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| Snippet | 本研究では, NAPLプールがトラップされた飽和均質地盤を対象として移流分散実験を実施し, NaCl水溶液の破過曲線に対する時間モーメント解析により時間モーメント量の空間変動特性とNAPL規模の関連性を検討する. NAPLプール規模と浸透流速を変えた実験の結果,... |
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| Title | NAPLプール推定へ向けた時間モーメントの空間変動特性評価 |
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