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Analyses on Solute Transport with the Movement of an LNAPL on the Water Table  

김지훈 (서울대학교 지구환경시스템공학부)
최종근 (서울대학교 지구환경시스템공학부)
Publication Information
Journal of Soil and Groundwater Environment / v.8, no.3, 2003 , pp. 1-7 More about this Journal
Abstract
A modified model was developed for solute transport in porous media that can consider the movement of an LNAPL above the water table. From the results of sensitivity analyses with and without considering LNAPL movement, there are some differences according to the hydraulic gradient, the quantity of oil leakage and dispersivity. The mean deviation between the model in this study and a conventional model without LNAPL movement increases as the hydraulic gradient decreases and the quantity of oil leakage increases. Variation of dispersivity has no influence on the magnitude of the mean deviation. However, the spatial distribution of the deviation between the two models is wider as dispersivity increases. Furthermore, groundwater is at high risk of contamination in the vertical direction in the case that transverse dispersion value is large. A conventional model underestimates the concentration of solute in an aquifer where the movement of an LNAPL cannot be negligible: Based on the study results, it is important to understand how fast the LNAPL moves on the water table for realistic prediction of solute transport in an aquifer with the movable LNAPL on the water table.
Keywords
movement of an LNAPL; solute transport; vertical equilibrium; UST;
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1 Bear, J. and Ryzhik, V, 'On the Displacement of NAPL Lenses and Plumes in a Phreatic Aquifer,' Transport in Porous Media, 33, pp. 227-255 (1998)   DOI   ScienceOn
2 Seagren, E. A. and Rittmann, B. E., 'A Chtical Evaluation of the Local-Equilibrium Assumption in Modeling NAPL-Pool Dissolution,' J. of Contaminant HydroIogy, 39, pp.109-135 (1999)   DOI   ScienceOn
3 Brauner, J. S. and Widdowson, M. A. 'Numerical Simula-tion of a Natural Attenuation Experiment with a Petroleum Hydrocarbon NAPL Source,' Ground Water, 39(6), pp.939-952 (2001)   DOI   ScienceOn
4 Jang, M. and Choe, J., 'Stochastic Optimixation for Global Minimization and Geostatistical Calibradon,' J. of Hydrology, 266, pp. 40-52 (2002)   DOI
5 Jang, M., Lee, J., Choe, J., and Kang, J. M., 'Modeling of Solute Transport in a Single Fracture using Streamline Simulation and Experimental Validadon,' J. of Hydrology, 261, pp. 74-85 (2002)   DOI   ScienceOn
6 Kool, J. B. and Parker, J. C., 'Development Evaluation of Closed-Form Expressions for Hysteric Soil Hydraulic Properties,' Water Resources Research, 23(1), pp. 105-114 (1987)   DOI   ScienceOn
7 Bear, J., Ryzhik, V., Braester, C., and Entov, V., 'On the movement of an LNAPL lens on the water table,' Transport in Porous Media, 25, pp. 283-311 (1996)   DOI   ScienceOn
8 Baehr, A. L. and Corapcioglu, M. Y., 'Compositional Mul-tiphase Model for Groundwater Contamination by Petro-leum Products 2. Numerical Solution,' Water ResourcesResearch, 23(1), pp. 201-213 (1987)   DOI   ScienceOn
9 Knutson, C. E., Werth, C. J., and Valocchi, A. J., 'Pore-scale Modeling of Dissolution from Variably Distributed Nonaqueous Phase Liquid Blobs,' Water Resource Research, 37(12), pp. 2951-2963 (2001)   DOI   ScienceOn
10 Corapcioglu, M. Y. and Baehr, A. L., 'Compositional Multiphase Model for Groundwater Contamination by Petroleum Products 1. Theoretical Consideradons,' Water Resources Researvh, 23(1), pp. 191-200 (1987)   DOI   ScienceOn
11 최종근,공간정보모델링:크리깅과 최적화, 1판, 구미서관, 서울 (2002)
12 Domenico, P. A. and Schwartz, F. W., Physical and Chemical Hydrogeology, 1st Ed., John Wiley & Sons Inc., New York, USA (1990)
13 Bradford, S. A. and Abriola, L. M., 'Dissoludon of Residual Tetrachloroethylene in Fractional Wettability Porous Media: Incorporation of Interfacial Area Estimates,' Water Resources Research, 37(5), pp. 1183-1195 (2001)   DOI   ScienceOn
14 Bedient, P. B., Rifai, H. S. and Newell, C. J., Ground Water Contamination: Transport and Remediadon, 1st Ed., Prentice Hall PTR, Englewood Cliffs, New Jersey (1994)
15 Zhou, D., Dillard, L. A., and Blunt, M. J., 'A Physically Based Model of Dissolution of Nonaqueous Phase Liquid in the Saturated Zone,' transport in Porous Media, 39, pp.227-255 (2000)   DOI   ScienceOn