Unsaturated Flow Characterization and Modeling

• Znidarcic, D., Illangasekare, T. and Manna, M., 1991. Laboratory testing of and parameter estimation for two-phase flow problems, Proc. of the Geotechnical Engineering Congress,  McLean, Campbell and Harris, ASCE, New York,  10781089, 1991.
• Nachabe, M. and H. Illangasekare, 1994. Use of tension infiltrometer data with unsaturated hydraulic conductivity models, Groundwater 32(6), 1017-1021.
• Nachabe, M. Islas, A. and Illangasekare, H., 1995. Analytical solutions for water flow and solute transport in the unsaturated zone, Groundwater, 33(2) 304-310.
• Nachabe, M.H., H. Illangasekare, H.J. Morel-Seytoux and H. Ruan, 1997. Infiltration over a heterogeneous watershed: influence of rainfall excess, ASCE J. of Hydrologic Engineering.
• Ruan, H, and H. Illangasekare, (1998) A model to couple overland flow and infiltration into macroporous vadose zone, J. of Hydrology, 210, pp 116-127.
• Ryan, J.N., H. Illangasekare, M.I. Litaor, and R. Shannon, 1998. Particle and Plutonium mobilization in macroporous soils during rainfall simulations, Envir. Scien. & Tech., 32, pp 476-482.
• Ruan, H, and H. Illangasekare, (1999). Estimation of relative hydraulic conductivity based on a sheet model, J. of Hydrology, 218, pp 83-93.
• Walser, G.S., H. Illangasekare and A.T. Corey, Retention of liquid contaminants in layered soils, Contaminant Hydrology, 39, pp91-108.
• Wildenschild, D., K. H. Jensen, K.J. Hollenbeck,H. Illangasekare, D. Znidarcic and T. Sonnenborg, 1997. A twostage procedure for determining hydraulic characteristics using syringe pump and outflow observations, J. of Soil Sci. Soc of Amer. 61(2), 347-359.
• Scovazzo, P, H. Illangasekare, A. Hoehn, and P. Todd^, 2001. Modeling of two-phase flow in membranes and porous media in low gravity as applied to plant irrigation in micro-gravity, Water Resources Research, 37(5), 1231-1243.
• Sakaki, T. and   H. Illangasekare, 2007. Comparison of height-averaged and point-measured capillary pressure–saturation relations for sands using a modified Tempe cell, Water Resour. Res., doi:10.1029/2006WR005814.
• Sakaki, T., A. Limsuwat, K. M. Smits, and H. Illangasekare (2008), Empirical two-point a-mixing model for calibrating the ECH2O EC-5 soil moisture sensor in sands, Water Resour. Res. Special Collection on Hydrologic Measurement Methods, 44, W00D08, doi: 10.1029/ 2008
• Sakaki, T., D. M. O’Carroll, and T. H. Illangasekare, 2010, Direct Quantification of Dynamic Effects in Capillary Pressure for Drainage–Wetting Cycles, V09-0105, Vadose Zone Journal, 424-437.
• Smits, K. M., T. Sakaki, A. Limsuwat, and T. H. Illangasekare, 2010, Thermal Conductivity of Sands under Varying Moisture and Porosity in Drainage–Wetting Cycles, V09-0095, Vadose Zone Journal, 172-180.doi:10.2136/vzj2009.0095
• Camps‐Roach, G., D. M. O’Carroll, T. A. Newson, T. Sakaki, and T. H. Illangasekare, Experimental investigation of dynamic effects in capillary pressure: Grain size dependency and upscaling Water Resour. Res., 46, W08544, doi:10.1029/2009WR008881, 2010.
• Fucík, R., J. Mikyska, T. Sakaki, M. Benes, and T. H. Illangasekare, 2010. Significance of Dynamic Effect in Capillarity during Drainage Experiments in Layered Porous Media, Vadose Zone Journal, August 2010; 9: 697 – 708.
• Sakaki, T., A. Limsuwat, and T. H. Illangasekare (2011), An improved air pressure measuring method and demonstrated application to drainage in heterogeneous soils, Vadose Zone Journal, V10-0121, v. 10; no. 2; p. 526-531; DOI: 10.2136/vzj2010.0036
• Sakaki, T., A. Limsuwat, and T. H. Illangasekare, 2011. A Simple Method for Calibrating Dielectric Soil Moisture Sensors: Laboratory Validation in Sands, Vadose Zone Journal, May 2011, v. 10, p. 526-531(http://vzj.geoscienceworld.org/content/10/2/526.abstract?sid=c99ea641-946c-4793-a635-cdbf59383d9d)
• Sakaki, T., A. Limsuwat, A. Cihan, C. C. Frippiat, and T. H. Illangasekare (2012), Water retention in a coarse pocket under wetting and drainage, Vadose Zone Journal, 11:223-230, doi:10.2136/vzj2011.0028.
• Smits, K. M., T. Sakaki, A. Limsuwat, and T. H. Illangasekare (2010). Thermal conductivity of sands under varying moisture and porosity in drainage-wetting cycles. Vadose Zone J., 9:doi:10.2136/vzj2009.0095.
• Smits, K.M., T. Sakaki, S.E. Howington, J. F. Peters and T.H. Illangasekare (2012). Temperature dependence of thermal properties of sands over a wide range of temperatures [30-70oC], Vadose Zone J., 10.2136/vzj2012.0033
• Smits, K.M., A. Cihan, T. Sakaki, S.E. Howington, J.F. Peters, and T. H. Illangasekare (2012). Experimental and modeling investigation of soil moisture and thermal behavior in the vicinity of buried objects. IEEE Trans. in Geosci. Remote Sens., 10.1109/TGRS.2012.2214485.
• Cihan, A., J. Birkholzer, H. Illangasekare and Q.Zhou, 2014. A Modeling Approach to Represent Hysteresis in Capillary Pressure-Saturation Relationship Based on Fluid Connectivity in Void Space, submitted in 2013. Water Resources Research, 50, 119-131.
• Smits, K.M., T. Sakaki, S.E. Howington, J. F. Peters and H. Illangasekare, 2013. Temperature dependence of thermal properties of sands over a wide range of temperatures [30-70oC], Vadose Zone, J., 10.2136/vzj2012.0033