Professional Experience:

Research: 1997-present Director, Water Resources Research Institute

1988-2000 Professor and Department Head
Department of Soil, Water and Environmental Science
University of Arizona
Tucson, AZ

1982-1983 Visiting Professor
Swiss Federal Institute of Technology
Zurich

1977-1988 Professor
Department of Agronomy and Horticulture
New Mexico State University
Las Cruces, NM

1972-1977 Associate Professor
Department of Agronomy
New Mexico State University
Las Cruces, NM

1974-1975 Charge de Recherches, CNRS
Institute of Fluid Mechanics
Grenoble, France

1968-1972 Assistant Professor
Department of Agronomy
New Mexico State University
Las Cruces, NM

1965-1968 Post-graduate Research Water Scientist
University of California, Davis

1961-1963 Research Assistant
Institute of Land and Water Management
Wageningen, The Netherlands

Teaching: Soil-Water Relations (undergraduate)
Soils Physics (graduate)
Computer Simulation (graduate)

Professional services:

Memberships: American Society of Agronomy
Soil Science Society of America
American Geophysical Union
American Association for the Advancement of Science
Western Soil Science Society
Royal Society of Agricultural Science, The Netherlands
European Geophysical Society

Offices: Chairman: Soil Physics Division, Soil Science Society of America, 1979
Associate Editor: Soil Science Society of America Journal, 1978-1984
Associate Editor: Water Resources Research, 1984-1989
Associate Editor: Journal of Contaminant Hydrology, 1995-present
Editorial Advisory Board, Agricultural Water Management Journal, 1981-1991
Member: Translation Committee, Soil Science Society of America, 1978-1980
Member: Water Resources Committee, 1974, Soil Science Society of America
Member: Program Development and Review Board, New Mexico Water Resources Research Institute, 1976 - 1982
Member: Unsaturated Zone Committee, American Geophysical Union, 1984-1990
Chairman: Training of Soil Scientists Committee, Soil Science Society of America, 1984-1987
Member: Board of Directors, Soil Science Society of America and American Society of Agronomy, 1985-1988
Chairman: Committee on Ethical Issues of Agricultural Research, Soil Science Society of America, 1986-1989

Member: Boyoucos, Distinguished Service, and Honorary membership award committees, Soil Science Society of America, 1987
Chairman: Soil and Groundwater Pollution Working Group, International Society of Soil Science
Member: Organization, Policy and Bylaws Committee, American Society of Agronomy, 1977- present
Member: Peer Review Panel, EPA. Environmental Physics and Chemistry, 1980-1992
Member: Science Advisory Committee, Land and Water Quality Studies, Electric Power Research Institute, 1981-1994
Member: Board of Directors, American Society of Agronomy, 1990-1993
President: Western Society of Soil Science, 1991

Professional
awards: Outstanding Research Award, College of Agriculture, New Mexico State University, Las Cruces, NM, 1977
Fellow American Society of Agronomy, 1981
Fellow Soil Science Society of America, 1981
Westhafer Award for Excellence in Research at New Mexico State University, 1982
Fellow American Association for the Advancement of Science, 1989
Fellow American Geophysical Union, 1997
Honor
societies: Phi Kappa Phi
Sigma Xi
Gamma Sigma Delta

Consulting: El Paso Natural Gas Company, Texas
Battelle Pacific Northwest, Washington
Los Alamos Scientific Laboratories, New Mexico
Sandia National Laboratories, New Mexico
Public Service Company of New Mexico, New Mexico
Electric Power Research Institute, Palo Alto, California
Tetra Tech, California
U. S. Environmental Protection Agency, Washington, DC
Office of Technology Assessment of the U. S. Congress, Washington, DC
U. S. Department of Energy, Idaho
Bechtel, Richland, WA

Publications:

1. Wierenga, P. J., R. M. Hagan. 1966. Effects of cold irrigation water on soil temperature and crop growth. Calif. Agr. 20:14-16.

2. Wierenga, P. J., D. R. Nielsen, and R. M. Hagan. 1969. Thermal properties of a soil based upon field and laboratory measurements. Soil Sci. Soc. Amer. Proc. 33:354-360.

3. Wierenga, P. J., R. M. Hagan, and D. R. Nielsen. 1970. Soil temperature profiles during infiltration and redistribution of cool and warm irrigation water. Water Resour. Res. 6:230-238.

4. Wierenga, P. J. and C. T. deWit. 1970. Simulation of heat transfer in soils. Soil Sci. Soc. Amer. Proc. 34:845-848.

5. Stucky, H. R., G. L. Cunningham, and P. J. Wierenga. 1970. Water and people in New Mexico. In: Environment, People and Culture, New Mexico State Univ. Press. pp. 20-22.

6. Wierenga, P. J. 1971. Soil temperature. In: Desert Biome. A biotic Specialists Meeting. Tucson, Arizona. March 6-7, 1970. pp. 77-80.

7. Wierenga, P. J., R. M. Hagan, and E. J. Gregory. 1971. Effects of irrigation water temperature on soil temperature. Agron. J. 63:33-36.

8. Wierenga, P. J. and T. C. Patterson. 1972. Irrigation return flow studies in the Mesilla Valley. In: Managing Irrigated Agriculture to Improve Water Quality. Proceedings National Conference on Managing Irrigated Agriculture to Improve Water Quality, May 16-18, 1972.

9. Wierenga, P. J., R. J. Black, and P. Manz. 1973. A multichannel syringe pump for steady state flow in soil columns. Soil Sci. Soc. Amer. Proc. 37:133-134.

10. O'Connor, G. A. and P. J. Wierenga. 1973. The persistence of 2,4,5-T in greenhouse lysimeter studies. Soil Sci. Soc. Amer. Proc. 37:398-401.

11. Patterson, T. C. and P. J. Wierenga. 1973. Influence of trickle irrigation on irrigation return flow. Paper No. 73-2506. American Soc. of Agricultural Engineers. St. Joseph, Michigan, 49085.

12. van Genuchten, M. Th., J. M. Davidson, and P. J. Wierenga. 1974. An evaluation of kinetic and equilibrium equations for the prediction of pesticide movement through porous media. Soil Sci. Soc. Amer. Proc. 38:29-35.

13. Westcot, D. W. and P. J. Wierenga. 1974. Transfer of heat by conduction and vapor movement in a closed soil system. Soil Sci. Soc. Amer. Proc. 39:9-14.

14. Cassel, D. K., M. Th. van Genuchten, and P. J. Wierenga. 1974. Simulation of nitrate movement through gardena very fine sandy loam. Proceedings Summer Computer Simulation Conference, Houston, July 9-11, 263-270.

15. Patterson, T. C. and P. J. Wierenga. 1974. Irrigation return flow as influenced by drip irrigation. Proceedings of the International Drip Irrigation Congress. San Diego, California. July 7-14. 376-381.

16. Wierenga, P. J. and T. C. Patterson. 1974. Quality of irrigation return flow in the Mesilla Valley. Proceedings of the 10th International Congress of Soil Science, Moscow, USSR, August 12-20, Volume X, 216-222.

17. Rai, Dhanpat, P. J. Wierenga, and W. L. Gould. 1974. Chemical and physical properties of core samples from a coal bearing formation in San Juan County, New Mexico. New Mexico Exp. Sta. Res. Rpt. 287.
18. van Genuchten, M. Th. and P. J. Wierenga. 1974. Simulation of one-dimensional solute transfer in porous media. New Mexico Agr. Exp. Sta. Bull. 628.

19. Rai, Dhanpat, P. J. Wierenga, and W. L. Gould. 1975. Chemical and physical properties of soil samples from a coal-bearing formation in San Juan County, New Mexico. N. Mex. State Univ. Agr. Exp. Sta. Res. Rpt. 294.

20. Dane, J. H. and P. J. Wierenga. 1975. Effect of hysteresis on the prediction of infiltration, redistribution and drainage of water in a layered soil. J. of Hydrology 25:229-242.

21. Wierenga, P. J., M. Th. van Genuchten and F. W. Boyle. 1975. Transfer of boron and tritiated water through sandstone. J. of Environ. Qual. 4:83-87.

22. Cassel, D. K., M. Th. van Genuchten, and P. J. Wierenga. 1975. Predicting anion movement in disturbed and undisturbed soils. Soil Sci. Soc. Amer. Proc. 39:1015-1019.

23. Wierenga, P. J., M. J. Shaffer, S. P. Gomez, and G. A. O'Connor. 1975. Predicting ionic distributions in large soil columns. Soil Sci. Soc. Amer. Proc. 39:1080-1084.

24. Gould, W. L., D. Rai, and P. J. Wierenga. 1975. Problems in reclamation of coal mine spoils in New Mexico. In: Practices and Problems of Land Reclamation in Western North America (ed. by Mohan K. Wali). Univ. of North Dakota Press. p. 107-121.

25. Gaudet, J. P., H. Jegat, F. de Smedt, P. Wierenga, and G. Vachaud. 1975. Transfert d'un creneau d'elution dans une colonne de sol non sature. C. R. Acad. Sc. Paris, t. 281:615-617.

26. Wierenga, P. J. and van Genuchten. 1975. Solute movement in porous media with lateral diffusion. Proceedings A.T.P. Hydro-geology. Dispersion de Fluides Miscibles en milieu Poreux, Grenoble, France.

27. Vauclin, M., J. Touma, P. Wierenga, and G. Vachaud. 1975. Comparison entre differents schemas de resolution numerique de l'equation de l'infiltration. Letters of Heat and Mass Transfer 2:473-480.

28. Vachaud, G., P. J. Wierenga, J. P. Gaudet, and H. Jegat. Simulation of miscible displacement in unsaturated porous media. 1976. In: G. C. Van Steenkiste (ed.), System simulation in water resources. North- Holland Publishing Co. 129-143.

29. van Genuchten, M. Th. and P. J. Wierenga. 1976. Numerical solution for convective dispersion with intra-aggregate diffusion and non-linear adsorption. In: G. C. Van Steenkiste (ed.). System simulation in water resources. North-Holland Publishing Co. 275-292.

30. van Genuchten, M. Th. and P. J. Wierenga. 1976. Mass transfer studies in sorbing porous media. I. Analytical solution. Soil Sci. Soc. Amer. Proc. 40:473-480.

31. O'Connor, G. A., M. Th. van Genuchten, and P. J. Wierenga. 1976. Predicting 2,4,5-T movement in soil columns. J. of Environ. Qual. 5:375-378.

32. van der Pol, R. M., P. J. Wierenga, and D. R. Nielsen. 1977. Solute movement in a layered field soil. Soil Sci. Soc. Amer. J. 41:10-13.

33. van Genuchten, M. Th. and P. J. Wierenga. 1977. Mass transfer studies in sorbing porous media. II. Experimental evaluation with tritium. Soil Sci. Soc. Amer. J. 41:272-278.

34. van Genuchten, M. Th., P. J. Wierenga, and G. A. O'Connor. 1977. Mass transfer studies in sorbing porous media. III. Experimental evaluation with 2,4,5T. Soil Soc. Amer. J. 41:278-285.

35. Haverkamp, R., M. Vauclin, J. Touma, P. J. Wierenga, and G. Vachaud. 1977. A comparison of numerical simulation models for one dimensional infiltration. Soil Sci. Soc. Amer. J. 41:285-294.

36. Wierenga, P. J. 1977. Influence of trickle and surface irrigation on return flow quality. Environmental Protection Technology Series. EPA-600/2-77-093. pp. 158.

37. Willis, W. O., P. J. Wierenga, and T. T. Vredenburg. 1977. Fall soil water: Effect on summer soil temperature. Soil Sci. Soc. Amer. J. 41:615-617.

38. Wierenga, P. J. and J. B. Sisson. 1977. Effects of irrigation management on soil salinity and return flow quality. Proc. Natl. Conf. on Irr. Return Flow Quality Management. May 16-19, 115-123.

39. Wierenga, P. J. 1977. Research: Past, present and future needs for section 208 Planning. Proc. of the Twenty-second annual New Mexico Water Conf. WRRI Report No. 089:45-62.

40. Gaudet, J. P., H. Jegat, G. Vachaud, and P. Wierenga. 1977. Solute transfer, with exchange between mobile and stagnant water, through unsaturated sand. Soil Sci. Soc. Amer. J. 41:665-671.

41. Al-Khafaf, S., P. J. Wierenga, and B. C. Williams. 1977. A flotation method for determining root mass in soil. Agron. J. 69:1025-1027.

42. Wierenga, P. J. 1977. Solute distribution profiles computed with steady state and transient water movement models. Soil Sci. Soc. Amer. J. 41:1050-1055.

43. de Smedt, F. and P. J. Wierenga. 1977. Simulation of water and solute transport in unsaturated soils. Proc. 3rd. Intern. Symp. in Hydrology. Fort Collins, June 27-29.

44. de Smedt, H. and P. J. Wierenga. 1978. Approximate analytical solution for solute flow during infiltration and redistribution. Soil Sci. Soc. Amer. J. 42:407-412.

45. Al-Khafaf, S., P. J. Wierenga, and B. C. Williams. 1978. Evaporative flux from trickle-irrigated cotton as related to leaf area index, soil-water and evaporative demand. Agron. J. 70:912-917.

46. de Smedt, F. and P. J. Wierenga. 1978. Mass transfer in porous media with immobile water. J. of Hydrology 41:59-67.

47. de Smedt, F. and P. J. Wierenga. 1978. Solute transport through soil with non-uniform water content. Soil Sci. Soc. Am. J. 42:7-10.

48. de Smedt, F. and P. J. Wierenga. 1979. A generalized solution for solute flow in soils with mobile and immobile water. Water Res. Res. 15:1137-1142.

49. Fowler, J. L. and P. J. Wierenga. 1979. Cotton response to two water application levels under trickle irrigation. N. M. Agr. Exp. Sta. Res. Rpt. no. 392.

50. Wierenga, P. J. and B. Kies. 1979. Effects of desertification on soil physical properties. Presented at Symposium on "Effects of Desertification on Soil Chemical, Physical, and Biological Properties." American Society for the Advancement of Science. Houston, Jan. 7, 1979.

51. Beese, F. and P. J. Wierenga. 1979. Zur Bedeuting der Thetta-Psi - Beziehung in boden hydrologischen Modellen. Mitteilungen der Deutschen Bodenkundlichen Gesellschaft. Band 29:101-110.

52. Beese, F. and P. J. Wierenga. 1980. Solute transport through soil computed with a transient and a constant flux model. Soil Science 129:245-253.

53. Wierenga, P. J. 1980. Quality of irrigation return flow in the Middle Rio Grande Basin. Proceedings Inter-American Conference on Salinity and Water Management Technology. El Paso, Texas. Dec. 13 and 14, 1979. pp. 203-213.

54. Horton, R., P. J. Wierenga, and F. Beese. 1980. Water use of chile peppers. Proceedings Inter-American Conference on Salinity and Water Management Technology. El Paso, Texas. Dec. 13 and 14, 1979. pp. 137-149.

55. O'Connor, G. A., P. J. Wierenga, H. H. Cheng, and K. G. Doxtader. 1980. Movement of 2,4,5-T through large soil columns. Soil Sci. 130:157-162.

56. de Smedt, F., S. Al-Khafaf, and P. J. Wierenga. 1981. Simulation of water flow in plants and soils. In: Progress in Ecological Engineering and Management by Mathematical Modelling. Proc. 2nd Intern. Conf. on the State-of-the-Art in Ecological Modelling. Liege (Belgium). :849-863.

57. Duffy, C., P. J. Wierenga, and R. A. Kselik. 1981. Variations in infiltration rate based on soil survey information and field measurements. Agric. Exp. Sta. Bull. 680. pp. 40.

58. Sisson, J. B. and P. J. Wierenga. 1981. Spatial variability of steady-state infiltration rates as a stochastic process. Soil Sci. Soc. Amer. J. 45:699-704.

59. Nielsen, D. R. and P. J. Wierenga. 1981. Movement of water and solutes in fields soils. Proc. of the Third Colloquium on Planetary Water. Niagra Falls, N.Y. 27-29 October, 1980. 5-6.

60. Gee, G. W., A. C. Campbell, P. J. Wierenga, and T. L. Jones. 1981. Unsaturated moisture and radionuclide transport: Laboratory analysis and modeling. Battelle Pacific Northwest Laboratory PNL-3616. pp. 27.
61. Jones, T. L., G. W. Gee, and P. J. Wierenga. 1981. Radionuclide transport under changing soil salinity conditions. Proc. Conf. on "Modeling and low-level waste management: an interagency workshop." Dec. 1-4, 1980. 155-165.

62. Nielsen, D. R., J. W. Biggar, and P. J. Wierenga. 1982. Nitrogen transport processes in soils. Agronomy Monograph no. 22. Chapter 11: ASA, Madison, Wisc. 423-445.

63. Wierenga, P. J., D. R. Nielsen, R. Horton, and B. Kies. 1982. Effects of tillage on soil temperature and thermal conductivity. In: Predicting Tillage Effects on Soil Physical Properties and Processes. ASA Special Publication no. 44. 69-91.

64. Panpruik, P., B. D. McCaslin, and P. J. Wierenga. 1982. Effects of trickle-fertilization on chile. N. M. Agric. Exp. Sta. Res. Rpt. 480.

65. Beese, F., R. Horton, and P. J. Wierenga. 1982. Growth and yield response of chile pepper to trickle irrigation. Agron. J. 74:556 562.

66. Horton, R., F. Beese, and P. J. Wierenga. 1982. Physiological response of chile pepper to trickle irrigation. Agron. J. 74:551-556.

67. Horton, R., P. J. Wierenga, and D. R. Nielsen. 1982. A rapid technique for obtaining uniform water content distributions in unsaturated soil columns. Soil Sci. 133:397-399.

68. Persaud, N. and P. J. Wierenga. 1982. A differential model for one-dimensional cation transport in discrete homoionic ion-exchange media. Soil Sci. Soc. Amer. J. 46:482-490.

69. Wierenga, P. J. 1982. Solute transport through soils: Mobil-immobile water concepts. In: Arnold, G. M., G. W. Gee and R. W. Nelson eds. Proc. Symposium on Unsaturated Flow and Transport Modelling. Battelle Northwest and the U. S. Nuclear Regulatory Commission. March 23-24, 1982, pp. 211-229.

70. Lansford, R. R., P. J. Wierenga, Th. W. Sammis, and B. J. Creel. 1982. Demonstration of irrigation return flow quality control in the Mesilla Valley, New Mexico. Project Summary. EPA-600/S2-82-071. pp. 4.
71. Horton, R. and P. J. Wierenga. 1983. Estimating the soil heat flux from observations of soil temperature near the surface. Soil Sci. Soc. Amer. J. 47:14-20.

72. Horton, R., P. J. Wierenga, and D. R. Nielsen. 1983. Evaluation of methods for determining the apparent thermal diffusivity of soil near the surface. Soil Science Society of Amer. J. 47:25-32.

73. Horton, R. and P. J. Wierenga. 1983. Determination of the mean soil temperature for evaluation of heat flux in soil. Agric. Meteor. 28:309-319.

74. Marthaler, H. P., W. Vogelsanger, F. Richard, and P. Wierenga. 1983. A pressure transducer for field tensiometers. Soil Sci. Soc. Amer. J. 47:624-627.

75. Wierenga, P. J. 1983. Yield and quality of trickle irrigated chile. Agric. Exp. Sta. Bull. 73. pp. 16.

76. Nielsen, D. R., K. Reichardt, and P. J. Wierenga. 1983. Characterization of field-measured soil-water properties. In: Radiation Techniques in Soil Physics and Irrigation Studies. 1983 International Atomic Energy Agency, Vienna. 55-78.

77. Nkedi-Kizza, P., J. W. Biggar, M. Th. van Genuchten, P. J. Wierenga, H. M. Selim, J. M. Davidson, and D. R. Nielsen. 1983. Modelling tritium and chloride-36 transport through an aggregated Oxisol. Water Res. Res. 19:691-700.

78. Beese, F. and P. J. Wierenga. 1983. The variability of the apparent diffusion coefficient in undisturbed soil columns. Zeitschrift fur Pflanzanernahrung und Bodenkunde 146(3):302-315.

79. Nielsen, D. R., P. J. Wierenga, and J. W. Biggar. 1983. Spatial soil variability and mass transfers from agricultural soils. In: Proc. Symp. Chemical Mobility and Reactivity in Soil Systems, Atlanta, Nov. 29 - Dec. 3, 1981. 5:65-78.

80. Beese, F. and P. J. Wierenga. 1983. Simulation of water and chloride movement in field lysimeters. Zeitschrift fur Pflanzenernahrung und Bodenkunde. 146(6):760-771.

81. Gelhar, L. W., P. J. Wierenga, K. R. Rehfeldt, C. J. Duffy, M. J. Simonet, T. C. Yeh, and W. R. Strong. 1983. Irrigation return flow water quality monitoring, modeling and variability in the middle Rio Grande Valley, New Mexico. EPA-Project Summary, EPA-600/S2-83-072.

82. Sabol, G., H. Bouwer, and P. J. Wierenga. 1983. Irrigation and groundwater in Arizona and New Mexico. Proc. ASCE Irrigation and Drainage Specialty Conf., Jackson, Wyoming. 192-199.

83. Horton, R. and P. J. Wierenga. 1984. The effect of column wetting on soil thermal conductivity. Soil Sci. 138:102-108.

84. Nkedi-Kizza, P., J. W. Biggar, H. M. Selim, M. Th. van Genuchten, P. J. Wierenga, J. M. Davidson, and D. R. Nielsen. 1984. On the equivalence of two conceptual models for describing ion exchange during transport through an aggregated oxisol. Water Resour. Res. 20:1123-1130.

85. de Smedt, F. and P. J. Wierenga. 1984. Solute transfer through columns of glass beads. Water Resour. Res. 20:225-232.

86. Duffy, C. J., L. W. Gelhar, and P. J. Wierenga. 1984. Stochastic models in agricultural watersheds. J. of Hydrology 69:145-163.

87. Horton, R., O. Aguirre-Luna, and P. J. Wierenga. 1984. Observed and predicted two dimensional soil temperature distributions under a row crop. Soil Sci. Soc. Amer. J. 48:1147-1152.

88. Horton, R., O. Aguirre-Luna, and P. J. Wierenga. 1984. Soil temperatures in a row crop with incomplete surface cover. Soil Sci. Soc. Amer. J. 48:1225-1232.

89. Buchter, B., J. Leuenberger, P. J. Wierenga, and F. Richard. 1984. Preparation of large core samples from stony soils. Soil Sci. Soc. Amer. J. 48:1460-1462.

90. Al-Khafaf, S. and P. J. Wierenga. 1984. CSMP model for predicting water distribution under field conditions. Measurements and Computations. J. of Agric. and Water Resources 3(1):1-18.

91. Saddiq, M. H., P. J. Wierenga, J. Hendrickx, and M. Hussain. 1985. Spatial variability of soil water tension in irrigated soil. Soil Sci. 140(2):126-132.

92. Wierenga, P. J. and J. M. H. Hendrickx. 1985. Yield and quality of trickle irrigated chile. Agricultural Water Management 9:339-356.

93. Schulin, R., P. J. Wierenga, and H. Fluhler. 1985. In: Solute Displacement Through a Rendzina. eds. J. Bouma and P. A. C. Raats. Proceedings of the ISSS Symposium on water and solute movement in heavy clay soils. ILRI Publication 37:262-267.

94. Wierenga, P. J. 1985. Spatial variability of soil water properties in irrigated soils. In: Soil Spatial Variability. eds. D. R. Nielsen and J. Bouma. Proceedings of a workshop of the ISSS and the SSSA. Las Vegas, USA. :112-129.

95. Wierenga, P. J. 1985. Trickle irrigation of chile peppers. Proc. Symposium: Water and Science. N. M. Water Resources Research Institute :50-62.

96. Wierenga, P. J. and M. H. Saddiq. 1985. Optimum soil water tension for trickle irrigated chile peppers. Proc. 3rd Intern. Drip/Trickle Irrigation Congress. Nov. 17-21, Fresno, Ca. 193-198.

97. van Genuchten, M. Th. and P. J. Wierenga. 1986. Determination of solute dispersion coefficients. In: A. Klute ed. Methods of Soil Analysis. American Society of Agronomy, Madison. :1025-1053.

98. Bach, L. B., P. J. Wierenga, and T. J. Ward. 1986. Estimation of the Philip infiltration parameters from rainfall simulation data. Soil Sci. Soc. Amer. J. 50:1319-1323.

99. Wierenga, P. J. 1986. Applications of spatial analyses in field studies on soil moisture. Trans. XIII Congress of the International Society of Soil Science. Vol. IV. 1622-1624.

100. Yeh, J. T. C., Lynn W. Gelhar, and P. J. Wierenga. 1986. Observations of spatial variability of soil-water pressure in a field soil. Soil Science 142:7-12.

101. Hendrickx, J. M. H., P. J. Wierenga, M. S. Nash, and D. R. Nielsen. 1986. Boundary location from texture, soil moisture and infiltration rate. Soil Sci. Soc. Amer. J. 50:1515-1520.

102. Wierenga, P. J., L. W. Gelhar, C. S. Simmons, G. W. Gee and T. J. Nicholson. 1986. Validation of Stochastic Flow and Transport Models for Unsaturated Soils: A Comprehensive Field Study. NUREG report/CR-4622 PNL-5876. pp. 54.

103. Wierenga, P. J., J. M. H. Hendrickx, M. H. Nash, J. Ludwig, and L. Daugherty. 1987. Variation of soil and vegetation with distance along a transect in the Chihuahuan Desert. J. of Arid Zone Environments 13(1):53-64.

104. Schulin, R., P. J. Wierenga, H. Fluhler, and J. Leuenberger. 1987. Solute transport through a stony soil. Soil Sci. Soc. Amer. J. 51:36-41.

105. Wierenga, P. J. 1987. Future developments in soil science: solute transport. American Society of Agronomy :23-35.

106. Sabol, G.V., H. Bouwer, and P. J. Wierenga. 1987. Irrigation effects in Arizona and New Mexico: Special section on Effects of Irrigated Agriculture on Groundwater Quality: Am. Soc. Civil Eng., J. of Irrig. and Drainage Eng. 113:30-48.

107. Wierenga, P. J., J. L. Fowler and D. D. Davis. 1987. Use of tensiometers for scheduling drip-irrigated cotton. Proc. Intern. Conf. on Measurement of Soil and Plant Water Status. Logan, Utah. July 6-10. Vol. 1:157-161.

108. Hendrickx, J. M. H., P. J. Wierenga and N. S. Urquhart. 1988. Optimal design of field experiments for determination of production functions. Soil Sci. Soc. of Amer. 52:494-499.

109. Greenholtz, D. E., T. C. Jim Yeh, Maliha S.B. Nash and P. J. Wierenga. 1988. Geostatistical analysis of soil hydrological properties in a field plot. J. of Contaminant Hydrology 3:227-250.

110. Nash, M. H., L. A. Daugherty, A. Gutjahr, P. J. Wierenga and S. A. Nance. 1988. Horizontal and vertical kriging of soil properties along a transect in southern New Mexico. Soil Sci. Soc. Amer. J. 52:1086-1090.

111. Boyle, F. W., H. Elabd, and P. J. Wierenga. 1988. Evaluation of the convection-dispersion equation using laboratory column studies Proc. Intern. Conf. on Validation of Flow and Transport Models, Ruidoso, NM :20-25.

112. Elabd, H., I. Porro and P. J. Wierenga. 1988. Estimation of field transport parameters using the convection dispersion equation. Proc. Intern. Conf. on Validation of Flow and Transport Models, Ruidoso, NM :78-87.

113. Hills, R. G., D. B. Hudson, I. Porro and P. J. Wierenga. 1988. Modelling one-dimensional infiltration at the Jornada test facility. Proc. Intern. Conf. on Validation of Flow and Transport Models, Ruidoso, NM :147-157.

114. Wierenga, P. J. 1988. Validation of flow and transport models at the Jornada test facility. Proc. Intern. Conf. on Validation of Flow and Transport Models, Ruidoso, NM :525-530.

115. Nash, M.S., P. J.Wierenga and A. Butler-Nance. 1989. Variation in tension, water content and drainage rate along a 91 m transect. Soil Sci. 148:94-102.

116. Wierenga, P. J. and M. Th. van Genuchten. 1989. Solute transport through small and large columns. Groundwater 27:35-42.

117. Nicholson, T. J., P. J. Wierenga, G. W. Gee, E. A. Jacobson, D. D. McLaughlin and L. W. Gelhar. 1989. Validation of stochastic flow and transport models for unsaturated soils: A comprehensive field study. 1987. Proc. DOE/AECL '87 Conf. on Geostatistical Sensitivity and Uncertainty Methods for Groundwater Flow and Radionuclide Transport Modeling, pp. 275-297.

118. Boyle, F. W., W. R. Strong and P. J. Wierenga. 1989. A simple, low-cost vacuum system. Soil Science Soc. Amer. J. 53:298.

119. Hills, R. G., I. Porro, D. B. Hudson and P. J. Wierenga. 1989. Modelling one-dimensional infiltration into very dry soils. Part 1. Water Content Versus Pressure Head Based Algoriths. Water Resour. Res. 25:1259-1269.

120. Hills, R. G., I. Porro, D. B. Hudson, and P. J. Wierenga. 1989. Modelling one-dimensional infiltration into very dry soils. Part 2. Estimation of the soil-water parameters and model predictions. Water Resour. Res. 25:1271-1281.

121. Al-Khafaf, S., F. A. Sharhan, P. J. Wierenga and A. D. Iyada. 1989. Some empirical relations for the prediction of soil evaporation, transpiration and root water uptake under field conditions. Agric. Water Management 16(4):323-337.

122. Wierenga, P. J., A. F. Toorman, D. B. Hudson, J. Vinson, M. Nash and R. G. Hills. 1989. Soil physical properties and the Las Cruces trench site. U.S. Nuclear Regulatory Commission Report. NUREG/CR-5441. pp. 91.

123. Hendrickx, J.M.H. and P. J. Wierenga. 1990. Variability of soil water tension in a trickle irrigated chile pepper field. Irrigation Science 11:23-30.

124. Hendrickx, J.M.H., P. J. Wierenga and M. S. Nash. 1990. Variability of soil water tension and soil water content. Agricultural Water Management 18(2):135-149.

125. Bond, W.J. and P.J. Wierenga. 1990. Immobile water during solute transport in unsaturated sand columns. Water Resour. Res. 26:2475-2481.

126. Wierenga, P.J. and R.G. Hills. 1990. A field test for validation of flow and transport models. Transactions 14th Intern. Congress of Soil Sciences, Kyoto, Japan, Aug. 12-18; Vol. I:4-9.

127. Wierenga, P.J., D.B. Hudson, R.G. Hills, I. Porro, M.R. Kirkland and J. Vinson. 1990. Flow and transport at the Las Cruces Trench Site. Experiment 1 and 2. U.S. Nuclear Regulatory Commission Report. NUREG/CR-5607; pp. 413.

128. Wierenga, P.J., R.G. Hills and D.B. Hudson. 1991. The Las Cruces Trench Site: experimental results and one dimensional flow predictions. Water Resour. Res. 27:2695-2705.

129. Hills, R.G., P.J. Wierenga, D.B. Hudson and M.R. Kirkland. 1991. The second Las Cruces trench experiment: Experimental results and two-dimensional flow predictions. Water Resour. Res. 27:2707-2718.

130. Nash, M.S., P.J. Wierenga and A. Gutjahr. 1991. Time series analysis of soil moisture and rainfall along a line transect in arid rangeland. Soil Science 152:189-199.

131. Hills, R.G. and P.J. Wierenga. 1991. Model validation at the Las Cruces trench site. U.S. Nuclear Regulatory Commission Report NUREG/CR-5716; pp. 87.

132. Nash, M. S., A. Toorman, P. J. Wierenga, A. Gutjahr and G. Cunningham. 1991. Estimation of vegetation based on soil moisture in rangeland using cokriging. Soil Science 154:25-37.

133. Kirkland, M.R., R.G. Hills, and P.J. Wierenga. 1992. Algorithms for solving Richards' equation for variably saturated soils. Water Resourc. Res. 28:2049-2059.

134. Porro, I., and P.J. Wierenga. 1992. Transport of reactive tracers by unsaturated flow using field and column experiments. Proc. Radionuclide Adsorption Workshop, Los Alamos, NM, 111-123.

135. Toorman, A.F., P.J. Wierenga and R.G. Hills. 1992. Parameter estimation of hydraulic properties from one-step outflow data. Water Resourc. Res. 8:3021-3028.

136. Schulin, R., H. Fluhler, M.H. Selim, B. Sevruk and P.J. Wierenga. 1992. Snow Cover Measurements and Areal Assessment of Soil Moisture. World Meteorological Organization Operational Hydrology Report No. 35: pp. 283.

137. Wierenga, P.J., M.H. Young, G.E. Gee, R.G. Hills, C.T. Kincaid, T.J. Nicholson and R.E. Cady. 1992. Soil Characteristic Methods for Unsaturated Low-Level Waste Sites. U.S. Nuclear Regulatory Commission Report. NUREG/CR-5988, pp. 141.

138. Hills, R.G., P. J. Wierenga and D. B. Hudson. 1993. Spatial variability at the Las Cruces Trench Site. in Proc. Workshop "Indirect Methods for Estimating the Hydraulic Properties of Unsaturated Soils. Riverside, California, Oct. 11-13, 1989. :529-539.

139. Porro, I., P.J. Wierenga and R.G. Hills. 1993. Solute transport through large uniform and layered soil columns. Water Resourc. Res. 29(4):1321-1330.

140. Porro, I., and P.J. Wierenga. 1993. Transient and steady state solute transport through a large unsaturated soil column. Ground Water. 31(2):193-200.

141. Estrella, R. M.L. Brusseau, I.L. Pepper, P.J. Wierenga and R.M. Miller. 1993. Biodegradation, sorption and transport of 2,4-D in a saturated and unsaturated soil. Appl. Envir. Microbiol. 59:4266-4273.

142. Gee, G.W., P.J. Wierenga, B.J. Andraski, M.H. Young., M.J. Fayer, M.L. Rockhold. 1994. Variations in water balance and recharge at three western desert sites. Soil Sci. Soc. Amer. J. 58:63-72.

143. Hills, R.G., K.A. Fisher, M.R. Kirkland and P.J. Wierenga. 1994. Application of flux corrected transport to the Las Cruces trench site. Water Resour. Res. 30:2377-2385.

144. Hills, R.G. and P.J. Wierenga. 1994. Intraval Phase IIa. Model testing at the Las Cruces trench site. U.S. Nuclear Regulatory Commission. Report. NUREG/CR-6063.

145. Wierenga, P.J. 1994. Water and solute transport and storage. In Wilson et al. Handbook of Vadose Zone Characterization and Monitoring. Lewis Publishers, Boca Raton, pp. 41-60.

146. Wierenga, P.J., R.G. Hills, A.W. Warrick and T.C. Yeh. 1994. Controlled field study for validation of vadose zone transport models. U.S. Nuclear Regulatory Commission Report. NUREG/CR-6120.

147. Pan, L. and P.J. Wierenga. 1995. A transformed pressure head based approach to solve Richards' equation for variably saturated soils. Water Resour. Res. 31-925-931.

148. Wierenga, P.J and M.L. Brusseau. 1995. Water and contaminant transport in the vadose zone. Chapter 6. In Environmental Hydrology. Vijay Singh, ed. Kluwer Academic Publishers. :165-193.

149. Hudson, D.B., P.J. Wierenga and R.G. Hills. 1996. Unsaturated hydraulic properties from upward flow into soil cores. Soil Science Soc. Amer. J. 60:388-396.

150. Wierenga, P.J. 1996. Physical processes affecting contaminant fate and transport in soil and water. In Pollution Science, Academic Press. I.L. Pepper, C.P. Gerba and M.L. Brusseau (eds.), pp. 45-62.

151. Young, M.H., P.J. Wierenga and C.A. Mancino. 1996. Large weighing lysimeters for water use and solute transport studies. Soil Sci. 161:491-501.

152. Pan, L., A.W. Warrick and P.J. Wierenga. 1996. Finite element methods for modeling water flow in variably saturated porous media: Numerical oscillation and mass-distribution schemes. Water Resour. Res. 32:1883-1889.

153. Wierenga, P.J., R.G. Hills, M.H. Young and J. Vinson. 1996. A field study for evaluating unsaturated zone flow and transport models. In Peter R. Stevens and Thomas J. Nicholson eds. U.S. Geological Survey Water Resources-Investigations Report 95-4015: 119-136.

154. Young, M.H., P.J. Wierenga, A.W. Warrick, L.L. Hofmann, and S.A. Musil. 1996. Field testing plan for unsaturated zone monitoring and field studies. NUREG/CR-6462. Washington, DC, pp. 50.

155. Young, M.H., P.J. Wierenga and C.F. Mancino. 1997. Monitoring near-surface soil water storage in turfgrass using time domain reflectometry and weighing lysimetry. Soil Sci. Soc. Amer. J. 61:1138-1147.

156. Young, M.H., J.B. Fleming, P.J. Wierenga and A.W. Warrick. 1997. Rapid laboratory calibration of time-domain reflectometry using upward infiltration. Soil Sci. Soc. Amer. J. 61:707-712.

157. Warrick, A.W., L. Pan, and P.J. Wierenga. 1997. Downward water flow through sloping layers in the vadose zone: Steady-state analytical solutions. J. Hydrology 192:321-337.

158. Pan, Lehua and P.J. Wierenga. 1997. Improving numerical modeling of two-dimensional water flow in variably saturated and heterogeneous porous media. Soil Sci. Soc. Amer. J. 61:335-346.

159. Pan, Lehua, A.W. Warrick and P.J. Wierenga. 1997. Downward water flow through sloping layers in the vadose zone: Time-dependence and effect of slope length. J. Hydrololgy 199(1-2):36-52.

160. Vinson, J., P.J. Wierenga, R.G. Hills and M.H. Young. 1997. Flow and transport at the Las Cruces Trench Site: Experiment IIb. U.S. Nuclear Regulatory Commission Report. NUREG/CR-6437.

161. Scanlon, B.R., S.W. Tyler and P.J. Wierenga. 1997. Hydrologic issues in arid, unsaturated systems and implications for contaminant transport. Review of Geophysics. 35-4:461-490.

162. Warrick, A.W., P.J. Wierenga, M.H. Young and S.A. Musil. 1998. Diurnal fluctuations of tensiometric readings due to surface temperature changes. Water Resour. Res. 34:2863-2869.

163. Warrick, A.W., M.H. Young and P.J. Wierenga. 1998. Probabilistic analysis of monitoring systems for detecting contaminant plumes. Groundwater 36:894-900.

164. Warrick, A.W., L. Pan and P.J. Wierenga. 1999. Water flow in desert soils near buried waste respositories. In Vadose Zone Hydrology: Cutting across disciplines. Oxford University Press, NY: Parlange, M.B. and J.W. Hopmans (eds.). 374-396.

165. Young, M.H., P.J. Wierenga, A.W. Warrick, L.L. Hofmann, and S.A. Musil. 1999. Variability of wetting front velocities during a field-scale infiltration experiment. Water Resour. Res. 35:3079-3089.

166. Young, M.H., P.J. Wierenga, A.W. Warrick, L.L. Hofmann, S.A. Musil, M. Yao, C.J. Mai, Z. Zou, and B.R. Scanlon. 1999. Results of field studies at the Maricopa Environmental Monitoring Site, Arizona. U.S. Nuclear Regulatory Commission Report. NUREG/CR-5694. 261 pp.

167. Nelson, N.T., M.L. Brusseau, T.D. Carlson, M.S. Constanza, M.H. Young, G,R. Johnson, and P.J. Wierenga. 1999. The gas-phase partitioning tracer method for the in situ measurement of soil-water content. Water Resour. Res. 35:3699-3707.

168. Young, M.H., Warrick, A.W., P.J. Wierenga, L.L. Hofmann and S.A. Musi. 1999. Comparing monitoring strategies at the Maricopa Environmental Monitoring Site, Arizona. U.S. Nuclear Regulatory Commission Report. NUREG/CR-5698. 47 pp.

169. Zou, Ze-Yuan, Michael H. Young, Zhen Li and Peter J. Wierenga. 2001. Estimation of depth averaged unsaturated soil hydraulic properties from infiltration experiments. J. of Hydrology 242:26-42

170. Brown, P.W., C.F. Mancino, M.H. Young, T.L. Thompson, P.J. Wierenga and D.M. Kopec. 2001. Penman Monteith crop coefficients for use with desert turf systems. Crop Science 41:1197-1206

171. Van Pelt, R.S. and P.J. Wierenga. 2001. Temporal stability of spatially measured soil matric potential probability density function. Soil Sci. Soc. Am. J. 65:660-677

172. Thomasson, M.J., and P.J. Wierenga, 2003. Spatial variability of the effective retardation factor in an unsaturated field soil. J. of Hydrology (in press)

173. Neuman, S. P. and P.J. Wierenga. 2003 A comprehensive strategy of hydrogeologic modeling and uncertainty analysis for nuclear facilities and sites. NUREG report #xxxx

174. Wenbin Wang, Shlomo P. Neuman, Tzung-mow Yao, and Peter J. Wierenga. 2003. Use of public, generic and site data to model large-scale field infiltration and tracer experiments in the vadose zone: 1. Conceptualization and site characterization. Vadose Zone Journal (submitted).

175. Wenbin Wang, Shlomo P. Neuman, Tzung-mow Yao, and Peter J. Wierenga. 2003.
Use of public, generic and site data to model large-scale field infiltration and tracer experiments in the vadose zone: 2. Flow and transport simulation. Vadose Zone Journal (submitted)

176.Yao, T., C.J. Mai, P. J. Wierenga, S.P. Neuman, and A.R. Graham. 2003. Results of ponding infiltration and tracer experiments at the Apache Leap research site, Arizona. NUREG report #xxxx

177. Carlson, T.D., M.S. Costanza, J. Keller, P.J. Wierenga and M.L. Brusseau. 2003. Intermediate-scale tests of the gas-phase partitioning tracer method for measuring soil-water content. Soil Sci. Soc. Amer. J. 2003 (in press).

Reports:

1. Hagan, R. M. and P. J. Wierenga. 1966. Water temperature in relation to crop growth. Ann. Rpt. No. 3, Cal. State Dept. Water Resources. pp. 169.

2. Wierenga, P. J., G. A. O'Connor, and H. E. Dregne. 1972. Soil and water management for salinity control. Technical Completion Report. July 1968-August 1972. N. M. Water Resources Research Institute Rpt. No. 018. pp. 57.

3. Wierenga, P. J. and T. C. Patterson. 1973. Quality and quantity of return flow as influenced by trickle and surface irrigation. New Mexico Water Resources Research Institute Report No. 014.

4. Wierenga, P. J. and T. C. Patterson. 1974. Quality and quantity of return flow as influenced by trickle and surface irrigation. New Mexico Water Resources Research Institute Report No. 042, pp. 41.

5. Lansford, R. R., P. J. Wierenga, L. W. Gelhar, T. A. Howell, C. M. Hohn and G. O. Ott. 1976. Demonstration of irrigation return flow salinity control in the upper Rio Grande. New Mexico Water Resources Research Report No. 070.

6. Lansford, R. R., P. J. Wierenga, L. W. Gelhar, T. W. Sammis, C. M. Hohn, and G. O. Ott. 1977. Demonstration of irrigation return flow salinity control in the upper Rio Grande. New Mexico Water Resources Research Report No. 086.

7. Wierenga, P. J. and C. Duffy. 1979. Impacts of irrigated agriculture on water quality in the Rio Grande below Albuquerque. N. M. Eng. Exp. Sta. Rpt. pp. 141.

8. Al-Khafaf, S., P. J. Wierenga, and B. C. Williams. 1979. Improved method of estimating crop consumptive use and distribution of soil water in irrigated soil profiles. New Mexico Water Resources Research Institute Report. No. 103. pp. 200.

9. Wierenga, P. J. 1979. Soil salinity and cotton yields as affected by surface and trickle irrigation. N. M. Water Resources Res. Inst. Report no. 106. pp. 212.

10. Gelhar, L. W., P. J. Wierenga, et al. 1980. Irrigation return flow studies at San Acacia, New Mexico: Monitoring, Modeling and Variability. Report No. H-3, Geophysical Research Center, N. M. Inst. of Mining and Technology, Socorro.

11. Lansford, R. R., P. J. Wierenga, T. W. Sammis, and B. J. Creel. 1981. Demonstration of irrigation return flow water quality control in the Mesilla Valley, N. M. Final report EPA, pp. 139.

12. Wierenga, P. J., C. Duffy, R. Senn, and L. W. Gelhar. 1981. Impacts of irrigated agriculture on water quality in the Rio Grande below Albuquerque. Final Report N. M. Environmental Improvement Division, pp. 140.

13. de Smedt, F., P. J. Wierenga, and A. van der Beken. 1981. Theoretical and experimental study of solute movement through porous, media with mobile and immobile water. Report V. U. B. Hydrology - 6 pp. 219.

14. Persaud, N. and P. J. Wierenga. 1982. Solute interactions and transport in soils from waste disposal sites at Sandia Laboratories. Special Report Department of Agronomy, New Mexico State University, Las Cruces, NM. pp. 237.

15. Gelhar, L. W., P. J. Wierenga, K. R. Rehfeldt, C. J. Duffy, M. J. Simonett, T. C. Yeh, and W. R. Strong. 1983. Irrigation return flow water quality monitoring, modelling and variability in the Middle Rio Grande Valley, New Mexico. Report Dept. of Geoscience, New Mexico Institute of Mining and Technology, Socorro, NM, and Department of Crop and Soil Sciences, New Mexico State University, Las Cruces. pp. 493.

16. Hendrickx, J. M. H., P. J. Wierenga, and M. S. Nash. 1984. Variability of soil water tension and soil water content. Paper no. 84-2509. American Society of Agricultural Engineers Winter Meeting, New Orleans, LA, pp. 26.

17. Wierenga, P. J. 1985. Solute transport through deep unsaturated soil columns. Research Report 85-SS-01. Department of Crop and Soil Sciences, New Mexico State University, Las Cruces, NM, pp. 47.

18. Wierenga, P. J., W. Strong, M. Heinen, D. Hudson, and M. Th. van Genuchten. 1985. Validation of stochastic flow and transport models for unsaturated soils. Research Report 85-SS-02. Department of Crop and Soil Sciences, New Mexico State University, Las Cruces, NM, pp. 67.

19. Wierenga, P. J. 1986. Consumptive use and salt accumulation with trickle irrigation of row crops. Water Resources Research Report no. 203. pp. 29.

20. Wierenga, P. J., I. Porro, W. Strong, J. Vinson, D. Hudson, M. Nash, and A. Schneeberger. 1986. Validation of stochastic flow and transport models for unsaturated soils. Research Report 86-SS-01, Dept. of Agronomy and Horticulture, New Mexico State University, Las Cruces, NM.

21. Wierenga, P. J., D. Batchelet, J. R. Bilskie, H. Elabd, C. Herold, D. Hudson, I. Porro and W. R. Strong. Weather data. Daily and monthly means. March 1983 - October 1987. Jornada LTER Site. Research report 88-SS-02, Dept. of Agronomy and Horticulture, New Mexico State University, Las Cruces, NM.

22. Wierenga, P. J., D. Batchelet, J. R. Bilskie, H. Elabd, D. B. Hudson, M. Nash, I. Porro, W. R. Strong, A. Toorman, J. Vinson. Validation of stochastic flow and transport models for unsaturated soils. Research Report 88-SS-03, Dept. of Agronomy and Horticulture, New Mexico State University, Las Cruces, NM.

23. van Pelt, R. Scott and P. J. Wierenga. 1989. Water use by and salinity effects upon trickle irrigated grape production in the Southern Basin and Range Province of New Mexico. N.M. Water Resources Research institute, Technical Completion Report. Prog. #1345627. pp. 76.

24. Wierenga, P. J., D. Hudson, J. Vinson, M. Nash, and A. Toorman. 1989. Soil physical properties at the Las Cruces trench site. Soil and Water Science Report #89-002. Univ. of Arizona, Tucson.

25. Vinson, J. R., D. B. Hudson, P. J. Wierenga and M. Nash. 1989. Validation of stochastic flow and transport models for unsaturated soils. Redistribution I Core Report. Dept. of Soil and Water Science, Univ. of Arizona. pp. 31.

26. Kool, J.B., P.S. Huyahorn, and P.J. Wierenga. 1991. Model calibration and simulation of flow in a heterogenous soil. Proc. Intn. Conf. on Calibration and Reliability in Groundwater Modeling. (In press).

27. Bassett, R.L., S.P. Neuman, P.J. Wierenga, G.R. Davidson, A.M. Geddis, A.G. Guzman, E.L. Hardin, D.L. Thompson and E.G. Woodhouse. 1996. Validation studies for assessing unsaturated flow and transport through unsaturated fractured rock. NUREG/CR-6459.

28. Bassett, R.L., S.P. Neuman, P.J. Wierenga, C. Chen, G.R. Davidson, E.L. Hardin, W.A. Illman, M.T. Murrell, D.M. Stephens, M.J. Thomasson, D.L. Thompson and E.G. Woodhouse. Data collection and field experiments at the Apache Leap Research Site. NUREG/CR-6497.

updated 02/05/03