PUBLICATIONS

NOTE: Most of my papers are available in PDF format, but some copyright limitations may apply to these PDF files.

Book Chapters

  1. Lu, Z., D. Zhang, and Y. Chen, Information fusion using the Kalman Filter based on Karhunen-Leove decomposition, in Quantitative Information Fusion for Hydrological Sciences Cai and Yeh (eds), ISBN:978-3-540-75383-4, 218p, 2008.

Manuscripts to be submitted soon

Peer-reviewed Journal Papers

  1. Chang, H, D. Zhang, and Lu, Z., History matching of facies distribution with the EnKF and level set parameterization, submitted to Journal of Computaitonal Physics, 2009

  2. Lu, Z., H. Deng, Z. Dai, A. Wolfsberg, and P. Reimus Quantifying uncertainty of effective transport parameters , submitted to Geophysical Research Letters, 2009

  3. Lu, Z., A. Wolfsberg, Z. Dai, and C. Zheng Characteristics and controlling factors of dispersion in bounded, randomly heterogeneous porous media, submitted to Water Resources Research, 2009

  4. Deng, H., Z. Dai,A. Wolfsberg, Lu, Z., M. Ye, and P. Reimus, Upscaling sorption coefficient for fractured rocks with multimodal reactive mineral facies, submitted to Water Resources Research, 2009

  5. Lu, Z., Andrew V. Wolfsberg, and Chuan Lu, Assessment of contaminant fate using importance sampling methods, submitted to Water Resources Research, 2009.

  6. Robinson B. A.,Z. Lu, and D. Pasqualini, Simulating solute transport in porous media using model reduction techniques, submitted to Advances in Water Resources, 2009.

  7. Li, W., Z. Lu, and D. Zhang, Stochastic analysis of unsaturated flow with probabilistic collocation method,Water Resour. Res., 45, W08425, doi:10.1029/2008WR007530, 2009.

  8. Dai, Z., A. Wolfsberg, Z. Lu, amd H. Deng, Scale dependence of sorption coefficients for contaminant transport in saturated fractured rock, Geophys. Res. Lett., 36, L01403, dod:10.1029/2008GL036516, 2009.

  9. Li, C., Z. Lu, T. Ma, and X. Zhu, A simple kriging method incorporating multiscale measurements in geochemical surveys, Journal of Geochemical Exploration, 101, 147-154, 2009.

  10. Chen, M., A. Keller, and Z. Lu,, Stochastic analysis of transient three-phase flow in heterogeneous porous media, Stochastic Environmental Research and Risk Assessment, DOI 10.1007/s00477-007-0198-y, 2007.

  11. Dai, Z., A. Wolfsberg, Lu, Z., and B. Ritzi, Representing aquifer architecture in macrodispersivity models with an analytical solution of the transition probability matrix, Geophysical Research Letter, 34, L20406, doi:10.1029/2007GL031608, 2007.

  12. Lu, Z., D. Zhang, and B. A. Robinson, Explicit analytical solutions for one-dimensional steady state flow in layered, heterogeneous unsaturated soils under random boundary conditions, Water Resource Research , 43, W09413, doi:10.1029/2005WR004795, 2007.

  13. Chen, M., Z. Lu, and G. A. Zyvoloski, Conditional simulations of transient water-oil flow in randomly heterogeneous porous media, Stochastic Environmental Research and Risk Assessment, DOI 10.1007/s00477-007-0178-2, 2007.

  14. Liu, G., Z. Lu, and D. Zhang, Stochastic uncertainty analysis for solute transport in randomly heterogeneous media us ing a Karhunen-Loeve based moment equation approach, Water Resour. Res., 43, W07427, doi: 10.1029/2006WR005193, 2007.

  15. Lu, Z., and D. Zhang, Stochastic simulations for flow in nonstationary randomly heterogeneous media using a Karhunen-Loeve based moment-equation approach, SIAM Multiscale Model. Simul., 6(1), 228-245, 2007.

  16. Dai, Z., A. Wolfsberg, Z. Lu, and P. Reimus, Upscaling matrix diffusion coefficients for multimodal heterogeneous fractured rocks, Geophysical Research Letters, 34, L07408, doi:10.1029/2007GL029332, 2007.

  17. Zhang, D., Z. Lu, , and Y. Chen, Dynamic reservoir data assimilation with an efficient, dimension-reduced Kalman filter , SPE Journal , 12(1), 10.2118/95277-PA, 108-117, 2007.

  18. Liu, G., D. Zhang, and Z. Lu Stochastic uncertainty analysis for unconfined flow systems, Water Resources Research, 42, W09412, doi:10.1029/2005WR004766, 2006.

  19. Lu, Z., and B. Robinson, Parameter structure identification using the level set method, movie1, movie2, Geophys. Res. Letts., 33, L06404, doi:10.1029/2005GL025541, 2006.

  20. Lu, Z., and D. Zhang, Accurate, efficient quantification of uncertainty for flow in heterogeneous reservoirs using the KLME approach, SPE Journal, 11(2), 10.2118/ 93452-PA, 239-247, 2006.

  21. Chen, M., A. A., Keller, D. Zhang, Z. Lu, and G. A. Zyvoloski, A stochastic analysis of transient two-phase flow in heterogeneous porous media, Water Resources Research, 42, W03425, doi:10.1029/2005WR004257, 2006.

  22. Yuan, F, and Z. Lu, Analytical solutions for vertical unsaturated flow in rooted soils with variable surface fluxes, Vadose Zone Journal, 4(4), 1210-1218, 2005.

  23. Robinson, B. A., G. Cole, J. M. Carey, M. Witkowski,C W. Gable, Z. Lu, and R. Gray, A vadose zone flow and transport model for Los Alamos Canyon, Los Alamos, New Mexico , Vadose Zone Journal, 4(3), 729-943, 2005.

  24. Lu, Z. and D. Zhang, Analytical solutions of statistical moments for transient flow in two-dimensional bounded, randomly heterogeneous media, Water Resources Research, 41, W01016, doi:10.1029/2004WR3389, 2005.

  25. Chen, M., D. Zhang, A.A. Keller, and Z. Lu, A stochastic analysis of steady state two-phase flow in heterogeneous media , Water Resources Research, 41, W01016, doi:10.1029/2004WR003412, 2005.

  26. Lu, Z. , and D. Zhang, A comparative study on quantifying uncertainty of flow in heterogeneous media using Monte Carlo simulations, the conventional and the KL-based moment-equation approaches, SIAM J. on Scientific Computing, 26(2), 558-577, 2004.

  27. Lu, Z. and D. Zhang, Conditional simulations of flow in randomly heterogeneous porous media using a KL-based moment-equation approach, Advances in Water Resources, 27(9), 859-874, 2004.

  28. Lu, Z. and D. Zhang, Analytical solutions to steady state unsaturated flow in layered, randomly heterogeneous soils via Kirchhoff transformation, Advances in Water Resources, 27(8), 775-784, 2004.

  29. Yang, J., D. Zhang, and Z. Lu, Stochastic analysis of saturated-unsaturated flow in heterogeneous media by combining Karhunen-Loeve expansion and perturbation method, J. of Hydrology, 294, 18-38, 2004.

  30. Zhang, D. and Lu, Z. , Stochastic delineation of well capture zones, Stochastic Envir. Res. and Risk Assessment, 18(1), 39-46, 2004.

  31. Zhang, D. and Lu, Z. , An efficient, higher-order perturbation approach for flow in randomly heterogeneous porous media via Karhunen-Loeve decomposition, Journal of Computational Physics, 194(2), 773-794, 2004.

  32. Lu, Z. , and D. Zhang, On importance sampling Monte Carlo approach to flow and transport in heterogeneous geological formations, 26(11), 1177-1188, Advances in Water Resour. , 2003.

  33. Tartakovsky, D. M., Z. Lu, A. Guadagnini, and A. Tartakovsky, Unsaturated flow in heterogeneous soils with spatially distributed uncertain hydraulic parameters, J. Hydrology, 275, 182-193, 2003.

  34. Lu, Z. , and D. Zhang, Stochastic studies of well capture zones in bounded heterogeneous media, Water Resour. Res., 39(4), 1100, doi:10.1029/2002WR001633, 2003.

  35. Lu, Z. , and D. Zhang, Solute spreading in nonstationary flows in bounded heterogeneous saturated-unsaturated media, Water Resour. Res., 39(3), 1049, doi:10.1029/2001WR000908,2003.

  36. Keating, E., V. Vesselinov, E. Kwicklis, and Z. Lu, Coupling large- and local-scale inverse models of the Espanola basin, Ground Water, 41, 200-211, 2003.

  37. Lu, Z. , and D. Zhang, On stochastic modeling of flow in multimodal heterogeneous formations, Water Resour. Res., 38(10), 1190, doi:10.1029/2001WR001026, 2002.

  38. Lu, Z. , and D. Zhang, Stochastic analysis of transient flow in heterogeneous variably saturated porous media: the van Genuchten-Mualem constitutive model, Vadose Zone Journal, 1, 137-149, 2002.

  39. Khaleel, R., T.-C. J. Yeh, and Z. Lu, Upscaled flow and transport properties for heterogeneous unsaturated media, Water Resour. Res., 38(5), 1053, 10.1029/ 2000WR000072, 2002.

  40. Lu, Z. , S. P. Neuman, A. Guadagnini, and D. M., Tartakovsky, Conditional moment analysis of steady state unsaturated flow in bounded, randomly heterogeneous soils, Water Resour. Res., 38(4), 1038, 10.1029/2001WR000278, 2002.

  41. Zhang, D., and Z. Lu, Stochastic analysis of flow in a heterogeneous unsaturated-saturated system, Water Resour. Res., 38(2), 1018, doi:10.1029/2001 WR000515, 2002.

  42. Tartakovsky, D. M., S. P. Neuman, and Z. Lu, Conditional stochastic averaging of steady state unsaturated flow by means of Kirchhoff transformation, Water Resour. Res., 35(3), 731-745, 1999.

Proceeding Papers

  1. Lu, Z., B. Robinson, and C. Lu, Identification of geological structures using the level set method, MODFLOW and More Conference, 2006.

  2. Liu, G., Lu Z., and D. Zhang, MODFLOW-STO: Stochastic modeling of flow in saturated porous media using MODFLOW-2000, MODFLOW and More Conference, 2006

  3. Zhang, D., Z. Lu, and G. Liu, An efficient stochastic decomposition approach for large-scale subsurface flow problems, 16th International Conference on Computational Methods in Water Resources, 2006.

  4. Lu, Z., Parameter identification using the level set methods, the 16th International Conference on Computational Methods in Water Resources, 2006.

  5. Zhang, D., Lu, Z. , and Y. Chen, Dynamic reservoir data assimilation with an efficient, dimension-reduced Kalman filter , The 2005 SPE Annual Technical Conference and Exhibition , SPE95277, 2005.

  6. Lu, Z. , and D. Zhang, Accurate, efficient quantification of uncertainty for flow in heterogeneous reservoirs using the KLME approach, The 2005 SPE Reservoir Simulation Symposium , SPE93452, 2005.

  7. Lu, Z. , D. Higdon, and D. Zhang, A Markov Chain Monte Carlo method for the groundwater inverse problem, Proceedings of the 15th International Conference on Computational Methods in Water Resources, 1273-1283, 2004.

  8. Lu, Z. , and D. Zhang, An efficient approach for simulating saturated flow in randomly heterogeneous porous media conditioned on hydraulic conductivity measurements, Proceedings of MODFLOW and More 2003: Understanding through Modeling, 2003.

  9. Lu, Z. , and D. Zhang, Higher-order approximations for saturated flow in random heterogeneous media via Karhunen-Loeve decomposition, Proceedings of World Water & Environmental Resources Congress 2003 and Symposium of Probabilistic Approaches and Groundwater Modeling, 2003.

  10. Zhang, D., and Z. Lu, Monte Carlo simulations of solute transport in bimodal randomly heterogeneous porous media, in Groundwater Quality Modeling and management Under Uncertainty by S. Mishra (eds), doi 10.1061/4069, 101-111, 2003.

  11. Lu, Z. , and D. Zhang, Stochastic analysis of flow in heterogeneous, nonstationary unsaturated-saturated porous media, Proceedings of the 10th International High-Level Radioactive Waste Management Conference, American Nuclear Society, 13-19, 2003

  12. Zhang, D., and Z. Lu, Stochastic analysis of well capture zones in heterogeneous porous media, Proceedings of the 4th International Conference on Calibrating and Reliability in Groundwater Modeling, K. Kovar and Z. Hrkal, eds., 492-495, 2002.

  13. Lu, Z. , D. Zhang, and E. Keating, Applicability of unimodal stochastic approaches in simulating flow in bimodal heterogeneous formations, Bridging the Gap between Measurement and Modeling in Heterogeneous Media, Proceedings of the International Groundwater Symposium, A. N. Findikakis (ed.), 71-74, 2002.

  14. Khaleel, R., T.-C. J. Yeh, and Z. Lu, Effective hydraulic conductivity and macrodispersivity estimates for heterogeneous unsaturated media, Computation Methods in Water Resources, S. M. Hassanizadeh, R. J. Schotting, W. G. Gray, and G. F. Pinder, eds., 1211-1218, 2002.

  15. Keating, E., V. V. Vesselinov, E. Kwicklis, and Z. Lu, Coupling a large-scale basin model with a high resolution local model using a finite-element flow and transport solver (FEHM) and an automated parameter estimator (PEST), Proceedings of MODFLOW 2001 and Other Modeling Odysseys, 168-173, 2001.

  16. Lu, Z. , S. P., Neuman, A. Guadagnini, and D. M. Tartakovsky, Direct solution of unsaturated flow in randomly heterogeneous soils. Proceedings of the XIII International Conference on Computational Methods in Water Resources, L.R. Bentley, J.F. Sykes, C.A. Brebbia, W.G. Grey, and G.F. Pinder, eds., 785-792, 2000

  17. Neuman, S. P., D. M. Tartakovsky, C. Filippone, O. Amir, and Z. Lu, Deterministic prediction of unsaturated flow in randomly heterogeneous soils under uncertainty without upscaling, Proceedings of the International Workshop on t;Characterization and Measurement of the Hydraulic Properties of Unsaturated Porous Media,1351-1365, 1999

  18. Neuman, S. P., D. M. Tartakovsky, Z. Lu, O. Amir, and A. Guadagnini, Preservation of constitutive nonlinearities in moment analyses of unsaturated flow through randomly heterogeneous soils, SIAM MiniSymposium, 1999.

Published Abstracts/Presentations

  1. Lu, Z., and B. Robinson, Parameter Identification Using Level Set Methods, EOS. Trans. AGU, 87(52), Fall Meeting Suppl., Abstract H42A-03, 2006.

  2. Lu, Z., and B. A., Robinson (2006), Uncertainty quantification for flow and transport using model reduction techniques, Eos Trans. AGU, 87(36), West. Pac. Geophys. Meet. Suppl., Abstract H12A-06.

  3. Robinson, B. A., and Z. Lu (2006), A radionuclide transport model for the unsaturated zone at Yucca Mountain, Eos Trans. AGU, 87(36), West. Pac. Geophys. Meet. Suppl., Abstract H11E-04.

  4. Chen, M, A Keller, D Zhang, Z. Lu, G Zyvoloski , A stochastic analysis of transient two-phase flow in heterogeneous porous media, EOS Trans, AGU, 86(52), Fall Meet. Suppl., Abstract H11D-1284, 2005.

  5. Zhang,D., Z. Lu, and Y. Chen, Efficient uncertainty quantification and model updating of subsurface flow models , EOS Trans, AGU, 86(52), Fall Meet. Suppl., Abstract H11E-05, 2005.

  6. Liu, G., D. Zhang, and Z. Lu, MODFLOW_STO: Stochastic modeling of flow in saturated porous media using MODFLOW-2000, EOS Trans., AGU, 86(52), Fall Meet. Suppl., Abstract, 2005.

  7. Lu, Z., and D. Zhang, An efficient data assimilation technique using Karhunen-Loeve Kalman filter, EOS. Trans. AGU, 85(47), Fall Meeting Suppl., Abstract SF11A-07, 2004.

  8. Robinson, B., Z. Lu, D. Higdon, and B. Newman, Characterization of unsaturated soil properties using a Markov Chain Monte Carlo approach, EOS. Trans. AGU, 85(47), Fall Meeting Suppl., H11B-0295, 2004.

  9. Zyvoloski, G., E. Keating, B. Robinson, and Z. Lu , Simulating contaminant transport in Heterogeneous media using the dual porosity method, EOS. Trans. AGU, 85(47), Fall Meeting Suppl., H33F-0538, 2004

  10. Chen, M. D. Zhang, A. Keller, and Z. Lu, Stochastic analysis of water-oil phase flow in heterogeneous meida by combining Karhunen-Loeve expansion and perturbation method, EOS. Trans. AGU, 85(47), Fall Meeting Suppl., H43H-07, 2004

  11. Lu, Z. and D. Zhang, Evaluation of higher-order moments for flow in randomly heterogeneous porous media via Karhunen-Loeve decomposition, EOS Trans. AGU, 83, Fall Meet. Auppl. Abstract H61E-04, 2002.

  12. Lu, Z. and D. Zhang, A general stochastic model for solute transport in bounded heterogeneous unsaturated-saturated media, EOS Trans. AGU, 82(47), Fall Meet. Auppl. Abstract H22E-0378, 2001.

  13. Neuman, S. P., A. Hernandez, J. Carrera, A. Guadagnini, and Z. Lu, Accounting for predictive errors due to combined effects of stochastic averaging and regression, EOS Trans. AGU, 81(48), Fall Meet. Auppl. Abstract H11G-08, 2000.

  14. Lu, Z. , A. Guadagnini, D. M. Tartakovsky, and S. P. Neuman, Nonlocal finite element analysis of conditional steady state unsaturated flow in bounded randomly heterogeneous soils using Kirchhoff transformation, EOS Trans. AGU, 79(45), Fall Meet. Auppl. Abstract H41G-05, 1998. Click here to view the slides.

  15. Neuman, S. P., D. M. Tartakovsky, Z. Lu, O. Amir, and A. Guadagnini, Preservation of constitutive nonlinearities in moment analyses of unsaturated flow through randomly heterogeneous soils, SIAM MiniSymposium, Los Angles, March 1999.

  16. Tartakovsky, D. M., S. P. Neuman, and Z. Lu, Stochastic averaging of steady state unsaturated flow by means of Kirchhoff Transformation, EOS Trans. AGU, 78(46), Fall Meet. Auppl. Abstract H41C-2, 1997.

Technical Reports

  1. Lu, Z., and B. Robinson, Effect of grid resolution on simulation of perched water zones, a report submitted to LANL Groundwater Protection Program for FY06 Vadose Zone Project deliverable, 2006.

  2. Lu, Z., and B. Robinson, Infiltration estimates from borehole water content data using the Markov Chain Monte Carlo method, a report submitted to LANL Groundwater Protection Program for FY05 Vadose Zone Project deliverable, 2005.

  3. Keating, E., B. Robinson, K. Birdsell, Z. Lu, and V. Vesselinov, Hydrological Synthesis Report to LANL Groundwater Protection Program, 4: Numerical models, 2005.

  4. Keating, E., V. V. Vesselinov, Z. Lu, and E. Kwicklis, Annual Report on Regional Aquifer Modeling and Data Analysis, Technical Report of Los Alamos National Laboratory, LA-UR-02-484, 2001.

  5. Lu, Z. , D. Zhang, and E. Keating, Applicability of unimodal stochastic approaches in simulating flow in bimodal heterogeneous formations, Technical Report of Los Alamos National Laboratory, LA-UR-01-4747, 2001

  6. Keating, E. H., E. Kwicklis, V. V. Vesselinov, A. M Idar, Z. Lu, G. A. Zyvoloski, and M. S. Witkowski, A Regional Flow and Transport Model for Groundwater at Loa Alamos National Laboratory, A progress report submitted to the Hydrologic Characterization Program. LA-UR-01-2199, 2000.

  7. Lu, Z. , S. P. Neuman, A. Gaudagnini, and D. M. Tartakovsky, Conditional moment analysis of steady state unsaturated flow in bounded, randomly heterogeneous soils based on Kirchhoff transformation: 1, Recursive finite element formulation, Technical Report of Los Alamos National Laboratory, LA-UR-00-5199, 2000.

  8. Robinson, B., E. Keating, B. Newman, K. Birdsell, B. Carey, M. Witkowski, Z. Lu, A. Idar, M. Haagenstad, G. Zyvoloski, V. Vesselinov, Process-Level and System Models of Groundwater Flow and Transport Beneath the Pajarito Plateau: Migration of High Explosives from Technical Area 16. A report submitted to ADLSSR office, 2000.

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