Development and applications of the HYDRUS and STANMOD software packages and related codes

Vadose Zone Journal

Volumn 7, Issue 2, 2008, Pages 587-600

  Šimůnek, Jiří ^a   Van Genuchten, Martinus Th ^b   Šejna, Miroslav ^c  

^a UNIVERSITY OF CALIFORNIA   (United States)

^b U S SALINITY LABORATORY   (United States)

^c PC Progress Ltd   (Czech Republic)

Author keywords

[No Author keywords available]

Indexed keywords

DATABASE; HYDRAULIC PROPERTY; LABORATORY METHOD; NUMERICAL MODEL; RESEARCH WORK; SOFTWARE; SOLUTE TRANSPORT; UNSATURATED FLOW; VADOSE ZONE; WORLD WIDE WEB;

ASIA; BELGIUM; BENELUX; CENTRAL EUROPE; CZECH REPUBLIC; EURASIA; EUROPE; ISRAEL; MIDDLE EAST; NETHERLANDS; NORTH AMERICA; UNITED STATES; WESTERN EUROPE;

EID: 44949172553     PISSN: None     EISSN: 15391663     Source Type: Journal    
DOI: 10.2136/vzj2007.0077     Document Type: Article

References (157)

1. Arya, L.M., F.J. Leij, P.J. Shouse, and M.Th. van Genuchten. 1999a. Relationship between the hydraulic conductivity function and the particle-size distribution. Soil Sci. Soc. Am. J. 63:1063-1070.
2. Arya, L.M., F.J. Leij, M.Th. van Genuchten, and P.J. Shouse. 1999b. Scaling parameter to predict the soil water characteristic from particle-size distribution data. Soil Sci. Soc. Am. J. 63:510-519.
3. Assouline, S. 2002. The effects of microdrip and conventional drip irrigation on water distribution and uptake. Soil Sci. Soc. Am. J. 66:1630-1636.
4. Beggs, R.A., G. Tchobanoglous, D. Hills, and R.W. Crites. 2004. Modeling subsurface drip application of onsite wastewater treatment system effluent. p. 92-103. In On-Site Wastewater Treatment, Proc. Natl. Symp. on Individual and Small Community Sewage Systems, 10th, Sacramento, CA. 21-24 Mar. 2004. Am. Soc. Agric. Eng., St. Joseph, MI.
5. Benjamin, J.G., H.R. Havis, L.R. Ahuja, and C.V. Alonso. 1994. Leaching and water flow patterns in every-furrow and alternate-furrow irrigation. Soil Sci. Soc. Am. J. 58:1511-1517.
6. Bradford, S.A., M. Bettehar, J. Šimůnek, and M.Th. van Genuchten. 2004. Straining and attachment of colloids in physically heterogeneous porous media. Vadose Zone J. 3:384-394.
7. Bradford, S.A., J. Šimůnek, M. Bettehar, M.Th. van Genuchten, and S.R. Yates. 2003. Modeling colloid attachment, straining, and exclusion in saturated porous media. Environ. Sci. Technol. 37:2242-2250.
8. Bradford, S.A., S.R. Yates, M. Bettehar, and J. Šimůnek. 2002. Physical factors affecting the transport and fate of colloids in saturated porous media. Water Resour. Res. 38(12):1327, doi:10.1029/2002WR001340.
9. Brooks, R.H., and A.T. Corey. 1964. Hydraulic properties of porous media. Hydrol. Pap. 3. Colorado State Univ., Fort Collins.
10. Carsel, R.F., and R.S. Parrish. 1988. Developing joint probability distributions of soil water retention characteristics. Water Resour. Res. 24:755-769.
11. Casey, F.X.M., G.L. Larsen, H. Hakk, and J. Šimůnek. 2003. Fate and transport of 17β-estradiol in soil-water systems. Environ. Sci. Technol. 37:2400-2409.
12. Casey, F.X.M., and J. Šimůnek. 2001. Inverse analyses of the transport of chlorinated hydrocarbons subject to sequential transformation reactions. J. Environ. Qual. 30:1354-1360.
13. Celia, M.A., E.T. Bououtas, and R.L. Zarba. 1990. A general mass-conservative numerical solution for the unsaturated flow equation. Water Resour. Res. 26:1483-1496.
14. Cote, C.M., K.L. Bristow, P.B. Charlesworth, F.J. Cook, and P.J. Thorburn. 2003. Analysis of soil wetting and solute transport in subsurface trickle irrigation. Irrig. Sci. 22:143-156.
15. Davis, L.A., and S.P. Neuman. 1983. Documentation and user's guide: UNSAT2 - Variably saturated flow model. Final Rep. WWL/TM-1791-1. Water, Waste & Land, Ft. Collins, CO.
16. Decker, D.L., J. Šimůnek, S.W. Tyler, Ch. Papelis, and M. Logsdon. 2006. Variably saturated reactive transport of arsenic in heap leach facilities. Vadose Zone J. 5:430-444.
17. de Vos, J.A., D. Hesterberg, and P.A.C. Raats. 2000. Nitrate leaching in a tile-drained silt loam soil. Soil Sci. Soc. Am. J. 64:517-527.
18. Diodato, D.M. 2000. Review: HYDRUS-2D. Ground Water 38:10-11.
19. Divine, C.E. 2003. STANMOD software review. Southwest Hydrol. 3:37.
20. Dontsova, K.M., S.L. Yost, J. Šimůnek, J.C. Pennington, and C. Williford. 2006. Dissolution and transport of TNT, RDX, and Composition B in saturated soil columns. J. Environ. Qual. 35:2043-2054.
21. Durner, W. 1994. Hydraulic conductivity estimation for soils with heterogeneous pore structure. Water Resour. Res. 32:211-223.
22. Feddes, R.A., P.J. Kowalik, and H. Zaradny. 1978. Simulation of field water use and crop yield. John Wiley & Sons, New York.
23. Gärdenäs, A., J.W. Hopmans, B.R. Hanson, and J. Šimůnek. 2005. Two-dimensional modeling of nitrate leaching for various fertigation scenarios under micro-irrigation. Agric. Water Manage. 74:219-242.
24. Gargiulo, G., S.A. Bradford, J. Šimůnek, P. Ustohal, H. Vereecken, and E. Klumpp. 2007a. Transport and deposition of metabolically active and stationary phase Deinococcus radiodurans in unsaturated porous media. Environ. Sci. Technol. 41:1265-1271.
25. Gargiulo, G., S.A. Bradford, J. Šimůnek, P. Ustohal, H. Vereecken, and E. Klumpp. 2007b. Bacteria transport and deposition under unsaturated conditions: The role of the matrix grain size and the bacteria surface protein. J. Contam. Hydrol. 92:255-273.
26. Gargiulo, G., S.A. Bradford, J. Šimůnek, P. Ustohal, H. Vereecken, and E. Klumpp. 2008. Bacteria transport and deposition under unsaturated conditions: The role of water content and bacteria surface hydrobophicity. Vadose Zone J. 7:406-419 (this issue).
27. Gerke, H.H., and M.Th. van Genuchten. 1993. A dual-porosity model for simulating the preferential movement of water and solutes in structured porous media. Water Resour. Res. 29:305-319.
28. Gonçalves, M.C., J. Šimůnek, T.B. Ramos, J.C. Martins, M.J. Neves, and F.P. Pires. 2006. Multicomponent solute transport in soil lysimeters irrigated with waters of different quality. Water Resour. Res. 42:W08401, doi:10.1029/2005WR004802.
29. Hammel, K., and K. Roth. 1998. Approximation of asymptotic dispersivity of conservative solute in unsaturated heterogeneous media with steady state flow. Water Resour. Res. 34:709-715.
30. Hanson, B.R., J.W. Hopmans, and J. Šimůnek. 2008. Leaching with subsurface drip irrigation under saline, shallow groundwater conditions. Vadose Zone J. 7:810-818 (this issue).
31. Hanson, B.R., J. Šimůnek, and J.W. Hopmans. 2006. Numerical modeling of urea-ammonium-nitrate fertigation under microirrigation. Agric. Water Manage. 86:102-113.
32. Hansson, K., L.-Ch. Lundin, and J. Šimůnek. 2005. Modeling water flow patterns in flexible pavements. Transp. Res. Rec. 1936:133-141.
33. Hansson, K., J. Šimůnek, M. Mizoguchi, and L.-Ch. Lundin. 2004. Water flow and heat transport in frozen soil: Numerical solution and freeze/thaw applications. Vadose Zone J. 3:693-704.
34. Harbaugh, A.W., E.R. Banta, M.C. Hill, and M.G. McDonald. 2000. MODFLOW-2000, the U.S. Geological Survey modular ground-water model: User guide to modularization concepts and the ground-water flow process. Open File Rep. 00-92. USGS, Denver, CO.
35. Hardelauf, H., M. Javaux, M. Herbst, S. Gottschalk, R. Kasteel, J. Vanderborght, and H. Vereecken. 2007. PARSWMS: A parallelized model for simulating three-dimensional water flow and solute transport in variably saturated soils. Vadose Zone J. 6:255-259.
36. Haws, N.W., P.S.C. Rao, J. Šimůnek, and I.C. Poyer. 2005. Single-porosity and dual-porosity modeling of water flow and solute transport in subsurface-drained fields using effective field-scale parameters. J. Hydrol. 313:257-273.
37. Hopmans, J.W., J. Šimůnek, N. Romano, and W. Durner. 2002. Inverse modeling of transient water flow. p. 963-1008. In J.H. Dane and G.C. Topp (ed.) Methods of soil analysis. Part 4. Physical methods. SSSA Book Ser. 5. SSSA, Madison, WI.
38. Jacques, D., and J. Šimůnek. 2005. User manual of the multicomponent variably-saturated flow and transport model HP1: Description, verification, and examples. Version 1.0. BLG-998. Waste and Disposal, SCK·CEN, Mol, Belgium.
39. Jacques, D., J. Šimůnek, D. Mallants, and M.Th. van Genuchten. 2003. The HYDRUS-PHREEQC multicomponent transport model for variably-saturated porous media: Code verification and application. p. 23-27. In E. Poeter et al. (ed.) MODFLOW and More 2003: Understanding through modeling. Proc. Conf., Golden, CO. Sept. 2003. Int. Ground Water Modeling Ctr., Colorado School of Mines, Golden.
40. Jacques, D., J. Šimůnek, D. Mallants, and M.Th. van Genuchten. 2006. Operator-splitting errors in coupled reactive transport codes for transient variably saturated flow and contaminant transport in layered soil profiles. J. Contam. Hydrol. 88:197-218.
41. Jacques, D., J. Šimůnek, D. Mallants, and M.Th. van Genuchten. 2008a. Modeling coupled water flow, solute transport and geochemical reactions affecting heavy metal migration in a podzol soil. Geoderma (in press).
42. Jacques, D., J. Šimůnek, D. Mallants, and M.Th. van Genuchten. 2008b. Modeling coupled hydrologic and chemical processes: Long-term uranium transport following phosphorus fertilization. Vadose Zone J. 7:698-711 (this issue).
43. Jury, W.A., W.F. Spencer, and W.J. Farmer. 1983. Behavior assessment model for trace organics in soil: I. Description of model. J. Environ. Qual. 12:558-564.
44. Kodešová, R., M. Kočárek, V. Kodeš, J. Šimůnek, and J. Kozák. 2008. Impact of soil micromorphological features on water flow and herbicide transport in soils. Vadose Zone J. 7:798-809 (this issue).
45. Köhne, J.M., S. Köhne, and J. Šimůnek. 2006. Multi-process herbicide transport in structured soil columns: Experiment and model analysis. J. Contam. Hydrol. 85:1-32.
46. Köhne, J.M., B. Mohanty, J. Šimůnek, and H.H. Gerke. 2004. Numerical evaluation of a second-order water transfer term for variably saturated dual-permeability models. Water Resour. Res. 40:W07409, doi:10.1029/2004WR003285.
47. Kool, J.B., and M.Th. van Genuchten. 1991. HYDRUS: One-dimensional variably saturated flow and transport model, including hysteresis and root water uptake. Version 3.3. Res. Rep. 124. U.S. Salinity Lab., Riverside, CA.
48. Kosugi, K. 1996. Lognormal distribution model for unsaturated soil hydraulic properties. Water Resour. Res. 32:2697-2703.
49. Kravchenko, A., and R. Zhang. 1998. Estimating the soil water retention curve from particle-size distriutions: A fractal approach. Soil Sci. 163:171-179.
50. Kundzewicz, Z.W., and D. Koutsoyiannis. 2007. Editorial-Quantifying the impact of hydrological studies. Hydrol. Sci. J. 52:3-17.
51. Lain, J., and M. Šejna. 1992. Unstructured triangular meshes and TVD schemes for fluid flow computations. p. 83-94. In K. Kozel (ed.) Numerical methods solving 2D and 3D inviscid and viscous flows, Proc. Seminar, 2nd, Prague. Sept. 1992. Czech Tech. Univ., Prague, Czech Republic.
52. Langergraber, G., and J. Šimůnek. 2005. Modeling variably saturated water flow and multi-component reactive transport in constructed wetlands. Vadose Zone J. 4:924-938.
53. Langergraber, G., and J. Šimůnek. 2006. The multi-component reactive transport module CW2D for constructed wetlands for the HYDRUS software package. Manual, Version 1.0. HYDRUS Softw. Ser. 2. Dep. of Environ. Sci., Univ. of California, Riverside.
54. Lazarovitch, N., J. Šimůnek, and U. Shani. 2005. System dependent boundary condition for water flow from subsurface source. Soil Sci. Soc. Am. J. 69:46-50.
55. Lazarovitch, N., A.W. Warrick, A. Furman, and J. Šimůnek. 2007. Subsurface water distribution from drip irrigation described by moment analyses. Vadose Zone J. 6:116-123.
56. Leij, F.J., W.J. Alves, M.Th. van Genuchten, and J.R. Williams. 1996. Unsaturated soil hydraulic database, UNSODA 1.0 user's manual. Rep. EPA/600/R-96/095. USEPA, Ada, OK.
57. Leij, F.J., and S.A. Bradford. 1994. 3DADE: A computer program for evaluating three-dimensional equilibrium solute transport in porous media. Res. Rep. 134. U.S. Salinity Lab., Riverside, CA.
58. Leij, F.J., W.B. Russell, and S.M. Lesch. 1997. Closed-form expressions for water retention and conductivity data. Ground Water 35:848-853.
59. Leij, F.J., T.H. Skaggs, and M.Th. van Genuchten. 1991. Analytical solutions for solute transport in three-dimensional semi-infinite porous media. Water Resour. Res. 27:2719-2733.
60. Leij, F.J., and N. Toride. 1997. N3DADE: A computer program for evaluating nonequilibrium three-dimensional equilibrium solute transport in porous media. Res. Rep. 143. U.S. Salinity Lab., Riverside, CA.
61. Leij, F.J., N. Toride, and M.Th. van Genuchten. 1993. Analytical solutions for non-equilibrium solute transport in three-dimensional porous media. J. Hydrol. 151:193-228.
62. Lenhard, R.J., J.C. Parker, and J.J. Kaluarachchi. 1991. Comparing simulated and experimental hysteretic two-phase transient fluid flow phenomena. Water Resour. Res. 27:2113-2124.
63. Li, J., J. Zhang, and M. Rao. 2005. Water flow and nitrate transport under surface drip fertigation. Trans. ASAE 48:627-637.
64. Marquardt, D.W. 1963. An algorithm for least-squares estimation of nonlinear parameters. SIAM J. Appl. Math. 11:431-441.
65. McCray, J. 2007. HYDRUS: Software review. Southwest Hydrol. 6(1):41.
66. Mendoza, C.A., R. Therrien, and E.A. Sudicky. 1991. ORTHOFEM user's guide. Version 1.02. Centre for Groundwater Res., Univ. of Waterloo, Waterloo, ON, Canada.
67. Meshkat, M., R.C. Warner, and S.R. Workman. 1999. Modeling of evaporation reduction in drip irrigation system. J. Irrig. Drain. Eng. 125:315-323.
68. Mualem, Y. 1976. A new model for predicting the hydraulic conductivity of unsaturated porous media. Water Resour. Res. 12:513-522.
69. Nemes, A., M.G. Schaap, F.J. Leij, and J.H.M. Wosten. 2001. Description of the unsaturated soil hydraulic database UNSODA. Version 2.0. J. Hydrol. 251:151-162.
70. Neuman, S.P. 1972. Finite element computer programs for flow in saturated-unsaturated porous media. 2nd Annu. Rep. Project A10-SWC-77. Hydraulic Eng. Lab., Technion, Haifa, Israel.
71. Neuman, S.P. 1973. Saturated-unsaturated seepage by finite elements. J. Hydraul. Div. Am. Soc. Civ. Eng. 99:2233-2250.
72. Neuman, S.P. 1975. Galerkin approach to saturated-unsaturated flow in porous media. p. 201-217. In R.H. Gallagher et al. (ed.) Finite elements in fluids. Vol. 1. Viscous flow and hydrodynamics. John Wiley & Sons, London.
73. Neuman, S.P., R.A. Feddes, and E. Bresler. 1974. Finite element simulation of flow in saturated-unsaturated soils considering water uptake by plants. 3rd Annu. Rep. Project A10-SWC-77. Hydraulic Eng. Lab., Technion, Haifa, Israel.
74. Pang, L., and J. Šimůnek. 2006. Evaluation of bacteria-facilitated cadmium transport in gravel columns using the HYDRUS colloid-facilitated solute transport model. Water Resour. Res. 42:W12S10, doi:10.1029/2006WR004896.
75. Parker, J.C., and M.Th. van Genuchten. 1984. Determining transport parameters from laboratory and field tracer experiments. Bull. 84-3. Virginia Agric. Exp. Stn., Blacksburg.
76. Parkhurst, D.L., and C.A.J. Appelo. 1999. User's guide to PHREEQC (Version 2): A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations. Water-Resour. Invest. Rep. 99-4259. USGS, Denver, CO.
77. Pot, V., J. Šimůnek, P. Benoit, Y. Coquet, A. Yra, and M.-J. Martínez-Cordón. 2005. Impact of rainfall intensity on the transport of two herbicides in undisturbed grassed filter strip soil cores. J. Contam. Hydrol. 81:63-88.
78. Richards, L.A. 1931. Capillary conduction of fluid through porous mediums. Physics 1:318-333.
79. Ramos, T.B., M.C. Goncalves, and J.C. Martins. 2006. Estimation of soil hydraulic properties from numerical inversion of tension disk infiltrometer data. Vadose Zone J. 5:684-696.
80. Rassam, D., J. Šimůnek, and M.Th. van Genuchten. 2003. Modeling variably saturated flow with HYDRUS-2D. ND Consult, Brisbane, Australia.
81. Rassam, D., J. Šimůnek, and M.Th. van Genuchten. 2004. Modeling variably saturated flow with HYDRUS-2D. (Japanese transl., N. Toride,and M. Inoue [ed.]) Jpn. Irrig. and Drain. Soc., Tokyo.
82. Roth, K. 1995. Steady state flow in an unsaturated, two-dimensional, macroscopically homogeneous, Miller-similar medium. Water Resour. Res. 31:2127-2140.
83. Roth, K., and K. Hammel. 1996. Transport of conservative chemical through an unsaturated two-dimensional Miller-similar medium with steady state flow. Water Resour. Res. 32:1653-1663.
84. Saito, H., J. Šimůnek, and B. Mohanty. 2006. Numerical analyses of coupled water, vapor and heat transport in the vadose zone. Vadose Zone J. 5:784-800.
85. Sansoulet, J., Y.-M. Cabidoche, P. Cattan, S. Ruy, and J. Šimůnek. 2008. Spatially distributed water fluxes in an Andisol under banana plants: Experiments and three-dimensional modeling. Vadose Zone J. 7:819-829 (this issue).
86. Scanlon, B. 2004. Review of HYDRUS-1D. Southwest Hydrol. 3(4):37.
87. Scanlon, B., K. Keese, R.C. Reedy, J. Šimůnek, and B. Andraski. 2003. Variations in flow and transport in thick desert vadose zones in response to paleoclimatic forcing (0-90 kyr): Monitoring, modeling, and uncertainties. Water Resour. Res. 39(7):1179, doi:10.1029/2002WR001604.
88. Schaap, M.G., and J.J. Leij. 2000. Improved prediction of unsaturated hydraulic conductivity with the Mualem-van Genuchten model. Soil Sci. Soc. Am. J. 64:843-851.
89. Schaap, M.G., F.J. Leij, and M.Th. van Genuchten. 1998. Neural network analysis for hierarchical prediction of soil water retention and saturated hydraulic conductivity. Soil Sci. Soc. Am. J. 62:847-855.
90. Schaap, M.G., F.J. Leij, and M.Th. van Genuchten. 2001. Rosetta: A computer program for estimating soil hydraulic parameters with hierarchical pedotransfer functions. J. Hydrol. 251:163-176.
91. Schaap, M.G., and M.Th. van Genuchten. 2006. A modified Mualem-van Genuchten formulation for improved description of the hydraulic conductivity near saturation. Vadose Zone J. 5:27-34.
92. Schaerlaekens, J., D. Mallants, J. Šimůnek, M.Th. van Genuchten, and J. Feyen. 1999. Numerical simulation of transport and sequential biodegradation of chlorinated aliphatic hydrocarbons using CHAIN_2D. Hydrol. Processes 13:2847-2859.
93. Schijven, J., and J. Šimůnek. 2002. Kinetic modeling of virus transport at field scale. J. Contam. Hydrol. 55:113-135.
94. Schmitz, G.H., N. Schutze, and U. Petersohn. 2002. New strategy for optimizing water application under trickle irrigation. J. Irrig. Drain. Eng. 128:287-297.
95. Šejna, M., and J. Šimůnek. 2007. HYDRUS (2D/3D): Graphical user interface for the HYDRUS software package simulating two- and three-dimensional movement of water, heat, and multiple solutes in variably-saturated media. Available at www.pc-progress.cz (verified 20 Feb. 2008). PC-Progress, Prague, Czech Republic.
96. Šejna, M., J. Šimůnek, D.L. Suarez, and M.Th. van Genuchten. 1994. Unstructured mesh generation and its application in models of two-dimensional transport processes. p. 97. In 1994 Agronomy abstracts. ASA, Madison, WI.
97. Selker, J. 2004. Book review: Modelling variably saturated flow with HYDRUS-2D. Vadose Zone J. 3:725.
98. Seo, H.S., J. Šimůnek, and E.P. Poeter. 2007. Documentation of the HYDRUS package for MODFLOW-2000, the U.S. Geological Survey modular ground-water model. GWMI 2007-01. Int. Ground Water Modeling Ctr,, Colorado School of Mines, Golden.
99. Šimůnek, J., R. Angulo-Jaramillo, M.G. Schaap, J.-P. Vandervaere, and M.Th. van Genuchten. 1998a. Using an inverse method to estimate the hydraulic properties of crusted soils from tension disc infiltrometer data. Geoderma 86:61-81.
100. Šimůnek, J., C. He, J.L. Pang, and S.A. Bradford. 2006a. Colloid-facilitated transport in variably saturated porous media: Numerical model and experimental verification. Vadose Zone J. 5:1035-1047.
101. Šimůnek, J., and J.W. Hopmans. 2002. Parameter optimization and nonlinear fitting. p. 139-157. In J.H. Dane and G.C. Topp (ed.) Methods of soil analysis. Part 4. Physical methods. SSSA Book Ser. 5. SSSA, Madison, WI.
102. Šimůnek, J., K. Huang, and M.Th. van Genuchten. 1995. The SWMS_3D code for simulating water flow and solute transport in three-dimensional variably saturated media. Version 1.0. Res. Rep. 139. U.S. Salinity Lab., Riverside, CA.
103. Šimůnek, J., K. Huang, and M.Th. van Genuchten. 1998b. The HYDRUS code for simulating the one-dimensional movement of water, heat, and multiple solutes in variably-saturated media. Version 6.0. Res. Rep. 144. U.S. Salinity Lab., Riverside, CA.
104. Šimůnek, J., D. Jacques, J.W. Hopmans, M. Inoue, M. Flury, and M.Th. van Genuchten. 2002. Solute transport during variably saturated flow inverse methods. p. 1435-1449. In J.H. Dane and G.C. Topp (ed.) Methods of soil analysis. Part 4. Physical methods. SSSA Book Ser. 5. SSSA, Madison, WI.
105. Šimůnek, J., D. Jacques, M.Th. van Genuchten, and D. Mallants. 2006b. Multicomponent geochemical transport modeling using the HYDRUS computer software packages. J. Am. Water Resour. Assoc. 42:1537-1547.
106. Šimůnek, J., N.J. Jarvis, M.Th. van Genuchten, and A. Gärdenäs. 2003. Review and comparison of models for describing non-equilibrium and preferential flow and transport in the vadose zone. J. Hydrol. 272:14-35.
107. Šimůnek, J., and J.R. Nimmo. 2005. Estimating soil hydraulic parameters from transient flow experiments in a centrifuge using parameter optimization technique. Water Resour. Res. 41(4):W04015, doi:10.1029/ 2004WR003379.
108. Šimůnek, J., M. Šejna, and M.Th. van Genuchten. 1996a. The HYDRUS-2D software package for simulating water flow and solute transport in two-dimensional variably saturated media. Version 1.0. IGWMC-TPS-53. Int. Ground Water Modeling Ctr., Colorado School of Mines, Golden.
109. Šimůnek, J., M. Šejna, and M.Th. van Genuchten. 1998c. The HYDRUS-1D software package for simulating the one-dimensional movement of water, heat, and multiple solutes in variably-saturated media. Version 2.0. IGWMC-TPS-70. Int. Ground Water Modeling Ctr., Colorado School of Mines, Golden.
110. Šimůnek, J., M. Šejna, and M.Th. van Genuchten. 1999a. The HYDRUS-2D software package for simulating two-dimensional movement of water, heat, and multiple solutes in variably saturated media. Version 2.0. IGWMC-TPS-53. Int. Ground Water Modeling Ctr., Colorado School of Mines, Golden.
111. Šimůnek, J., and D.L. Suarez. 1993a. Modeling of carbon dioxide transport and production in soil: 1. Model development. Water Resour. Res. 29:487-497.
112. Šimůnek, J., and D.L. Suarez. 1993b. UNSATCHEM-2D code for simulating two-dimensional variably saturated water flow, heat transport, carbon dioxide production and transport, and multicomponent solute transport with major ion equilibrium and kinetic chemistry. Version 1.1. Res. Rep. 128. U.S. Salinity Lab., Riverside, CA.
113. Šimůnek, J., and D.L. Suarez. 1993c. The SOILCO2 code for simulating one-dimensional carbon dioxide production and transport in variably saturated porous media. Version 1.1. Res. Rep. 127. U.S. Salinity Lab., Riverside, CA.
114. Šimůnek, J., and D.L. Suarez. 1994. Major ion chemistry model for variably saturated porous media. Water Resour. Res. 30:1115-1133.
115. Šimůnek, J., and D.L. Suarez. 1997. Sodic soil reclamation using multicomponent transport modeling. J. Irrig. Drain. Eng. 123:367-376.
116. Šimůnek, J., D.L. Suarez, and M. Šejna. 1996b. The UNSATCHEM software package for simulating one-dimensional variably saturated water flow, heat transport, carbon dioxide production and transport, and multicomponent solute transport with major ion equilibrium and kinetic chemistry. Version 2.0. Res. Rep. 141. U.S. Salinity Lab., Riverside, CA.
117. Šimůnek, J., and M.Th. van Genuchten. 1994. The CHAIN_2D code for simulating two-dimensional movement of water flow, heat, and multiple solutes in variably-saturated porous media. Version 1.1. Res. Rep. 136. U.S. Salinity Lab., Riverside, CA.
118. Šimůnek, J., and M.Th. van Genuchten. 1996. Estimating unsaturated soil hydraulic properties from tension disc infiltrometer data by numerical inversion. Water Resour. Res. 32:2683-2696.
119. Šimůnek, J., and M.Th. van Genuchten. 1997. Estimating unsaturated soil hydraulic properties from multiple tension disc infiltrometer data. Soil Sci. 162:383-398.
120. Šimůnek, J., and M.Th. van Genuchten. 2000. The DISC computer software for analyzing tension disc infiltrometer data by parameter estimation. Version 1.0. Res. Rep. 145. U.S. Salinity Lab., Riverside, CA.
121. Šimůnek, J., and M.Th. van Genuchten. 2008. Modeling nonequilibrium flow and transport processes using HYDRUS. Vadose Zone J. 7:782-797 (this issue).
122. Šimůnek, J., M.Th. van Genuchten, and M. Šejna. 2005. The HYDRUS-1D software package for simulating the one-dimensional movement of water, heat, and multiple solutes in variably-saturated media. Version 3.0. HYDRUS Softw. Ser. 1. Dep. of Environ. Sci., Univ. of California, Riverside, CA.
123. Šimůnek, J., M.Th. van Genuchten, and M. Šejna. 2006c. The HYDRUS software package for simulating two- and three-dimensional movement of water, heat, and multiple solutes in variably-saturated media: Technical manual. Version 1.0. PC-Progress, Prague, Czech Republic.
124. Šimůnek, J., M.Th. van Genuchten, M. Šejna, N. Toride, and F.J. Leij. 1999b. The STANMOD computer software for evaluating solute transport in porous media using analytical solutions of convection-dispersion equation. Versions 1.0 and 2.0. IGWMC-TPS-71. Int. Ground Water Modeling Ctr., Colorado School of Mines, Golden.
125. Šimůnek, J., T. Vogel, and M.Th. van Genuchten. 1992. The SWMS_2D code for simulating water flow and solute transport in two-dimensional variably saturated media. Version 1.1. Res. Rep. 126. U.S. Salinity Lab., Riverside, CA.
126. Šimůnek, J., T. Vogel, and M.Th. van Genuchten. 1994. The SWMS_2D code for simulating water flow and solute transport in two-dimensional variably saturated media. Version 1.2. Res. Rep. 132. U.S. Salinity Lab., Riverside, CA.
127. Šimůnek, J., O. Wendroth, and M.Th. van Genuchten. 1998d. A parameter estimation analysis of the evaporation method for determining soil hydraulic properties. Soil Sci. Soc. Am. J. 62:894-905.
128. Šimůnek, J., O. Wendroth, N. Wypler, and M.Th. van Genuchten. 2001. Nonequilibrium water flow characterized from an upward infiltration experiment. Eur. J. Soil Sci. 52:13-24.
129. Skaggs, T.H., T.J. Trout, J. Šimůnek, and P.J. Shouse. 2004. Comparison of HYDRUS-2D simulations of drip irrigation with experimental observations. J. Irrig. Drain. Eng. 130:304-310.
130. Suarez, D.L., and J. Šimůnek. 1993. Modeling of carbon dioxide transport and production in soil: 2. Parameter selection, sensitivity analysis, and comparison of model predictions to field data. Water Resour. Res. 29:499-513.
131. Toride, N., F.J. Leij, and M.Th. van Genuchten. 1993. A comprehensive set of analytical solutions for nonequilibrium solute transport with first-order decay and zero-order production. Water Resour. Res. 29:2167-2218.
132. Toride, N., F.J. Leij, and M.Th. van Genuchten. 1995. The CXTFIT code for estimating transport parameters from laboratory or field tracer experiments. Version 2.0. Res. Rep. 137. U.S. Salinity Lab., Riverside, CA.
133. Tseng, P.-H., and W.A. Jury. 1994. Comparison of transfer function and deterministic modeling of area-averaged solute transport in a heterogeneous field. Water Resour. Res. 30:2051-2063.
134. Twarakavi, N.K.C., J. Šimůnek, and S. Seo. 2008. Evaluating interactions between groundwater and vadose zone using HYDRUS-based flow package for MODFLOW. Vadose Zone J. 7:757-768 (this issue).
135. Tyler, S. 2004. Review of HYDRUS-2D. Southwest Hydrol. 3:37.
136. van Genuchten, M.Th. 1978a. Calculating the unsaturated hydraulic conductivity with a new, closed-form analytical model. Res. Rep. 78-WR-8. Water Resour. Program, Dep. of Civil Eng., Princeton Univ., Princeton, NJ.
137. van Genuchten, M.Th. 1978b. Numerical solutions of the one-dimensional saturated-unsaturated flow equation. Res. Rep. 78-WR-9. Water Resour. Program, Dep. of Civil Eng., Princeton Univ., Princeton, NJ.
138. van Genuchten, M.Th. 1978c. Mass transport in unsaturated-saturated media: One-dimensional solutions. Res. Rep. 78-WR-11. Water Resour. Program, Dep. of Civil Eng., Princeton Univ., Princeton, NJ.
139. van Genuchten, M.Th. 1980a. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J. 44:892-898.
140. van Genuchten, M.Th. 1980b. Determining transport parameters from solute displacement experiments. Res. Rep. 118. U.S. Salinity Lab., Riverside, CA.
141. van Genuchten, M.Th. 1981a. Analytical solutions for chemical transport with simultaneous adsorption, zero-order production and first-order decay. J. Hydrol. 49:213-233.
142. van Genuchten, M.Th. 1981b. Non-equilibrium transport parameters from miscible displacement experiments. Res. Rep. 119. U.S. Salinity Lab., Riverside, CA.
143. van Genuchten, M.Th. 1985. Convective-dispersive transport of solutes involved in sequential first-order decay reactions. Comput. Geosci. 11:129-147.
144. van Genuchten, M.Th. 1987. A numerical model for water and solute movement in and below the root zone. Res. Rep. 121. U.S. Salinity Lab., Riverside, CA.
145. van Genuchten, M.Th., and W.J. Alves. 1982. Analytical solutions of the one-dimensional convective-dispersive solute transport equation. Tech. Bull. 1661. U.S. Gov. Print. Office, Washington, DC.
146. van Genuchten, M.Th., F.J. Leij, and S.R. Yates. 1991. The RETC code for quantifying the hydraulic functions of unsaturated soils. USEPA, Washington, DC.
147. van Genuchten, M.Th., and R.J. Wagenet. 1989. Two-site/two-region models for pesticide transport and degradation: Theoretical development and analytical solutions. Soil Sci. Soc. Am. J. 53:1303-1310.
148. van Genuchten, M.Th., and P.J. Wierenga. 1976. Mass transfer studies in sorbing porous media: I. Analytical solutions. Soil Sci. Soc. Am. J. 40:473-480.
149. van Genuchten, M.Th., and P.J. Wierenga. 1986. Solute dispersion coefficients and retardation factors. p. 1025-1054. In A. Klute (ed.) Methods of soil analysis. Part 1. Physical and mineralogical methods. 2nd ed. Agron. Monogr. 9. ASA and SSSA, Madison, WI.
150. Vogel, T. 1987. SWMII: Numerical model of two-dimensional flow in a variably saturated porous medium. Res. Rep. 87. Dep. of Hydraul. and Catchment Hydrol., Agricultural Univ., Wageningen, the Netherlands.
151. Vogel, T. 1990. Numerical modeling of water flow in non-homogeneous soil profile. (In Czech.) Ph.D. diss. Czech Technical Univ., Prague.
152. Vogel, T., and M. Císlerová. 1988. On the reliability of unsaturated hydraulic conductivity calculated from the moisture retention curve. Transp. Porous Media 3:1-15.
153. Vogel, T., K. Huang, R. Zhang, and M.Th. van Genuchten. 1996. The HYDRUS code for simulating one-dimensional water flow, solute transport, and heat movement in variably-saturated media. Version 5.0. Res. Rep. 140. U.S. Salinity Lab., Riverside, CA.
154. Vrugt, J.A., M.T. van Wijk, J.W. Hopmans, and J. Šimůnek. 2001. One-, two-, and three-dimensional root water uptake functions for transient modeling. Water Resour. Res. 37:2457-2470.
155. Wagenet, R.J., and J.L. Hutson. 1987. LEACHM: Leaching estimation and chemistry model. A process-based model of water and solute movement, transformations, plant uptake and chemical reactions in the unsaturated zone. Continuum 2. Dep. of Agronomy, Cornell Univ., Ithaca, NY.
156. Wang, D., J.A. Knuteson, and S.R. Yates. 2000. Two-dimensional model simulation of 1,3-dichloropropene volatilization and transport in a field soil. J. Environ. Qual. 29:639-644.
157. Wang, D., S.R. Yates, and J. Gan. 1997. Temperature effect on methyl bromide volatilization in soil fumigation. J. Environ. Qual. 26:1072-1079.